***MODIS Atmosphere QA Plan***

***for Collection 005***

***Deep Blue Aerosol Update***

> ![](media/image1.wmf){width="4.155555555555556in"
> height="3.589583333333333in"}

Version 3.6

2 May 2007

by

Paul A Hubanks1

based on previous version by

Allen Chu,7 Bill Ridgway,1 Kathy Strabala,2 Steve Platnick,3

Shana Mattoo,4 Eric Moody,4 Michael D King,5 Rich Hucek6

1 NASA Goddard Space Flight Center, Code 613.2/SSAI, Greenbelt, MD
20071;

2 NOAA CIMSS/SSEC University of Wisconsin-Madison, Madison, WI 53719;

3 NASA Goddard Space Flight Center, Code 613.2, Greenbelt, MD 20071;

4 NASA Goddard Space Flight Center, Code 613.2/L3 Communications,
Greenbelt, MD 20071;

5 NASA Goddard Space Flight Center, Code 610, Greenbelt, MD 20071;

6 MODIS SDST/DSTI, Seabrook, MD 20706;

7 NASA Goddard Space Flight Center, Code 613.2, Greenbelt, MD
20071/JCET-UMBC

**Table of Contents**

1.0 Introduction 1

> 1.1 QA Approach 2

2.0 Level 2 Runtime QA Flag Structure/Information Content 3

> 2.1 Types of Runtime QA Flags 3
>
> 2.2 Reading and Interpreting Runtime QA Flags 5

Appendix A: **Runtime QA Flags** of Atmosphere Products 9

> Aerosol (04_L2) 10
>
> Water Vapor (05_L2) 16
>
> Cloud (06_L2) 19
>
> Cloud Optical Properties 19
>
> Cloud Top Properties 23
>
> Atmospheric Profile (07_L2) 27
>
> Cloud Mask (35_L2) 32
>
> Joint Atmosphere (ATML2) 36

Appendix B: **Inventory Metadata** of Atmosphere Products 40

> Introduction 41
>
> ECS (or Core) Inventory Metadata 41
>
> QA Inventory Metadata 43
>
> Aerosol (04_L2) 44
>
> Water Vapor (05_L2) 45
>
> Cloud (06_L2) 46
>
> Atmospheric Profile (07_L2) 47
>
> Cloud Mask (35_L2) 48
>
> Joint Atmosphere (ATML2) 49

Appendix C: **Archive Metadata** of Atmosphere Products 51

> Introduction 52
>
> Aerosol (04_L2) 53
>
> Water Vapor (05_L2) 54
>
> Cloud (06_L2) 55
>
> Atmospheric Profile (07_L2) 56
>
> Cloud Mask (35_L2) 57
>
> Joint Atmosphere (ATML2) 58
>
> Daily Global (08_D3) 59
>
> Eight Day Global (08_E3) 59
>
> Monthly Global (08_M3) 59

+-----------------------------------------------------------------------+
| **Note 1:** Changes for version 3.1 are isolated in the Aerosol QA    |
| flags and are shown in red.                                           |
|                                                                       |
| **Note 2:** Changes for version 3.4 are isolated in the Aerosol       |
| Cloud_Mask_QA and Aerosol Quality_Assurance_Land flags on pages 10    |
| and 12; and the Joint Product on page 39 (shown in green).            |
|                                                                       |
| **Note 3:** Changes for version 3.5 are isolated in the Deep Blue     |
| Aerosol portion of the Aerosol Quality_Assurance_Land flags on page   |
| 12; and the Joint Product on page 39 (shown in blue).                 |
+-----------------------------------------------------------------------+

**1.0 Introduction**

This document describes the QA (quality assessment or quality assurance)
plan for all MODIS Atmosphere products. Topics covered include: quality
evaluation approach and scenarios, Level 2 (L2) runtime QA structure and
information content, types of L2 runtime QA flags, a primer on reading
and interpreting L2 runtime QA flags, detail on how Level 2 (L2)
confidence flags impact Level 3 (L3) product statistics, and finally a
thorough breakdown of the structure and information content of L2
Runtime QA (in Appendix A).

Also included at the end of this document is information on Inventory
and Archive Metadata structures that apply to both L2 and L3 products
(in Appendix B and C).

It should be noted that within MODIS Atmosphere, the term "QA" is
loosely defined to include a wide variety of flags that detail (1)
confidence or quality, (2) retrieval processing path, (3) retrieval
status or outcome, (4) retrieval method, (5) data or scene
characteristics, and (6) metadata or ancillary input source.

Quality assessment is an important element in the sequential data
reduction from Level 0 (L0) raw counts to Level 1B (L1B) calibrated
radiance, and continually to Level 2 (L2) orbital swath granules and
Level 3 (L3) global gridded products. Level 2 MODIS Atmosphere products,
retrieved from MODIS instrument and ancillary data, are grouped into
user-friendly Hierarchical Data Format (HDF) files based upon the
general categories of aerosol, column water vapor, cloud, atmospheric
profiles, cloud mask, and joint atmosphere. Level 3 Atmosphere products,
which contain hundreds of 1°x1° global gridded parameters/statistics
derived from the L2 products, are grouped into HDF files by temporal
period: daily, eight-day, and monthly.

MODIS atmosphere products are grouped as follows (Earth Science Data
Type (ESDT) names, used to identify each product by their HDF filename,
are provided in parentheses):

***Level 2 Products***

-   Aerosol (04_L2)

-   Water Vapor (or Precipitable Water) (05_L2)

-   Cloud Properties (06_L2)

-   Atmospheric Profiles (07 \_L2)

-   Cloud Mask (35_L2)

-   Joint Atmosphere (ATML2)

***Level 3 Products***

-   Daily Global (08_D3)

-   Eight-day Global (08_E3)

-   Monthly Global (08_M3)

Each Level 2 atmospheric parameter is retrieved at a spatial resolution
determined by the sensitivity of retrieval, not necessarily on a single
field of view (FOV) basis. Resolutions typically range from 1x1 km to
10x10 km. Level 3 atmospheric parameters are computed at 1x1 degree
spatial resolution.

There are two main types of flags described in this document: (1.)
Runtime QA Flags and (2.) Metadata (either Inventory or Archive).

**Runtime QA Flags** (which are only computed and stored for Level 2
products) are designed to convey information on retrieval processing
path, input data source, scene characteristics, and the estimated
quality of the physical parameters retrieved. In addition, this broad
group of flags also includes Cloud Mask QA flags (initially derived at
11 km resolution) that may be recomputed at the spatial resolution of
the retrieval for the determination of cloudy and clear pixels, land
surface type, sunglint, day/night, and snow/ice.

**Metadata**, on the other hand, are to report high-level granule
characteristics and calculated statistics in the broad catagory of
either Inventory or Archive Metadata. Inventory Metadata are searchable,
whereas the Archive Metadata are for archival (documentation) only.

**1.1 QA Approach**

The (automatic) operational approach forms the key to the QA process of
MODIS atmosphere products. This encompasses the Runtime QA flags and
Metadata produced in each product as well as the operational procedures
performed in real time at the GDAAC (Goddard DAAC) or MODAPS (MODIS Data
Processing System).

The Runtime QA flags produced in Level 2 products are the central piece
of this Quality Assurance (QA) Plan. They are designed not only to
report success or failure of criteria being used in retrieval but also
to estimate the data quality. These resolution-level QA flags provide
much more detailed information and thus provide better information to
produce Level 3 global products. The MODIS atmosphere Level 3 products
are produced to include various statistical quantities (e.g., mean,
standard deviation, histogram and regression). Theoretically, in
evaluating the quality of the retrieval, the quality of the inputs
should also be considered. Thus, the Level 2 QA flags are to reflect
only the product itself, with input sources flagged for later
evaluation.

Introductory information on the type and structure of Runtime QA Flags,
along with a primer on reading and interpreting QA Flags, can be found
in Section 2. The key portion of this document is the detailed
tabulation of Runtime QA Flags in Appendix A.

**2.0 Level 2 Runtime QA Structure/Information Content**

The quality of Level 2 product can be (1) inherited from the L1B
radiances, or (2) associated with the retrieval process. The pixel-based
L1B validity flags comprising information on dead and saturated
detectors, calibration failure, etc., are examined by L2 algorithms for
determination of the radiometric status of each pixel. This information
can prevent further calculations from being performed if the "valid
input data" criteria is not met by the given algorithm. The
granule-level L1B QA metadata provides summary information for valid and
saturated Earth view observations, and can be useful in screening a
granule of data. Details about MODIS L1B QA flags can be found in the
MODIS L1B QA plan. The structure and information content of MODIS
Atmosphere runtime QA are detailed in the following sections.

It should be noted that Runtime QA flags are only found in Level 2 (L2)
Atmosphere products. Level 3 (L3) Atmosphere products contain no Runtime
QA flags (bit-string SDS's); however L2 runtime QA flags are used to
compute (aggregate and weight) statistics in L3.

**2.1 Types of Runtime QA Flags**

The SDS run time QA flags are stored based upon product resolution. For
convenience, the run time QA flags can be divided into three parts: (1)
cloud mask flags, (2) product quality flags, and (3) retrieval
processing flags.

**Cloud Mask Flags** are constructed using the Cloud Mask (35_L2).
Typically they are based on the flags from the first byte only, however
it may contain additional flags read from subsequent bytes. The first
byte of the Cloud Mask is shown below:

+---+---------------------------+-------+----------------------------+
| * | **Flag Name**             | **Bit | **Bit Value Definitions**  |
| * |                           | Val   |                            |
| B |                           | ues** |                            |
| i |                           |       |                            |
| t |                           |       |                            |
| s |                           |       |                            |
| * |                           |       |                            |
| * |                           |       |                            |
+---+---------------------------+-------+----------------------------+
| 0 | Cloud Mask Status Flag    | 0     | Undetermined               |
|   |                           |       |                            |
|   |                           | 1     | Determined                 |
+---+---------------------------+-------+----------------------------+
| 1 | Cloud Mask Cloudiness     | 0     | Confident Cloudy (or Fill, |
| - | Flag                      |       | if Status Flag = 0)        |
| 2 |                           | 1     |                            |
|   |                           |       | Probably Cloudy            |
|   |                           | 2     |                            |
|   |                           |       | Probably Clear             |
|   |                           | 3     |                            |
|   |                           |       | Confident Clear            |
+---+---------------------------+-------+----------------------------+
| 3 | Day / Night Flag          | 0     | Night (or Fill, if Status  |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | Day                        |
+---+---------------------------+-------+----------------------------+
| 4 | Sunglint Flag             | 0     | Yes (or Fill, if Status    |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | No                         |
+---+---------------------------+-------+----------------------------+
| 5 | Snow / Ice Flag           | 0     | Yes (or Fill, if Status    |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | No                         |
+---+---------------------------+-------+----------------------------+
| 6 | Surface Type Flag         | 0     | Ocean or Deep Lakes and    |
| - |                           |       | Rivers (or Fill)\          |
| 7 |                           | 1     | Coast or Shallow Lakes and |
|   |                           |       | Rivers                     |
|   |                           | 2     |                            |
|   |                           |       | Desert                     |
|   |                           | 3     |                            |
|   |                           |       | Land                       |
+---+---------------------------+-------+----------------------------+

For L2 products at 11 km resolution, the first byte of the cloud mask
will be written and stored, exactly as detailed above. For coarser
resolution products (5x5 or 10x10 km), the information for each QA Flag
will be determined by science team members based upon the retrieval
method (it may be subsampled or averaged). To avoid duplication in
products that are built from more than one retrieval algorithm, cloud
mask QA flags will be stored only once in each product (HDF file). The
only exception is the Cloud Product (06_L2), where the cloud mask QA
flags will be stored at both 11 and 55 km resolutions.

**Product Quality Flags** are used to indicate the quality of each
parameter retrieved at the product spatial resolution. The first bit
indicates usefulness of the parameter, followed by two or three bits for
the confidence level. Even though one can store a number from 0 to 7
(corresponding to 8 confidence levels) when three bits are allocated for
the Confidence Flag, the Atmosphere L3 production processing software
was develped to handle only 4 confidence levels (see table below), which
can be adequately stored in only two bits. Usefulness Flags should
always be read in tandum with Confidence Flags to differentiate between
No Confidence but valid data vs. Fill (missing) data.

An example of the typical format for Product Quality Flags is shown
below:

+--------------------+---+-------+---+--------------------+---+-------------------+
| **Flag Name**      |   | **Bit |   | **Bit Value        |   | **L3              |
|                    |   | Val   |   | Definitions**      |   | QA-weighting**    |
|                    |   | ues** |   |                    |   |                   |
+--------------------+---+-------+---+--------------------+---+-------------------+
| *Example           | 0 |       | N |                    | N |                   |
| Parameter*         |   |       | o |                    | o |                   |
|                    | 1 |       | t |                    | t |                   |
| Usefulness Flag    |   |       | u |                    | u |                   |
|                    |   |       | s |                    | s |                   |
|                    |   |       | e |                    | e |                   |
|                    |   |       | f |                    | d |                   |
|                    |   |       | u |                    | i |                   |
|                    |   |       | l |                    | n |                   |
|                    |   |       |   |                    | L |                   |
|                    |   |       | U |                    | 3 |                   |
|                    |   |       | s |                    |   |                   |
|                    |   |       | e |                    | U |                   |
|                    |   |       | f |                    | s |                   |
|                    |   |       | u |                    | e |                   |
|                    |   |       | l |                    | d |                   |
|                    |   |       |   |                    | i |                   |
|                    |   |       |   |                    | n |                   |
|                    |   |       |   |                    | L |                   |
|                    |   |       |   |                    | 3 |                   |
+--------------------+---+-------+---+--------------------+---+-------------------+
| *Example           | 0 |       | N |                    | 0 |                   |
| Parameter*         |   |       | o |                    | x |                   |
|                    | 1 |       | C |                    |   |                   |
| Confidence Flag    |   |       | o |                    | 1 |                   |
|                    | 2 |       | n |                    | x |                   |
|                    |   |       | f |                    |   |                   |
|                    | 3 |       | i |                    | 2 |                   |
|                    |   |       | d |                    | x |                   |
|                    |   |       | e |                    |   |                   |
|                    |   |       | n |                    | 3 |                   |
|                    |   |       | c |                    | x |                   |
|                    |   |       | e |                    |   |                   |
|                    |   |       | ( |                    |   |                   |
|                    |   |       | o |                    |   |                   |
|                    |   |       | r |                    |   |                   |
|                    |   |       | F |                    |   |                   |
|                    |   |       | i |                    |   |                   |
|                    |   |       | l |                    |   |                   |
|                    |   |       | l |                    |   |                   |
|                    |   |       | ) |                    |   |                   |
|                    |   |       |   |                    |   |                   |
|                    |   |       | M |                    |   |                   |
|                    |   |       | a |                    |   |                   |
|                    |   |       | r |                    |   |                   |
|                    |   |       | g |                    |   |                   |
|                    |   |       | i |                    |   |                   |
|                    |   |       | n |                    |   |                   |
|                    |   |       | a |                    |   |                   |
|                    |   |       | l |                    |   |                   |
|                    |   |       |   |                    |   |                   |
|                    |   |       | G |                    |   |                   |
|                    |   |       | o |                    |   |                   |
|                    |   |       | o |                    |   |                   |
|                    |   |       | d |                    |   |                   |
|                    |   |       |   |                    |   |                   |
|                    |   |       | V |                    |   |                   |
|                    |   |       | e |                    |   |                   |
|                    |   |       | r |                    |   |                   |
|                    |   |       | y |                    |   |                   |
|                    |   |       | G |                    |   |                   |
|                    |   |       | o |                    |   |                   |
|                    |   |       | o |                    |   |                   |
|                    |   |       | d |                    |   |                   |
+--------------------+---+-------+---+--------------------+---+-------------------+

The MODIS Atmosphere L3 processing software makes use of the L2
Usefulness and Confidence flags by creating L3 QA-weighted mean and
standard deviation statistics. The QA weighting is performed by
weighting each L2 input pixel by its Confidence flag, so that non-fill
*no confidence* data has a weight of 0x, *marginal* data has a weight of
1x, *good* data has a weight of 2x, and *very good* data has a weight of
3x in the statistical computation within the L3 one-degree grid box.

It should be noted that L3 "regular" (non QA-weighted) mean and standard
deviation statistics are not weighted by L2 Confidence flags and will
**include** all *non-fill* L2 input pixels that have their
Quality/Confidence flags set to 0; while the QA-weighted mean and
standard deviation statistics will **exclude** these pixels. This
technique allows for the creation of L3 (QA-weighted) statistics that
can selectively exclude *no confidence* (or experimental) L2 results.

Finally, users should note that (in addition to regular simple
statistics) L2 QA Confidence flags are also ignored in the L3
computation of pixel count, histogram, joint histogram, and regression
statistics.

**Retrieval Processing Flags** are used for miscellaneous purposes. The
bit length and information content are determined by the responsible
science team member. In general, it may contain:

-   Physical, algorithm, climatological constraints

-   Atmospheric correction (Rayleigh scattering, gaseous absorption)

-   Input resource of ancillary data or MODIS product

-   Spectral band and detector status (L1B)

-   Occurrence of contamination by thin cirrus

Two common retrieval processing flags are the processing path flag and
the input data resource flag. The former indicates the retrieval path,
the correction due to Rayleigh scattering and gaseous absorption, or the
occcurrence of error during retrieval. The latter is to indicate the
source of input data sets, such as other MODIS products, ancillary data
from other satellites, model assimilated data from GMAO (Goddard
Modeling and Assimilation Office), or NCEP (National Centers for
Environmental Prediction), or climatology.

2.  **Reading and Interpreting Runtime QA Flags**

All Level 2 (L2) MODIS Atmosphere HDF data products contain one or more
"bit flag"" Scientific Data Set (SDS) arrays. Bit flag SDS names may
contain the string "Quality_Assurance"" or may have a more descriptive
name like "Cloud_Mask". However, they all have one common attribute ---
bit flag (or bit string) arrays contain multiple flags stored in
particular (fixed) bit positions of the array.

**Bit and Byte Array Indexing Convention: "[Zero-based]{.underline}"**

The convention for indexing arrays varies from language to language.
Array indexing in FORTRAN typically starts at 1; and array indexing in C
typically starts at 0. However, almost all tools used for bit extraction
(in both FORTRAN and C) use an index start convention of 0 for both bits
and bytes. In addition, the HDF interface is based in the C (0-based)
language. Therefore a 0-based start convention for indexing (numbering)
the bits and bytes is always used. In summary, the first byte is always
called byte 0, and the first bit is always called bit 0.

**HDF Bit and Byte Array Ordering Convention: "[Big
Endian]{.underline}"**

***Background on "endian" nomenclature and its impact on bit string
dumps***

There are two schemes of byte (or bit) ordering used in computers: *big
endian* and *little endian*.

-   ***Little endian*** means that the [low-order]{.underline} byte (or
    bit) is stored in memory at the lowest (leftmost) address, and the
    high-order byte (or bit) at the highest (rightmost) address (in
    other words, the "little end" comes first.). Intel processors (those
    used in Windows PCs) use the *little endian* convention. This group
    also includes HP-UX and PC-based Linux.

-   ***Big endian*** means that the [high-order]{.underline} byte (or
    bit) is stored in memory at the lowest (leftmost) address, and the
    low-order byte at the highest (rightmost) address (in other words,
    the "big end" comes first.). Motorola processors (those used in
    Macintosh OS) use the *big endian* convention. This group also
    includes Sun OS and SGI/Irix.

If one uses a tool that dumps (displays) bit registers (e.g., 01001001)
of an HDF bit flag SDS array, one needs to keep in mind that standard
HDF data products (including all MODIS HDF data) are dumped (displayed)
using the ***big endian*** referencing scheme.

Since HDF is designed to be platform-independent, if the platform being
used is *little endian*, the HDF library will (automatically) convert
the bit and byte order of bit flag SDS arrays to *big endian*. On *big
endian* platforms, the HDF library will perform no byte-order conversion
since the array already in the correct form by default. Therefore, when
"stripping bits"" from *bit flag* SDSs (Quality Assurance or Cloud Mask
arrays, for example) using bit manipulation tools, the bits will
**always** be numbered from right (bit index #0) to left (bit index #7).
That is, the least significant bit (20) is on the right and most
significant bit (27) is on the left. A visual example of this format is
offered below.

![](media/image2.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}

***Numerical Whole-Byte Dumps***

Users should note that if one uses the HDF utility, *ncdump,* or other
tools to dump [full-byte values]{.underline} (numbers from 0 to 255)
from *bit flag* SDS arrays; one can recreate the *bit flags* using
**either** the *big* or *little* *endian* convention. One simply
converts the numbers to 8 bit registers of 0 or 1, where the bit tagged
as the first bit (bit index #0) is the lowest order (or least
significant) bit (20); and the bit tagged as the last bit (bit index #7)
is the highest order (or most significant) bit (27). In this case, it
doesn't matter which end (left or right) one places the least
significant (20) bit.

![](media/image2.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}![](media/image3.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}

To decode individual flags, one queries groups of sequential bits
(matching the length of each flag) in the proper bit order from 0 to 7
and interprets the value of those bits (using the same *least
significant* to *most significant* convention) to obtain the correct
flag value. An example of both of these (*bit flag* decoding) methods is
detailed below.

***Example: Interpreting the Cloud_Mask SDS (1st byte only)***

Consider the first byte of the (commonly used) Cloud_Mask SDS:

+---+---------------------------+-------+----------------------------+
| * | **Flag Name**             | **Bit | **Bit Value Definitions**  |
| * |                           | Val   |                            |
| B |                           | ues** |                            |
| i |                           |       |                            |
| t |                           |       |                            |
| s |                           |       |                            |
| * |                           |       |                            |
| * |                           |       |                            |
+---+---------------------------+-------+----------------------------+
| 0 | Cloud Mask                | 0     | Undetermined               |
|   |                           |       |                            |
|   | Status Flag               | 1     | Determined                 |
+---+---------------------------+-------+----------------------------+
| 1 | Cloud Mask                | 0     | Confident Cloudy (or Fill, |
| - |                           |       | if Status Flag = 0)        |
| 2 | Cloudiness Flag           | 1     |                            |
|   |                           |       | Probably Cloudy            |
|   |                           | 2     |                            |
|   |                           |       | Probably Clear             |
|   |                           | 3     |                            |
|   |                           |       | Confident Clear            |
+---+---------------------------+-------+----------------------------+
| 3 | Day / Night Flag          | 0     | Night (or Fill, if Status  |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | Day                        |
+---+---------------------------+-------+----------------------------+
| 4 | Sunglint Flag             | 0     | Yes (or Fill, if Status    |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | No                         |
+---+---------------------------+-------+----------------------------+
| 5 | Snow / Ice Flag           | 0     | Yes (or Fill, if Status    |
|   |                           |       | Flag = 0)                  |
|   |                           | 1     |                            |
|   |                           |       | No                         |
+---+---------------------------+-------+----------------------------+
| 6 | Surface Type Flag         | 0     | Ocean or Deep Lakes and    |
| - |                           |       | Rivers (or Fill)           |
| 7 |                           | 1     |                            |
|   |                           |       | Coast or Shallow Lakes and |
|   |                           | 2     | Rivers                     |
|   |                           |       |                            |
|   |                           | 3     | Desert                     |
|   |                           |       |                            |
|   |                           |       | Land                       |
+---+---------------------------+-------+----------------------------+

Suppose the following flags were set:

-   Cloud Mask Status = 1 (Determined)

-   Cloud Mask Cloudiness = 2 (Probably Clear)

-   Day/Night = 0 (Night)

-   Sunglint = 1 (No)

-   Snow/Ice = 1 (No)

-   Surface Type = 3 (Land)

***Bit-String Dump***

Stripping the bits using a bit manipulation tool would yield the results
shown below. Flags are then counted (positioned) from the right (*big
endian* convention); and least to most significant bits are ordered from
right to left for each flag.

![](media/image4.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}

***Numerical Whole-Byte Dump***

However if one uses the HDF dump utility, *ncdump,* or another tool to
dump the full-byte numeric value from the array, one gets a byte value
of **245** (for this particular case). One can then recreate the
individual bit flags using either the big or little Endian convention,
as long as one starts counting (indexing) the bits (and assigning flags)
from the least significant to the most significant bit.

![](media/image5.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}![](media/image6.jpeg){width="3.1256944444444446in"
height="1.3527777777777779in"}

**Appendix A:**

**Runtime QA Flags**

**of**

**Atmosphere Products**

**Aerosol Product: MOD04_L2 (Terra) & MYD04_L2 (Aqua)**

For the Aerosol product, the Runtime QA flags are stored in three
Scientific Data Sets (SDSs): *Cloud_Mask_QA*, *Quality_Assurance_Land*,
and *Quality_Assurance_Ocean*. *Cloud_Mask_QA* is a single byte SDS that
contains several cloud mask QA flags recomputed on a 10x10 km grid. This
recomputation is performed using specific numerical threshholds of
percentages of 1 km Cloud Mask pixels that meet certain criteria within
the Aerosol 10x10 km retrieval area (see "Bit Value Definitions" column
in the table below). So for each 10x10 km pixel, up to one hundred 1 km
Cloud Mask pixels are queried. It should be noted that in the previous
version of the QA Plan, the 2^nd^ flag in sequence below was incorrectly
documented, it is now correctly specified as being "Spares." All other
flags provide information on the processing (logic) path taken in the
aerosol retrieval algorithm.

*Quality_Assurance_Land* and *Quality_Assurance_Ocean* are five byte
SDSs that contain product quality flags, retrieval processing flags, and
input data resource flags designed separately for land and ocean because
of differences in the retrieval algorithms. All Aerosol QA Flag arrays
have the following characteristics:

-   Spatial resolution: 10x10 km

-   Processing mode: Daytime only

+-------------------+---+---------+---+-------+---+-----------------------------+
| #                 |   |         |   |       |   |                             |
| # *Scientific Dat |   |         |   |       |   |                             |
| a Set (SDS) Name: |   |         |   |       |   |                             |
|  "Cloud_Mask_QA"* |   |         |   |       |   |                             |
|                   |   |         |   |       |   |                             |
| *Description**:   |   |         |   |       |   |                             |
| Cloud mask QA     |   |         |   |       |   |                             |
| flags recomputed  |   |         |   |       |   |                             |
| at 10x10 km       |   |         |   |       |   |                             |
| resolution***     |   |         |   |       |   |                             |
|                   |   |         |   |       |   |                             |
| *Length**: 1 byte |   |         |   |       |   |                             |
| (8 bits)***       |   |         |   |       |   |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| **Flag Name**     |   | *       |   | **Bit |   | **Bit Value Definitions**   |
|                   |   | *Number |   | Val   |   |                             |
|                   |   | of      |   | ues** |   |                             |
|                   |   | Bits**  |   |       |   |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Cloud Mask        | 1 |         | 0 |       | U |                             |
| Summary Flag      |   |         |   |       | n |                             |
|                   |   |         | 1 |       | d |                             |
| from internal     |   |         |   |       | e |                             |
| 04_L2 Cloud Mask  |   |         |   |       | t |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | m |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | \ |                             |
|                   |   |         |   |       | < |                             |
|                   |   |         |   |       | 1 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | ) |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | D |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | m |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | 1 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | ) |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Cloud Mask        | 2 |         | 0 |       | 0 |                             |
| Quality Flag      |   |         |   |       | % |                             |
|                   |   |         | 1 |       | t |                             |
| from internal     |   |         |   |       | o |                             |
| 04_L2 Cloud Mask  |   |         | 2 |       | 3 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         | 3 |       | % |                             |
|                   |   |         |   |       | C |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | 3 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | 6 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | C |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | 6 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | 9 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | C |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | \ |                             |
|                   |   |         |   |       | > |                             |
|                   |   |         |   |       | 9 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | C |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | u |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | y |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Spare             | 1 |         |   |       | T |                             |
|                   |   |         |   |       | B |                             |
|                   |   |         |   |       | D |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Snow / Ice Flag   | 1 |         | 0 |       | Y |                             |
|                   |   |         |   |       | e |                             |
| from 35_L2 Cloud  |   |         | 1 |       | s |                             |
| Mask              |   |         |   |       | ( |                             |
|                   |   |         |   |       | ≥ |                             |
|                   |   |         |   |       | 9 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | w |                             |
|                   |   |         |   |       | / |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | ) |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | N |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | \ |                             |
|                   |   |         |   |       | < |                             |
|                   |   |         |   |       | 9 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | w |                             |
|                   |   |         |   |       | / |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | x |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | ) |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Surface Type Flag | 2 |         | 0 |       | O |                             |
|                   |   |         |   |       | c |                             |
| from 35_L2 Cloud  |   |         | 1 |       | e |                             |
| Mask              |   |         |   |       | a |                             |
|                   |   |         | 2 |       | n |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         | 3 |       | ≥ |                             |
|                   |   |         |   |       | 9 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | p |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | k |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | v |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | ) |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | C |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | h |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | c |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | i |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | o |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | m |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | ) |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | D |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | 1 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | ) |                             |
|                   |   |         |   |       |   |                             |
|                   |   |         |   |       | L |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | ( |                             |
|                   |   |         |   |       | 1 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | l |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | a |                             |
|                   |   |         |   |       | n |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | \ |                             |
|                   |   |         |   |       | < |                             |
|                   |   |         |   |       | 1 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | 0 |                             |
|                   |   |         |   |       | % |                             |
|                   |   |         |   |       | d |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | s |                             |
|                   |   |         |   |       | e |                             |
|                   |   |         |   |       | r |                             |
|                   |   |         |   |       | t |                             |
|                   |   |         |   |       | ) |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+
| Spare             | 1 |         |   |       | T |                             |
|                   |   |         |   |       | B |                             |
|                   |   |         |   |       | D |                             |
+-------------------+---+---------+---+-------+---+-----------------------------+

+---+-------------------+---------+-------+------------------------------+---+
| # |                   |         |       |                              |   |
| # |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| S |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| f |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| D |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| S |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| ( |                   |         |       |                              |   |
| S |                   |         |       |                              |   |
| D |                   |         |       |                              |   |
| S |                   |         |       |                              |   |
| ) |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| N |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| m |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| : |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| " |                   |         |       |                              |   |
| Q |                   |         |       |                              |   |
| u |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| l |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| y |                   |         |       |                              |   |
| _ |                   |         |       |                              |   |
| A |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| u |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| _ |                   |         |       |                              |   |
| L |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| d |                   |         |       |                              |   |
| " |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| D |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| p |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| o |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| : |                   |         |       |                              |   |
| P |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| o |                   |         |       |                              |   |
| d |                   |         |       |                              |   |
| u |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| q |                   |         |       |                              |   |
| u |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| l |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| y |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| d |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
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| v |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| l |                   |         |       |                              |   |
| p |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| o |                   |         |       |                              |   |
| c |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| f |                   |         |       |                              |   |
| l |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| o |                   |         |       |                              |   |
| v |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| r |                   |         |       |                              |   |
| L |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| d |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| L |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| h |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| : |                   |         |       |                              |   |
| 5 |                   |         |       |                              |   |
| b |                   |         |       |                              |   |
| y |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| ( |                   |         |       |                              |   |
| 4 |                   |         |       |                              |   |
| 0 |                   |         |       |                              |   |
| b |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| ) |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
| * |                   | *       | **Bit | **Bit Value Definitions**    |   |
| * |                   | *Number | Val   |                              |   |
| F |                   | of      | ues** |                              |   |
| l |                   | Bits**  |       |                              |   |
| a |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| N |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| m |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | 0.47 µm Aerosol   | 1       | 0     | Not useful                   |   |
|   | Optical Thickness |         |       |                              |   |
|   | Usefulness Flag   |         | 1     | Useful                       |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | 0.47 µm Aerosol   | 3       | 0     | No Confidence (or Fill)      |   |
|   | Optical Thickness |         |       |                              |   |
|   | Confidence Flag   |         | 1     | Marginal                     |   |
|   |                   |         |       |                              |   |
|   |                   |         | 2     | ###### Good                  |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Very Good                    |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | 0.66 µm Aerosol   | 1       | 0     | Not useful                   |   |
|   | Optical Thickness |         |       |                              |   |
|   | Usefulness Flag   |         | 1     | Useful                       |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | 0.66 µm Aerosol   | 3       | 0     | No Confidence (or Fill)      |   |
|   | Optical Thickness |         |       |                              |   |
|   | Confidence Flag   |         | 1     | Marginal                     |   |
|   |                   |         |       |                              |   |
|   |                   |         | 2     | Good                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Very Good                    |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | #### proc         |         |       |                              |   |
|   | essing path flags |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Dark Target       | 3       | 0     | not met (Fill Value)         |   |
|   | Criteria          |         |       |                              |   |
|   |                   |         | 1     | 0.01 \< *Ref* (2.1 µm) ≤     |   |
|   | used in retrieval |         |       | 0.05                         |   |
|   |                   |         | 2     |                              |   |
|   |                   |         |       | 0.05 \< *Ref* (2.1 µm) ≤     |   |
|   |                   |         | 3     | 0.10                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 4     | 0.10 \< *Ref* (2.1 µm) ≤     |   |
|   |                   |         |       | 0.15                         |   |
|   |                   |         | 5     |                              |   |
|   |                   |         |       | 0.15 \< *Ref* (2.1 µm) ≤     |   |
|   |                   |         |       | 0.25                         |   |
|   |                   |         |       |                              |   |
|   |                   |         |       | 0.25 \< *Ref* (2.1 µm) ≤     |   |
|   |                   |         |       | 0.40                         |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Error Code        | 3       | 0     | No error                     |   |
|   |                   |         |       |                              |   |
|   | (when Fill Values |         | 1     | Solar and illumination       |   |
|   | are assigned)     |         |       | angles out-of-bounds in      |   |
|   |                   |         | 2     | look-up table                |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Apparent reflectance         |   |
|   |                   |         |       | out-of-bounds in look-up     |   |
|   |                   |         | 4     | table                        |   |
|   |                   |         |       |                              |   |
|   |                   |         | 5     | Number of cloud and water    |   |
|   |                   |         |       | free pixels not met          |   |
|   |                   |         | 6     |                              |   |
|   |                   |         |       | Thresholds of 2.1 µm not met |   |
|   |                   |         |       |                              |   |
|   |                   |         |       | Thresholds of 3.8 µm not met |   |
|   |                   |         |       |                              |   |
|   |                   |         |       | Thin cirrus detection not    |   |
|   |                   |         |       | met                          |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | High Solar Zenith | 1       | 0     | No                           |   |
|   | Angle ( \> 72° )  |         |       |                              |   |
|   |                   |         | 1     | Yes                          |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Increased Spatial | 1       | 0     | No                           |   |
|   | Resolution        |         |       |                              |   |
|   |                   |         | 1     | Yes                          |   |
|   | ( 5x5 km )        |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | ######            | 2       | 0     | # Mixed                      |   |
|   | ### Aerosol Type  |         |       |                              |   |
|   |                   |         | 1     | Dust                         |   |
|   | #########         |         |       |                              |   |
|   |  (over Land only) |         | 2     | Sulfate                      |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Smoke                        |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Thin Cirrus or    | 2       | 0     | 0 \< (1.38 µm) \< 0.01;      |   |
|   |                   |         |       | Correction is done           |   |
|   | Stratospheric     |         | 1     |                              |   |
|   | Aerosol Index     |         |       | (1.38 µm) \< 0; No           |   |
|   |                   |         | 2     | correction                   |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | (0.66 µm) \< 0.04; No        |   |
|   |                   |         |       | correction                   |   |
|   |                   |         |       |                              |   |
|   |                   |         |       | (1.38 µm) \> 0.01; No        |   |
|   |                   |         |       | correction                   |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | ***input data     |         |       |                              |   |
|   | resource flags*** |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Total ozone       | 2       | 0     | TOVS                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 1     | TOMS                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 2     | Climatology                  |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | GMAO                         |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Total             | 2       | 0     | NCEP / GDAS                  |   |
|   | Precipitable      |         |       |                              |   |
|   | Water             |         | 1     | MOD05\* NIR (MODIS Near-IR   |   |
|   |                   |         |       | Water Vapor Retrieval)       |   |
|   |                   |         | 2     |                              |   |
|   |                   |         |       | Climatology                  |   |
|   |                   |         | 3     |                              |   |
|   |                   |         |       | GMAO                         |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Snow Cover        | 2       | 0     | MOD35\* (MODIS Cloud Mask)   |   |
|   |                   |         |       |                              |   |
|   |                   |         | 1     | MOD10\* (MODIS Eight-day     |   |
|   |                   |         |       | Snow Cover)                  |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Spares            | 6       |       | TBD                          |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 1       | 0     | Not useful                   |   |
|   |                   |         |       |                              |   |
|   | Usefulness Flag   |         | 1     | Useful                       |   |
|   | ^\$^              |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | No Confidence (or Fill)      |   |
|   |                   |         |       |                              |   |
|   | Confidence Flag   |         | 1     | Marginal                     |   |
|   | ^\$^              |         |       |                              |   |
|   |                   |         | 2     | ###### Good                  |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Very Good                    |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | Mixed                        |   |
|   | Type ^\$^         |         |       |                              |   |
|   |                   |         | 1     | Dust                         |   |
|   | *Note: Flags 2    |         |       |                              |   |
|   | and 3 are         |         | 2     | ###### Smoke                 |   |
|   | reversed from the |         |       |                              |   |
|   | Aerosol Type      |         | 3     | ###### Sulfate               |   |
|   | (over land only)  |         |       |                              |   |
|   | above*            |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | Optimal Retrieval Performed  |   |
|   |                   |         |       |                              |   |
|   | Retrieving        |         | 1     | White Sand                   |   |
|   | Condition ^\$^    |         |       |                              |   |
|   |                   |         | 2     | Cloudy                       |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | (550 nm) \> 5.0 (Out of      |   |
|   |                   |         |       | Bounds)                      |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Spare             | 1       |       | ###### TBD                   |   |
+---+-------------------+---------+-------+------------------------------+---+

\* MOD prefix denotes MODIS/Terra (AM overpass) data \-- MYD prefix
should be substituted for MODIS/Aqua (PM overpass) data

^\$^ Implemented in PGE04 versions 5.3.0 and later (Initially
implemented in the Collection 005 Aqua reprocess)

+---+-------------------+---------+-------+------------------------------+
| # |                   |         |       |                              |
| # |                   |         |       |                              |
|   |                   |         |       |                              |
| * |                   |         |       |                              |
| S |                   |         |       |                              |
| c |                   |         |       |                              |
| i |                   |         |       |                              |
| e |                   |         |       |                              |
| n |                   |         |       |                              |
| t |                   |         |       |                              |
| i |                   |         |       |                              |
| f |                   |         |       |                              |
| i |                   |         |       |                              |
| c |                   |         |       |                              |
|   |                   |         |       |                              |
| D |                   |         |       |                              |
| a |                   |         |       |                              |
| t |                   |         |       |                              |
| a |                   |         |       |                              |
|   |                   |         |       |                              |
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| t |                   |         |       |                              |
|   |                   |         |       |                              |
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| D |                   |         |       |                              |
| S |                   |         |       |                              |
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| * |                   |         |       |                              |
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| a |                   |         |       |                              |
| l |                   |         |       |                              |
| i |                   |         |       |                              |
| t |                   |         |       |                              |
| y |                   |         |       |                              |
| a |                   |         |       |                              |
| n |                   |         |       |                              |
| d |                   |         |       |                              |
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| r |                   |         |       |                              |
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| c |                   |         |       |                              |
| e |                   |         |       |                              |
| s |                   |         |       |                              |
| s |                   |         |       |                              |
| i |                   |         |       |                              |
| n |                   |         |       |                              |
| g |                   |         |       |                              |
| f |                   |         |       |                              |
| l |                   |         |       |                              |
| a |                   |         |       |                              |
| g |                   |         |       |                              |
| s |                   |         |       |                              |
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| r |                   |         |       |                              |
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| c |                   |         |       |                              |
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| a |                   |         |       |                              |
| n |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
|   |                   |         |       |                              |
| * |                   |         |       |                              |
| L |                   |         |       |                              |
| e |                   |         |       |                              |
| n |                   |         |       |                              |
| g |                   |         |       |                              |
| t |                   |         |       |                              |
| h |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
| : |                   |         |       |                              |
| 5 |                   |         |       |                              |
| b |                   |         |       |                              |
| y |                   |         |       |                              |
| t |                   |         |       |                              |
| e |                   |         |       |                              |
| s |                   |         |       |                              |
| ( |                   |         |       |                              |
| 4 |                   |         |       |                              |
| 0 |                   |         |       |                              |
| b |                   |         |       |                              |
| i |                   |         |       |                              |
| t |                   |         |       |                              |
| s |                   |         |       |                              |
| ) |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
| * |                   | *       | **Bit | **Bit Value Definitions**    |
| * |                   | *Number | Val   |                              |
| F |                   | of      | ues** |                              |
| l |                   | Bits**  |       |                              |
| a |                   |         |       |                              |
| g |                   |         |       |                              |
| N |                   |         |       |                              |
| a |                   |         |       |                              |
| m |                   |         |       |                              |
| e |                   |         |       |                              |
| * |                   |         |       |                              |
| * |                   |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | Aerosol           | 1       | 0     | Not useful                   |
|   | Parameters (Best  |         |       |                              |
|   | Soln.)            |         | 1     | Useful                       |
|   |                   |         |       |                              |
|   | Usefulness Flag   |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | Aerosol           | 3       | 0     | No Confidence (or Fill)      |
|   | Parameters (Best  |         |       |                              |
|   | Soln.)            |         | 1     | Marginal                     |
|   |                   |         |       |                              |
|   | Confidence Flag   |         | 2     | Good                         |
|   |                   |         |       |                              |
|   |                   |         | 3     | Very Good                    |
+---+-------------------+---------+-------+------------------------------+
|   | Aerosol           | 1       | 0     | Not useful                   |
|   | Parameters (Avg.  |         |       |                              |
|   | Soln.)            |         | 1     | Useful                       |
|   |                   |         |       |                              |
|   | Usefulness Flag   |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | Aerosol           | 3       | 0     | No Confidence (or Fill)      |
|   | Parameters (Avg.  |         |       |                              |
|   | Soln.)            |         | 1     | Marginal                     |
|   |                   |         |       |                              |
|   | Confidence Flag   |         | 2     | Good                         |
|   |                   |         |       |                              |
|   |                   |         | 3     | Very Good                    |
+---+-------------------+---------+-------+------------------------------+
|   | ***processing     |         |       |                              |
|   | path flags***     |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | Part I: Aerosol   | 4       | 0     | Retrieval is performed       |
|   | over Ocean        |         |       |                              |
|   | Retrieving        |         | 1     | Glitter is present           |
|   | Condition when    |         |       |                              |
|   | inversion is NOT  |         | 2     | Cloudy                       |
|   | performed.        |         |       |                              |
|   |                   |         | 3     | *R* (0.865 µm) too low for   |
|   | *Note:* *(550 nm) |         |       | retrieving optical thickness |
|   | **fill value**    |         | 4     |                              |
|   | will be output on |         |       | Total number of available    |
|   | conditions 1      |         | 5     | VIS / SWIR wavelength bands  |
|   | through 10.*      |         |       | (from 550 to 1240 nm) is     |
|   |                   |         | 6     | insufficient                 |
|   |                   |         |       |                              |
|   |                   |         | 7     | Total number of available    |
|   |                   |         |       | wavelengths \< 3             |
|   |                   |         | 8     |                              |
|   |                   |         |       | Angles Out-of-Bounds         |
|   |                   |         | 9     |                              |
|   |                   |         |       | Land present in 10 x 10 km   |
|   |                   |         | 10    | box                          |
|   |                   |         |       |                              |
|   |                   |         |       | 550 nm) \< -0.01; algorithm  |
|   |                   |         |       | found negative values of     |
|   |                   |         |       | optical thickness (there is  |
|   |                   |         |       | a problem)                   |
|   |                   |         |       |                              |
|   |                   |         |       | 550 nm) \> 5.0; out of       |
|   |                   |         |       | bounds in lookup table       |
|   |                   |         |       |                              |
|   |                   |         |       | All Channels do not have     |
|   |                   |         |       | valid data                   |
+---+-------------------+---------+-------+------------------------------+
|   | Part II: Aerosol  | 4       | 0     | Retrieval performed normally |
|   | over Ocean        |         |       |                              |
|   | Retrieving        |         | 1     | Number of useful pixels      |
|   | Condition when    |         |       | within 10 x 10 km box is \<  |
|   | inversion IS      |         | 2     | 10%                          |
|   | performed.        |         |       |                              |
|   |                   |         | 3     | *R* (0.865 µm) low but large |
|   | *Note*: *(550 nm) |         |       | enough for retrieving        |
|   | **retrieved       |         | 4     | optical thickness; the size  |
|   | value** will be   |         |       | distribution is              |
|   | output.on         |         | 5     | questionable;                |
|   | conditions 0      |         |       |                              |
|   | through 10.*      |         | 6     | > = fill value               |
|   |                   |         |       |                              |
|   | *Confidence Flag  |         | 7     | 1.65 µm channel not used     |
|   | Notes:*           |         |       |                              |
|   |                   |         | 8     | 2.13 µm channel not used     |
|   | -   *If           |         |       |                              |
|   |     Retrieving    |         | 9     | 1.65 and 2.13 µm channels    |
|   |     Condition =   |         |       | not used                     |
|   |     0, then       |         | 10    |                              |
|   |     Confidence.   |         |       | Aerosol type as well as      |
|   |     Flag is set   |         | 11    | aerosol content are variable |
|   |     to Very       |         |       |                              |
|   |     Good.*        |         |       | There is variability in      |
|   |                   |         |       | aerosol content but the      |
|   | -   *If = 7, then |         |       | spectral dependence is       |
|   |     Confidence    |         |       | stable                       |
|   |     Flag is set   |         |       |                              |
|   |     to Good.*     |         |       | The best value of is larger  |
|   |                   |         |       | than the threshold value     |
|   | -   *If = 1, 3,   |         |       | (5%)                         |
|   |     4, 6, 8 or    |         |       |                              |
|   |     10, then      |         |       | 550 nm) \< 0 to avoid bias   |
|   |     Confidence    |         |       | in level 3 product           |
|   |     Flag is set   |         |       |                              |
|   |     to Marginal.* |         |       | Glint angle between 30° and  |
|   |                   |         |       | 40°                          |
|   | -   *If = 2, 5,   |         |       |                              |
|   |     or 9, then    |         |       | Glint; Store only Refl., SD, |
|   |     Confidence    |         |       | and Number of Pixels Used    |
|   |     Flag is set   |         |       |                              |
|   |     to No         |         |       |                              |
|   |     Confidence.*  |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | ***input data     |         |       |                              |
|   | resource flags*** |         |       |                              |
+---+-------------------+---------+-------+------------------------------+
|   | Total Ozone       | 2       | 0     | TOMS                         |
|   |                   |         |       |                              |
|   |                   |         | 1     | TOVS                         |
|   |                   |         |       |                              |
|   |                   |         | 2     | GMAO                         |
|   |                   |         |       |                              |
|   |                   |         | 3     | Climatology                  |
+---+-------------------+---------+-------+------------------------------+
|   | Total             | 2       | 0     | NCEP                         |
|   | Precipitable      |         |       |                              |
|   | Water             |         | 1     | MOD05\* NIR (MODIS Near-IR   |
|   |                   |         |       | Water Vapor Retrieval)       |
|   |                   |         | 2     |                              |
|   |                   |         |       | GMAO                         |
|   |                   |         | 3     |                              |
|   |                   |         |       | MOD05\* IR (MODIS IR Water   |
|   |                   |         |       | Vapor Retrieval)             |
+---+-------------------+---------+-------+------------------------------+
|   | Snow Cover        | 2       | 0     | No snow detected             |
|   |                   |         |       |                              |
|   |                   |         | 1     | MOD35\* (MODIS Cloud Mask)   |
|   |                   |         |       |                              |
|   |                   |         | 2     | MOD10\* (MODIS Eight-day     |
|   |                   |         |       | Snow Cover)                  |
|   |                   |         | 3     |                              |
|   |                   |         |       | Other                        |
+---+-------------------+---------+-------+------------------------------+
|   | Spares            | 2       |       | TBD                          |
+---+-------------------+---------+-------+------------------------------+
|   | Spares            | 8       |       | TBD                          |
+---+-------------------+---------+-------+------------------------------+
|   | Spares            | 8       |       | TBD                          |
+---+-------------------+---------+-------+------------------------------+

\* MOD prefix denotes MODIS/Terra (AM overpass) data \-- MYD prefix
should be substituted for MODIS/Aqua (PM overpass) data

+---+-------------------------------+--------------------------------+---+
|   | ## *S                         |                                |   |
|   | ample Runtime QA Flag Images* |                                |   |
|   |                               |                                |   |
|   | ## *from the Aerosol Product* |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Aerosol Optical       |   |
| R |                               | Thickness (0.47 µm)            |   |
| e |                               | Usefulness"*                   |   |
| f |                               |                                |   |
| e |                               | ![](media/image8.wmf)          |   |
| r |                               |                                |   |
| e |                               | *SDS =                         |   |
| n |                               | "Quality_Assurance_Land"       |   |
| c |                               | (Aerosol over Land)*           |   |
| e |                               |                                |   |
| L |                               |                                |   |
| 1 |                               |                                |   |
| B |                               |                                |   |
| I |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| o |                               |                                |   |
| f |                               |                                |   |
| S |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| n |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 2 |                               |                                |   |
| F |                               |                                |   |
| e |                               |                                |   |
| b |                               |                                |   |
| 2 |                               |                                |   |
| 0 |                               |                                |   |
| 0 |                               |                                |   |
| 1 |                               |                                |   |
| 1 |                               |                                |   |
| 5 |                               |                                |   |
| : |                               |                                |   |
| 1 |                               |                                |   |
| 0 |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 7 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| M |                               |                                |   |
| O |                               |                                |   |
| D |                               |                                |   |
| I |                               |                                |   |
| S |                               |                                |   |
| T |                               |                                |   |
| e |                               |                                |   |
| r |                               |                                |   |
| r |                               |                                |   |
| a |                               |                                |   |
| ( |                               |                                |   |
| A |                               |                                |   |
| M |                               |                                |   |
| ) |                               |                                |   |
| R |                               |                                |   |
| : |                               |                                |   |
| G |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| = |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 1 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 4 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 3 |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Aerosol Type Flag     |   |
| F |                               | (over Land only)"*             |   |
| l |                               |                                |   |
| a |                               | ![](media/image10.wmf)         |   |
| g |                               |                                |   |
| = |                               | *SDS =                         |   |
| " |                               | "Quality_Assurance_Land"       |   |
| S |                               | (Aerosol over Land)*           |   |
| u |                               |                                |   |
| r |                               |                                |   |
| f |                               |                                |   |
| a |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| T |                               |                                |   |
| y |                               |                                |   |
| p |                               |                                |   |
| e |                               |                                |   |
| F |                               |                                |   |
| l |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| " |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 9 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| _ |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| _ |                               |                                |   |
| Q |                               |                                |   |
| A |                               |                                |   |
| " |                               |                                |   |
| ( |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Part I: Aerosol over  |   |
| F |                               | Ocean Retrieving Condition"*   |   |
| l |                               |                                |   |
| a |                               | ![](media/image12.wmf)         |   |
| g |                               |                                |   |
| = |                               | *SDS =                         |   |
| " |                               | "Quality_Assurance_Ocean"      |   |
| S |                               | (Aerosol over Ocean)*          |   |
| u |                               |                                |   |
| n |                               |                                |   |
| g |                               |                                |   |
| l |                               |                                |   |
| i |                               |                                |   |
| n |                               |                                |   |
| t |                               |                                |   |
| F |                               |                                |   |
| l |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| " |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 1 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| _ |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| _ |                               |                                |   |
| Q |                               |                                |   |
| A |                               |                                |   |
| " |                               |                                |   |
| ( |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+

Note: Images were created by "bitflag_visualizer", available at
<http://modis-atmos.gsfc.nasa.gov/tools_bitflag_visualizer.html>.

**Water Vapor Product: MOD05_L2 (Terra) & MYD05_L2 (Aqua)**

The Water Vapor (or Total Precipitable Water) product combines results
from both the NIR (11 km) and IR algorithms (5 5 km). For near infrared
(NIR) total precipitable water, the first byte contains cloud mask QA (1
1 km), and the second byte (a separate array from the cloud mask QA)
contains NIR product quality and retrieval processing flags. For the
five bytes of IR total precipitable water results, only product quality
and retrieval processing flags are stored. Since IR total precipitable
water results are copied from 07_L2, the cloud mask related QA flags can
be retrieved from 07_L2, and therefore it will not be duplicated here in
the 05_L2 product. All Water Vapor QA Flag arrays have the following
characteristics:

-   Spatial resolution: 1 1 km (NIR) and 5 5 km (IR)

-   **Processing mode: Daytime only (NIR) and Both Day and Night (IR)**

+--------------------+---+---------+---+-------+---+------------------------------+
| ## *Scienti        |   |         |   |       |   |                              |
| fic Data Set (SDS) |   |         |   |       |   |                              |
| : "Cloud_Mask_QA"* |   |         |   |       |   |                              |
|                    |   |         |   |       |   |                              |
| *Description**:    |   |         |   |       |   |                              |
| Cloud mask QA      |   |         |   |       |   |                              |
| flags at 1x1 km    |   |         |   |       |   |                              |
| ***                |   |         |   |       |   |                              |
|                    |   |         |   |       |   |                              |
| *Length**: 1 byte  |   |         |   |       |   |                              |
| (8 bits)***        |   |         |   |       |   |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| **Flag Name**      |   | *       |   | **Bit |   | **Bit Value Definitions**    |
|                    |   | *Number |   | Val   |   |                              |
|                    |   | of      |   | ues** |   |                              |
|                    |   | Bits**  |   |       |   |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Cloud Mask Status  | 1 |         | 0 |       | U |                              |
| Flag               |   |         |   |       | n |                              |
|                    |   |         | 1 |       | d |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | m |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | D |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | m |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | d |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Cloud Mask         | 2 |         | 0 |       | C |                              |
| Cloudiness Flag    |   |         |   |       | o |                              |
|                    |   |         | 1 |       | n |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         | 2 |       | i |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         | 3 |       | e |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       | y |                              |
|                    |   |         |   |       | ( |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | , |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         |   |       | S |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | g |                              |
|                    |   |         |   |       | = |                              |
|                    |   |         |   |       | 0 |                              |
|                    |   |         |   |       | ) |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | P |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | b |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | b |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | y |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       | y |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | P |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | b |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | b |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | y |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | r |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Day / Night Flag   | 1 |         | 0 |       | N |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         | 1 |       | g |                              |
|                    |   |         |   |       | h |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | ( |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | , |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         |   |       | S |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | g |                              |
|                    |   |         |   |       | = |                              |
|                    |   |         |   |       | 0 |                              |
|                    |   |         |   |       | ) |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | D |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | y |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Sunglint Flag      | 1 |         | 0 |       | Y |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         | 1 |       | s |                              |
|                    |   |         |   |       | ( |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | , |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         |   |       | S |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | g |                              |
|                    |   |         |   |       | = |                              |
|                    |   |         |   |       | 0 |                              |
|                    |   |         |   |       | ) |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | N |                              |
|                    |   |         |   |       | o |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Snow / Ice Flag    | 1 |         | 0 |       | Y |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         | 1 |       | s |                              |
|                    |   |         |   |       | ( |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | , |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | f |                              |
|                    |   |         |   |       | S |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | u |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | g |                              |
|                    |   |         |   |       | = |                              |
|                    |   |         |   |       | 0 |                              |
|                    |   |         |   |       | ) |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | N |                              |
|                    |   |         |   |       | o |                              |
+--------------------+---+---------+---+-------+---+------------------------------+
| Surface Type Flag  | 2 |         | 0 |       | O |                              |
|                    |   |         |   |       | c |                              |
|                    |   |         | 1 |       | e |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         | 2 |       | n |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         | 3 |       | r |                              |
|                    |   |         |   |       | D |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | p |                              |
|                    |   |         |   |       | L |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | k |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       | R |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | v |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | ( |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | F |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | ) |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | C |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | S |                              |
|                    |   |         |   |       | h |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | l |                              |
|                    |   |         |   |       | o |                              |
|                    |   |         |   |       | w |                              |
|                    |   |         |   |       | L |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | k |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | d |                              |
|                    |   |         |   |       | R |                              |
|                    |   |         |   |       | i |                              |
|                    |   |         |   |       | v |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | D |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | s |                              |
|                    |   |         |   |       | e |                              |
|                    |   |         |   |       | r |                              |
|                    |   |         |   |       | t |                              |
|                    |   |         |   |       |   |                              |
|                    |   |         |   |       | L |                              |
|                    |   |         |   |       | a |                              |
|                    |   |         |   |       | n |                              |
|                    |   |         |   |       | d |                              |
+--------------------+---+---------+---+-------+---+------------------------------+

+-------------------+---+---------+---+-------+---+------------------------------+
| ## *Scientific    |   |         |   |       |   |                              |
|  Data Set (SDS):  |   |         |   |       |   |                              |
| "Quality_Assuranc |   |         |   |       |   |                              |
| e_Near_Infrared"* |   |         |   |       |   |                              |
|                   |   |         |   |       |   |                              |
| ## *D             |   |         |   |       |   |                              |
| escription: Produ |   |         |   |       |   |                              |
| ct quality and re |   |         |   |       |   |                              |
| trieval processin |   |         |   |       |   |                              |
| g flags for Preci |   |         |   |       |   |                              |
| pitable Water (Ne |   |         |   |       |   |                              |
| ar IR) at 1x1 km* |   |         |   |       |   |                              |
|                   |   |         |   |       |   |                              |
| *Length: **1 byte |   |         |   |       |   |                              |
| (8 bits)***       |   |         |   |       |   |                              |
+-------------------+---+---------+---+-------+---+------------------------------+
| **Flag Name**     |   | *       |   | **Bit |   | **Bit Value Definitions**    |
|                   |   | *Number |   | Val   |   |                              |
|                   |   | of      |   | ues** |   |                              |
|                   |   | Bits**  |   |       |   |                              |
+-------------------+---+---------+---+-------+---+------------------------------+
| Total             | 1 |         | 0 |       | N |                              |
| Precipitable      |   |         |   |       | o |                              |
| Water (NIR)       |   |         | 1 |       | t |                              |
| Usefulness Flag   |   |         |   |       | u |                              |
|                   |   |         |   |       | s |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | f |                              |
|                   |   |         |   |       | u |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | U |                              |
|                   |   |         |   |       | s |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | f |                              |
|                   |   |         |   |       | u |                              |
|                   |   |         |   |       | l |                              |
+-------------------+---+---------+---+-------+---+------------------------------+
| Total             | 3 |         | 0 |       | B |                              |
| Precipitable      |   |         |   |       | a |                              |
| Water (NIR)       |   |         | 1 |       | d |                              |
| Confidence Flag   |   |         |   |       | ( |                              |
|                   |   |         | 2 |       | o |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         | 3 |       | F |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | ) |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | M |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | g |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | C |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | f |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | G |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       | C |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | f |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | V |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | y |                              |
|                   |   |         |   |       | G |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       | C |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | f |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         |   |       | e |                              |
+-------------------+---+---------+---+-------+---+------------------------------+
| Inversion Method  | 2 |         | 0 |       | T |                              |
| Used (NIR)        |   |         |   |       | w |                              |
|                   |   |         | 1 |       | o |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         | 2 |       | h |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | t |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | T |                              |
|                   |   |         |   |       | h |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         |   |       | h |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | t |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | N |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | t |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | v |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | l |                              |
+-------------------+---+---------+---+-------+---+------------------------------+
| Surface Type      | 2 |         | 0 |       | B |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         | 1 |       | i |                              |
|                   |   |         |   |       | g |                              |
|                   |   |         | 2 |       | h |                              |
|                   |   |         |   |       | t |                              |
|                   |   |         | 3 |       | L |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | C |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | r |                              |
|                   |   |         |   |       | O |                              |
|                   |   |         |   |       | c |                              |
|                   |   |         |   |       | e |                              |
|                   |   |         |   |       | a |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | C |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | o |                              |
|                   |   |         |   |       | u |                              |
|                   |   |         |   |       | d |                              |
|                   |   |         |   |       |   |                              |
|                   |   |         |   |       | S |                              |
|                   |   |         |   |       | u |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | g |                              |
|                   |   |         |   |       | l |                              |
|                   |   |         |   |       | i |                              |
|                   |   |         |   |       | n |                              |
|                   |   |         |   |       | t |                              |
+-------------------+---+---------+---+-------+---+------------------------------+

+-------------------+---+---------+---+------+---+------------------------------+
| ## *Scien         |   |         |   |      |   |                              |
| tific Data Set (S |   |         |   |      |   |                              |
| DS): "Quality_Ass |   |         |   |      |   |                              |
| urance_Infrared"* |   |         |   |      |   |                              |
|                   |   |         |   |      |   |                              |
| *Description**:   |   |         |   |      |   |                              |
| Product quality   |   |         |   |      |   |                              |
| and retrieval     |   |         |   |      |   |                              |
| processing flags  |   |         |   |      |   |                              |
| for Precipitable  |   |         |   |      |   |                              |
| Water (IR) at 5x5 |   |         |   |      |   |                              |
| km***             |   |         |   |      |   |                              |
|                   |   |         |   |      |   |                              |
| *Length**: 5      |   |         |   |      |   |                              |
| bytes (40         |   |         |   |      |   |                              |
| bits)***          |   |         |   |      |   |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| **Flag Name**     |   | *       |   | *    |   | **Bit Value Definitions**    |
|                   |   | *Number |   | *Bit |   |                              |
|                   |   | of      |   | Valu |   |                              |
|                   |   | Bits**  |   | es** |   |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Total             | 1 |         | 0 |      | N |                              |
| Precipitable      |   |         |   |      | o |                              |
| Water (IR)        |   |         | 1 |      | t |                              |
| Usefulness Flag   |   |         |   |      | u |                              |
| ^n^               |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | U |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | l |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Total             | 3 |         | 0 |      | B |                              |
| Precipitable      |   |         |   |      | a |                              |
| Water (IR)        |   |         | 1 |      | d |                              |
| Confidence Flag   |   |         |   |      | ( |                              |
| ^n^               |   |         | 2 |      | o |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         | 3 |      | F |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | G |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | V |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | G |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | * |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Spares            | 4 |         |   |      | T |                              |
|                   |   |         |   |      | B |                              |
|                   |   |         |   |      | D |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Cloudy  | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Clear   | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Missing | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| IR Water Vapor    | 2 |         | 0 |      | S |                              |
| Retrieval Method  |   |         |   |      | p |                              |
| Used              |   |         | 1 |      | l |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         | 2 |      | t |                              |
|                   |   |         |   |      | W |                              |
|                   |   |         | 3 |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | w |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | - |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | 2 |                              |
|                   |   |         |   |      | µ |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | T |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | h |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | q |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | I |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | P |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | O |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | h |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | N |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | R |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Spares            | 6 |         |   |      | T |                              |
|                   |   |         |   |      | B |                              |
|                   |   |         |   |      | D |                              |
+-------------------+---+---------+---+------+---+------------------------------+

^n^ Flag is not reliable in Not Useful / Bad regions (i.e. Not Useful
pixels are incorrectly tagged as Useful, etc. about ½ the time.)

+---+-------------------------------+--------------------------------+---+
|   | ## *S                         |                                |   |
|   | ample Runtime QA Flag Images* |                                |   |
|   |                               |                                |   |
|   | ***from the Water Vapor       |                                |   |
|   | Product***                    |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Surface Type Flag     |   |
| R |                               | (NIR Retrieval)"*              |   |
| e |                               |                                |   |
| f |                               | ![](media/image14.wmf)         |   |
| e |                               |                                |   |
| r |                               | *SDS =                         |   |
| e |                               | "Qu                            |   |
| n |                               | ality_Assurance_Near_Infrared" |   |
| c |                               | (NIR Water Vapor)*             |   |
| e |                               |                                |   |
| L |                               |                                |   |
| 1 |                               |                                |   |
| B |                               |                                |   |
| I |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| o |                               |                                |   |
| f |                               |                                |   |
| S |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| n |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 2 |                               |                                |   |
| F |                               |                                |   |
| e |                               |                                |   |
| b |                               |                                |   |
| 2 |                               |                                |   |
| 0 |                               |                                |   |
| 0 |                               |                                |   |
| 1 |                               |                                |   |
| 1 |                               |                                |   |
| 5 |                               |                                |   |
| : |                               |                                |   |
| 1 |                               |                                |   |
| 0 |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 3 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| M |                               |                                |   |
| O |                               |                                |   |
| D |                               |                                |   |
| I |                               |                                |   |
| S |                               |                                |   |
| T |                               |                                |   |
| e |                               |                                |   |
| r |                               |                                |   |
| r |                               |                                |   |
| a |                               |                                |   |
| ( |                               |                                |   |
| A |                               |                                |   |
| M |                               |                                |   |
| ) |                               |                                |   |
| R |                               |                                |   |
| : |                               |                                |   |
| G |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| = |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 1 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 4 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 3 |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Total Precipitable    |   |
| F |                               | Water (IR) Usefulness Flag"*   |   |
| l |                               | ^1^                            |   |
| a |                               |                                |   |
| g |                               | ![](media/image16.wmf)         |   |
| = |                               |                                |   |
| " |                               | *SDS =                         |   |
| C |                               | "Quality_Assurance_Infrared"   |   |
| l |                               | (IR Water Vapor)*              |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| n |                               |                                |   |
| e |                               |                                |   |
| s |                               |                                |   |
| s |                               |                                |   |
| F |                               |                                |   |
| l |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| " |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 5 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| _ |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| _ |                               |                                |   |
| Q |                               |                                |   |
| A |                               |                                |   |
| " |                               |                                |   |
| ( |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+

^1^ TPWIR Flags are copied from the 07_L2 Atmospheric Profile
product - - and all 07_L2 Atmospheric Profile Usefulness

and Confidence Flags are noisy.

Note: Images were created by "bitflag_visualizer", available at
<http://modis-atmos.gsfc.nasa.gov/tools_bitflag_visualizer.html>.

**Cloud Product: MOD06_L2 (Terra) & MYD06_L2 (Aqua)**

The MODIS Cloud product consists of both a 1 km set of parameters
derived from solar reflectance channels (Cloud Optical Properties and
Cirrus Reflectance) and a 5 km set of parameters determined from thermal
emitted channels (Cloud Top Properties). It should be noted that only
the Cloud Optical Property and Cloud Top Property parameter sets have QA
flags associated with them.

**Cloud Optical Properties**

Cloud Optical Property QA flags are stored in 2 separate QA arrays
(SDS's). The first SDS (*Cloud_Mask_1km*, 2 bytes in length) contains
cloud mask QA flags, which are copied from the 35_L2 Cloud Mask product.
The second SDS (*Quality_Assurance_1km*, 5 bytes in length) contains the
product quality flags, retrieval processing flags, and scene
characteristic flags. Detail on the content of these two arrays is
provided below. All Cloud Optical Property QA Flag arrays have the
following characteristics:

-   Spatial resolution: 1 x 1 km

-   **Processing mode: Daytime only**

+--------------------+---------+-------+------------------------------+
| ## *Scientif       |         |       |                              |
| ic Data Set (SDS): |         |       |                              |
|  "Cloud_Mask_1km"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud mask QA      |         |       |                              |
| flags at 1x1 km    |         |       |                              |
| ***                |         |       |                              |
|                    |         |       |                              |
| *Length**: 2 bytes |         |       |                              |
| (16 bits)***       |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Va    |                              |
|                    | of      | lue** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Mask Status  | 1       | 0     | Undetermined n,ƒ             |
| Flag               |         |       |                              |
|                    |         | 1     | Determined                   |
+--------------------+---------+-------+------------------------------+
| Cloud Mask         | 2       | 0     | Confident Cloudy (or Fill,   |
| Cloudiness Flag    |         |       | if Status Flag = 0)          |
|                    |         | 1     |                              |
|                    |         |       | Probably Cloudy              |
|                    |         | 2     |                              |
|                    |         |       | Probably Clear               |
|                    |         | 3     |                              |
|                    |         |       | Confident Clear              |
+--------------------+---------+-------+------------------------------+
| Day / Night Flag   | 1       | 0     | Night n,ƒ (or Fill, if       |
|                    |         |       | Status Flag = 0)             |
|                    |         | 1     |                              |
|                    |         |       | Day                          |
+--------------------+---------+-------+------------------------------+
| Sunglint Flag      | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Snow / Ice Flag    | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Surface Type Flag  | 2       | 0     | Ocean or Deep Lakes and      |
|                    |         |       | Rivers (or Fill)             |
|                    |         | 1     |                              |
|                    |         |       | Coast or Shallow Lakes and   |
|                    |         | 2     | Rivers                       |
|                    |         |       |                              |
|                    |         | 3     | Desert                       |
|                    |         |       |                              |
|                    |         |       | Land                         |
+--------------------+---------+-------+------------------------------+
| Heavy Aerosol Flag | 1       | 0     | Yes n,ƒ (or Fill, if Status  |
|                    |         |       | Flag = 0)                    |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Thin Cirrus Flag   | 1       | 0     | Yes (or Fill, if Status Flag |
| *(Based on low     |         |       | = 0)                         |
| threshold using    |         | 1     |                              |
| 1.38* *µm*         |         |       | No                           |
| *band.)*           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Shadow Flag        | 1       | 0     | Yes n,ƒ (or Fill, if Status  |
|                    |         |       | Flag = 0)                    |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Spares             | 5       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

n Cloud Optical Property retrieval not attempted

ƒ fill values used for Cloud Optical Property retrieval

+--------------------+---------+-------+------------------------------+
| #                  |         |       |                              |
| # *Scientific Data |         |       |                              |
|  Set (SDS): "Quali |         |       |                              |
| ty_Assurance_1km"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud Optical      |         |       |                              |
| Property product   |         |       |                              |
| quality and        |         |       |                              |
| retrieval          |         |       |                              |
| processing QA      |         |       |                              |
| flags at 1x1 km    |         |       |                              |
| ***                |         |       |                              |
|                    |         |       |                              |
| *Length**: 5 bytes |         |       |                              |
| (40 bits)***       |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 1       | 0     | Not useful                   |
| Thickness ()       |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 2       | 0     | No Confidence or Fill        |
| Thickness ()       |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 2       | 0     | Within bounds (0 \< ≤ 100)   |
| Thickness ()       |         |       | or Fill                      |
|                    |         | 1     |                              |
| Out-of-Bounds Flag |         |       | 100 \< ≤ 150                 |
|                    |         | 2     |                              |
|                    |         |       | \> 150                       |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 1       | 0     | Not useful                   |
| Radius             |         |       |                              |
|                    |         | 1     | Useful                       |
| Usefulness Flag    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 2       | 0     | No Confidence or Fill        |
| Radius             |         |       |                              |
|                    |         | 1     | Marginal Confidence          |
| Confidence Flag    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Water Path   | 1       | 0     | Not useful                   |
|                    |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Water Path   | 2       | 0     | No Confidence or Fill        |
|                    |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 3       | 0     | Cloud Mask Undetermined or   |
| Retrieval          |         |       | Non-Snow Land n,ƒ            |
|                    |         | 1     |                              |
| Phase Flag         |         |       | Not Processed (typ. clear)   |
|                    |         | 2     | over Ocean, Snow, Ice ƒ      |
| *Note: Retrieval   |         |       |                              |
| performed only     |         | 3     | Liquid Water Cloud           |
| over ocean, snow,  |         |       |                              |
| & ice. Cloud phase |         | 4     | Ice Cloud                    |
| determined by      |         |       |                              |
| Cloud Mask, IR, &  |         |       | Undetermined Phase Cloud     |
| SWIR-based         |         |       |                              |
| decision tree.*    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | 1.6 / 2.1 μm retrieval not   |
| Retrieval Outcome  |         |       | attempted or unsuccesful ƒ   |
|                    |         | 1     |                              |
|                    |         |       | 1.6 / 2.1 μm retrieval       |
|                    |         |       | successful                   |
+--------------------+---------+-------+------------------------------+
| Spare              | 1       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 3       | 0     | Cloud Mask Undetermined n,ƒ  |
| Retrieval          |         |       |                              |
|                    |         | 1     | Not Processed (typically     |
| Phase Flag         |         |       | clear) ƒ                     |
|                    |         | 2     |                              |
| *Note: Cloud phase |         |       | Liquid Water Cloud           |
| determined by      |         | 3     |                              |
| Cloud Mask, IR, &  |         |       | Ice Cloud                    |
| SWIR-based         |         | 4     |                              |
| decision tree.*    |         |       | Undetermined Phase Cloud     |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 1       | 0     | Retrieval not attempted or   |
| Retrieval          |         |       | unsuccesful ƒ                |
|                    |         | 1     |                              |
| Outcome            |         |       | Retrieval successful         |
+--------------------+---------+-------+------------------------------+
| Rayleigh           | 1       | 0     | No                           |
| Correction         |         |       |                              |
|                    |         | 1     | Yes                          |
+--------------------+---------+-------+------------------------------+
| Atmospheric        | 1       | 0     | No                           |
| Correction         |         |       |                              |
|                    |         | 1     | Yes                          |
+--------------------+---------+-------+------------------------------+
| Band Used for      | 2       | 0     | Retrieval not attempted ƒ    |
| Primary Optical    |         |       |                              |
| Thickness          |         | 1     | 0.645 µm (land)              |
| Retrieval          |         |       |                              |
|                    |         | 2     | 0.858 µm (water)             |
|                    |         |       |                              |
|                    |         | 3     | 1.24 µm (snow / ice)         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Optical Thickness  |         |       |                              |
| () Usefulness Flag |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Optical Thickness  |         |       |                              |
| () Confidence Flag |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Effective Radius   |         |       |                              |
|                    |         | 1     | Useful                       |
| Usefulness Flag    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Effective Radius   |         |       |                              |
|                    |         | 1     | Marginal Confidence          |
| Confidence Flag    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Clear Sky Restoral | 2       | 0     | Not Restored                 |
|                    |         |       |                              |
|                    |         | 1     | Restored via Edge Detection  |
|                    |         |       |                              |
|                    |         | 2     | Restored via Spatial         |
|                    |         |       | Variance                     |
|                    |         | 3     |                              |
|                    |         |       | Restored via 250 m Tests     |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Water Path         |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Water Path         |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 3       | 0     | Cloud mask undetermined n,ƒ  |
| Retrieval          |         |       |                              |
|                    |         | 1     | Not Processed (typically     |
| Multilayer Cloud & |         |       | clear) ƒ                     |
| Phase Flag         |         | 2     |                              |
|                    |         |       | Single Layer Liquid Water    |
|                    |         | 3     | Cloud                        |
|                    |         |       |                              |
|                    |         | 4     | Multi Layer Liquid Water     |
|                    |         |       | Cloud                        |
|                    |         | 5     |                              |
|                    |         |       | Single Layer Ice Cloud       |
|                    |         | 6     |                              |
|                    |         |       | Multi Layer Ice Cloud        |
|                    |         | 7     |                              |
|                    |         |       | Single Layer Undetermined    |
|                    |         |       | Phase Cloud                  |
|                    |         |       |                              |
|                    |         |       | Multi Layer Undetermined     |
|                    |         |       | Phase Cloud                  |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 1       | 0     | Retrieval not attempted or   |
| Retrieval Outcome  |         |       | unsuccesful ƒ                |
|                    |         | 1     |                              |
| (flag duplicated   |         |       | Retrieval successful         |
| from 3^rd^ byte)   |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Spare              | 1       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

n Cloud Optical Property retrieval not attempted

ƒ fill values used for Cloud Optical Property retrieval

**Cloud Top Properties**

Cloud Top Property QA flags are stored in 2 separate QA arrays (SDS's).
The first SDS (*Cloud_Mask_5km*, 1 byte in length) contains cloud mask
QA flags, which are subsampled (every 5^th^ line, every 5^th^ pixel)
from the Cloud Mask (35_L2) product. The second SDS
(*Quality_Assurance_5km*, 10 bytes in length) contains the product
quality flags, retrieval processing flags, and and input data resource
flags. Detail on the content of these two arrays is provided below. All
Cloud Top Property QA Flag arrays have the following characteristics:

-   Spatial resolution: 5 5 km

-   Processing mode: Both Day and Night

+--------------------+---------+-------+------------------------------+
| ## *Scientif       |         |       |                              |
| ic Data Set (SDS): |         |       |                              |
|  "Cloud_Mask_5km"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud mask 1 km QA |         |       |                              |
| flags subsampled   |         |       |                              |
| at 5 km (every     |         |       |                              |
| 5^th^ line, every  |         |       |                              |
| 5^th^ pixel) ***   |         |       |                              |
|                    |         |       |                              |
| *Length**: 1 byte  |         |       |                              |
| (8 bits)***        |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Mask Status  | 1       | 0     | Undetermined                 |
| Flag               |         |       |                              |
|                    |         | 1     | Determined                   |
+--------------------+---------+-------+------------------------------+
| Cloud Mask         | 2       | 0     | Confident Cloudy (or Fill,   |
| Cloudiness Flag    |         |       | if Status Flag = 0)          |
|                    |         | 1     |                              |
|                    |         |       | Probably Cloudy              |
|                    |         | 2     |                              |
|                    |         |       | Probably Clear               |
|                    |         | 3     |                              |
|                    |         |       | Confident Clear              |
+--------------------+---------+-------+------------------------------+
| Day / Night Flag   | 1       | 0     | Night (or Fill, if Status    |
|                    |         |       | Flag = 0)                    |
|                    |         | 1     |                              |
|                    |         |       | Day                          |
+--------------------+---------+-------+------------------------------+
| Sunglint Flag      | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Snow / Ice Flag    | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Surface Type Flag  | 2       | 0     | Ocean or Deep Lakes and      |
|                    |         |       | Rivers (or Fill)             |
|                    |         | 1     |                              |
|                    |         |       | Coast or Shallow Lakes and   |
|                    |         | 2     | Rivers                       |
|                    |         |       |                              |
|                    |         | 3     | Desert                       |
|                    |         |       |                              |
|                    |         |       | Land                         |
+--------------------+---------+-------+------------------------------+

+--------------------+---------+-------+------------------------------+
| #                  |         |       |                              |
| # *Scientific Data |         |       |                              |
|  Set (SDS): "Quali |         |       |                              |
| ty_Assurance_5km"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud Top Property |         |       |                              |
| product quality    |         |       |                              |
| and retrieval      |         |       |                              |
| processing QA      |         |       |                              |
| flags at 5x5 km    |         |       |                              |
| ***                |         |       |                              |
|                    |         |       |                              |
| *Length**: 10      |         |       |                              |
| bytes (80 bits)*** |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Top Pressure | 1       | 0     | Not useful                   |
| Usefulness Flag    |         |       |                              |
|                    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Top Pressure | 3       | 0     | Fill                         |
| Confidence Flag    |         |       |                              |
|                    |         | 1     | Marginal Confidence *(not    |
|                    |         |       | currently used)*             |
|                    |         | 2     |                              |
|                    |         |       | Good Confidence *(not        |
|                    |         | 3     | currently used)*             |
|                    |         |       |                              |
|                    |         |       | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Top          | 1       | 0     | Not useful                   |
| Temperature        |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Top          | 3       | 0     | Fill                         |
| Temperature        |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence *(not    |
|                    |         |       | currently used)*             |
|                    |         | 2     |                              |
|                    |         |       | Good Confidence *(not        |
|                    |         | 3     | currently used)*             |
|                    |         |       |                              |
|                    |         |       | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Fraction     | 1       | 0     | Not useful                   |
| Usefulness Flag    |         |       |                              |
|                    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Fraction     | 3       | 0     | Fill                         |
| Confidence Flag    |         |       |                              |
|                    |         | 1     | Marginal Confidence *(not    |
|                    |         |       | currently used)*             |
|                    |         | 2     |                              |
|                    |         |       | Good Confidence *(not        |
|                    |         | 3     | currently used)*             |
|                    |         |       |                              |
|                    |         |       | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 1       | 0     | Not useful                   |
| Emissivity         |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 3       | 0     | Fill                         |
| Emissivity         |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence *(not    |
|                    |         |       | currently used)*             |
|                    |         | 2     |                              |
|                    |         |       | Good Confidence *(not        |
|                    |         | 3     | currently used)*             |
|                    |         |       |                              |
|                    |         |       | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Phase        | 1       | 0     | Not useful                   |
| Infrared           |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Phase        | 3       | 0     | Fill                         |
| Infrared           |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence *(mixed  |
|                    |         |       | or undetermined phase)*      |
|                    |         | 2     |                              |
|                    |         |       | Good Confidence *(not        |
|                    |         | 3     | currently used)*             |
|                    |         |       |                              |
|                    |         |       | Very Good Confidence *(ice   |
|                    |         |       | or liquid water phase)*      |
+--------------------+---------+-------+------------------------------+
| ***processing path |         |       |                              |
| flags***           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| "Cirrus" Flag      | 2       | 0     | 0 - Missing                  |
|                    |         |       |                              |
| (CTP ≤ 700 hPa &   |         | 1     | 1 - No cirrus found          |
| CEE ≤ 0.95)        |         |       |                              |
|                    |         | 2     | 2 - Cirrus found             |
| *Note: This Flag   |         |       |                              |
| was NOT working    |         |       |                              |
| prior to           |         |       |                              |
| Collection 005.*   |         |       |                              |
+--------------------+---------+-------+------------------------------+
| "High Cloud" Flag  | 2       | 0     | 0 - Missing                  |
|                    |         |       |                              |
| (CTP \< 400 hPa)   |         | 1     | 1 - No high cloud found      |
|                    |         |       |                              |
|                    |         | 2     | 2 - High cloud found         |
+--------------------+---------+-------+------------------------------+
| Number of Cloudy   | Int 8   | 0-25  | Number of 1 km cloudy pixels |
| Pixels             |         |       | in 5x5 km retrieval area     |
+--------------------+---------+-------+------------------------------+
| Number of Clear    | Int 8   | 0-25  | Number of 1 km clear pixels  |
| Pixels             |         |       | in 5x5 km retrieval area     |
+--------------------+---------+-------+------------------------------+
| Number of Missing  | Int 8   | 0-25  | Number of 1 km missing       |
| Pixels             |         |       | pixels in 5x5 km retrieval   |
|                    |         |       | area                         |
+--------------------+---------+-------+------------------------------+
| ***input data      |         |       |                              |
| resource flags***  |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Spares             | 6       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| Clear Radiance     | 2       | 0     | MOD35\* (MODIS Cloud Mask)   |
| Origin             |         |       |                              |
|                    |         | 1     | Forward calculation from     |
|                    |         |       | model (NCEP GDAS)            |
|                    |         | 2     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Moisture Profile   | 2       | 0     | NCEP GDAS                    |
|                    |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | AIRS / AMSU                  |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Temperature        | 2       | 0     | NCEP GDAS                    |
| Profile            |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | AIRS / AMSU                  |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | NCEP GDAS                    |
| Temperature Over   |         |       |                              |
| Land               |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD11\* (MODIS Land Surface  |
|                    |         |       | Temperature)                 |
|                    |         | 3     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | Reynolds blended             |
| Temperature Over   |         |       |                              |
| Ocean              |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD28\* (MODIS Sea Surface   |
|                    |         |       | Temperature)                 |
|                    |         | 3     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface Pressure   | 2       | 0     | NCEP GDAS                    |
|                    |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Topography         | 2       | 0     | EOS DEM                      |
|                    |         |       |                              |
|                    |         | 1     | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface Emissivity | 2       | 0     | CERES                        |
|                    |         |       |                              |
|                    |         | 1     | MOD11\* (MODIS Land Surface  |
|                    |         |       | Temperature)                 |
+--------------------+---------+-------+------------------------------+
| Surface Type       | 2       | 0     | Loveland 1 km NA             |
|                    |         |       |                              |
|                    |         | 1     | Olson Ecosystem              |
|                    |         |       |                              |
|                    |         | 2     | MOD12\* (MODIS Land Cover)   |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Spares             | 8       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

\* MOD prefix denotes MODIS/Terra (AM overpass) data \-- MYD prefix
should be substituted for MODIS/Aqua (PM overpass) data.

+---+-------------------------------+--------------------------------+---+
|   | ## *S                         |                                |   |
|   | ample Runtime QA Flag Images* |                                |   |
|   |                               |                                |   |
|   | ***from the Cloud Product***  |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Clear Sky Restoral"*  |   |
| R |                               |                                |   |
| e |                               | ![](media/image17.wmf)         |   |
| f |                               |                                |   |
| e |                               | *SDS = "Quality_Assurance_1km" |   |
| r |                               | (Cloud Optical Properties)*    |   |
| e |                               |                                |   |
| n |                               |                                |   |
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| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Cirrus Flag"* *(CTP ≤ |   |
| F |                               | 700 hPa & CEE ≤ 0.95)*         |   |
| l |                               |                                |   |
| a |                               | ![](media/image19.wmf)         |   |
| g |                               |                                |   |
| = |                               | *SDS = "Quality_Assurance_5km" |   |
| " |                               | (Cloud Top Properties)*        |   |
| T |                               |                                |   |
| h |                               |                                |   |
| i |                               |                                |   |
| n |                               |                                |   |
| C |                               |                                |   |
| i |                               |                                |   |
| r |                               |                                |   |
| r |                               |                                |   |
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| s |                               |                                |   |
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| a |                               |                                |   |
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| 1 |                               |                                |   |
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| [ |                               |                                |   |
| ] |                               |                                |   |
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| d |                               |                                |   |
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| / |                               |                                |   |
| i |                               |                                |   |
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| 1 |                               |                                |   |
| 8 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| _ |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| _ |                               |                                |   |
| 1 |                               |                                |   |
| k |                               |                                |   |
| m |                               |                                |   |
| " |                               |                                |   |
| ( |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "High Cloud Flag" (CTP |   |
| F |                               | \< 400 hPa)*                   |   |
| l |                               |                                |   |
| a |                               | ![](media/image21.wmf)         |   |
| g |                               |                                |   |
| = |                               | *SDS = "Quality_Assurance_5km" |   |
| " |                               | (Cloud Top Properties)*        |   |
| M |                               |                                |   |
| u |                               |                                |   |
| l |                               |                                |   |
| t |                               |                                |   |
| i |                               |                                |   |
| l |                               |                                |   |
| a |                               |                                |   |
| y |                               |                                |   |
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| a |                               |                                |   |
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| d |                               |                                |   |
| P |                               |                                |   |
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| a |                               |                                |   |
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| g |                               |                                |   |
| " |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
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| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
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| 2 |                               |                                |   |
| 0 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
| Q |                               |                                |   |
| u |                               |                                |   |
| a |                               |                                |   |
| l |                               |                                |   |
| i |                               |                                |   |
| t |                               |                                |   |
| y |                               |                                |   |
| _ |                               |                                |   |
| A |                               |                                |   |
| s |                               |                                |   |
| s |                               |                                |   |
| u |                               |                                |   |
| r |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| _ |                               |                                |   |
| 1 |                               |                                |   |
| k |                               |                                |   |
| m |                               |                                |   |
| " |                               |                                |   |
| ( |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| O |                               |                                |   |
| p |                               |                                |   |
| t |                               |                                |   |
| i |                               |                                |   |
| c |                               |                                |   |
| a |                               |                                |   |
| l |                               |                                |   |
| P |                               |                                |   |
| r |                               |                                |   |
| o |                               |                                |   |
| p |                               |                                |   |
| e |                               |                                |   |
| r |                               |                                |   |
| t |                               |                                |   |
| i |                               |                                |   |
| e |                               |                                |   |
| s |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+

^1^ Note: "Thin Cirrus Flag" from Cloud Mask is suspect *(due to 1.38 µm
test limitations)* for portions of this granule.

Note: Images were created by "bitflag_visualizer", available at
<http://modis-atmos.gsfc.nasa.gov/tools_bitflag_visualizer.html>.

**Atmospheric Profile Product: MOD07_L2 (Terra) & MYD07_L2 (Aqua)**

Atmospheric Profile QA flags are stored in 3 separate QA arrays (SDS's).
The first SDS (*Cloud_Mask*, 1 byte in length) contains cloud mask QA
flags, which are subsampled (every 5^th^ line, every 5^th^ pixel) from
the Cloud Mask (35_L2) product. The second SDS (*Quality_Assurance*, 10
bytes in length) contains the product quality flags, retrieval
processing flags, and and input data resource flags for all products
except Water Vapor. The third SDS (*Quality_Assurance_Infrared*, 5 bytes
in length) contains the product quality flags, retrieval processing
flags, and and input data resource flags for Water Vapor (using the IR
method). Detail on the content of these three arrays is provided below.
All Atmospheric Profile QA Flag arrays have the following
characteristics:

-   Spatial resolution: 5 5 km

-   ***Processing mode: Both Day and Night***

+--------------------+---------+-------+------------------------------+
| ## *Scie           |         |       |                              |
| ntific Data Set (S |         |       |                              |
| DS): "Cloud_Mask"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud Mask QA      |         |       |                              |
| flags subsampled   |         |       |                              |
| at 5 km (every     |         |       |                              |
| 5^th^ line, every  |         |       |                              |
| 5^th^ pixel) ***   |         |       |                              |
|                    |         |       |                              |
| *Length**: 1 byte  |         |       |                              |
| (8 bits)***        |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Mask Status  | 1       | 0     | Undetermined                 |
| Flag               |         |       |                              |
|                    |         | 1     | Determined                   |
+--------------------+---------+-------+------------------------------+
| Cloud Mask         | 2       | 0     | Confident Cloudy (or Fill,   |
| Cloudiness Flag    |         |       | if Status Flag = 0)          |
|                    |         | 1     |                              |
|                    |         |       | Probably Cloudy              |
|                    |         | 2     |                              |
|                    |         |       | Probably Clear               |
|                    |         | 3     |                              |
|                    |         |       | Confident Clear              |
+--------------------+---------+-------+------------------------------+
| Day / Night flag   | 1       | 0     | Night (or Fill, if Status    |
|                    |         |       | Flag = 0)                    |
|                    |         | 1     |                              |
|                    |         |       | Day                          |
+--------------------+---------+-------+------------------------------+
| Sunglint Flag      | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Snow / Ice Flag    | 1       | 0     | Yes (or Fill, if Status Flag |
|                    |         |       | = 0)                         |
|                    |         | 1     |                              |
|                    |         |       | No                           |
+--------------------+---------+-------+------------------------------+
| Surface Type Flag  | 2       | 0     | Ocean or Deep Lakes and      |
|                    |         |       | Rivers (or Fill)             |
|                    |         | 1     |                              |
|                    |         |       | Coast or Shallow Lakes and   |
|                    |         | 2     | Rivers                       |
|                    |         |       |                              |
|                    |         | 3     | Desert                       |
|                    |         |       |                              |
|                    |         |       | Land                         |
+--------------------+---------+-------+------------------------------+

+--------------------+---------+-------+------------------------------+
| ## *Scientific     |         |       |                              |
| Data Set (SDS): "Q |         |       |                              |
| uality_Assurance"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Atmospheric        |         |       |                              |
| Profile product    |         |       |                              |
| quality and        |         |       |                              |
| retrieval          |         |       |                              |
| processing QA      |         |       |                              |
| flags at 5x5 km    |         |       |                              |
| ***                |         |       |                              |
|                    |         |       |                              |
| *Length**: 10      |         |       |                              |
| bytes (80 bits)*** |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Retrieved          | 1       | 0     | Not useful                   |
| Temperature        |         |       |                              |
| Profile Usefulness |         | 1     | Useful                       |
| Flag ^n^           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Retrieved          | 3       | 0     | Bad (or Fill)                |
| Temperature        |         |       |                              |
| Profile Confidence |         | 1     | Marginal Confidence          |
| Flag ^n^           |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| Retrieved Moisture | 1       | 0     | Not useful                   |
| Profile Usefulness |         |       |                              |
| Flag ^n^           |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Retrieved Moisture | 3       | 0     | Bad (or Fill)                |
| Profile Confidence |         |       |                              |
| Flag ^n^           |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| Total Ozone Burden | 1       | 0     | Not useful                   |
|                    |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
| ^n^                |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Total Ozone Burden | 3       | 0     | Bad (or Fill)                |
|                    |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
| ^n^                |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 1       | 0     | Not useful                   |
| (Lifted Index)     |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
| ^n^                |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 3       | 0     | Bad (or Fill)                |
| (Lifted Index)     |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
| ^n^                |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 1       | 0     | Not useful                   |
| (K Index)          |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
| ^n^                |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 3       | 0     | Bad (or Fill)                |
| (K Index)          |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
| ^n^                |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 1       | 0     | Not useful                   |
| (Total Totals)     |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
| ^n^                |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Stability Indices  | 3       | 0     | Bad (or Fill)                |
| (Total Totals)     |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
| ^n^                |         |       |                              |
|                    |         | 2     | Good Confidence *(not        |
|                    |         |       | currently used)*             |
|                    |         | 3     |                              |
|                    |         |       | Very Good Confidence *(not   |
|                    |         |       | currently used)*             |
+--------------------+---------+-------+------------------------------+
| ***processing path |         |       |                              |
| flags***           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Number of Cloudy   | Int 8   | 0-25  | Number of 1km cloudy pixels  |
| Pixels             |         |       | in 5x5 km retrieval area     |
+--------------------+---------+-------+------------------------------+
| Number of Clear    | Int 8   | 0-25  | Number of 1km clear pixels   |
| Pixels             |         |       | in 5x5 km retrieval area     |
+--------------------+---------+-------+------------------------------+
| Number of Missing  | Int 8   | 0-25  | Number of 1km missing pixels |
| Pixels             |         |       | in 5x5 km retrieval area     |
+--------------------+---------+-------+------------------------------+
| Method of Profiles | 2       | 0     | Statistical                  |
| Retrieval          |         |       |                              |
|                    |         | 1     | Physical                     |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
|                    |         |       |                              |
|                    |         | 3     | No retrieval                 |
+--------------------+---------+-------+------------------------------+
| Method of Ozone    | 2       | 0     | RTE Perturbation             |
| Retrieval          |         |       |                              |
|                    |         | 1     | Upper and Lower              |
|                    |         |       | stratospheric ozone method   |
|                    |         | 2     |                              |
|                    |         |       | Other                        |
|                    |         | 3     |                              |
|                    |         |       | No retrieval                 |
+--------------------+---------+-------+------------------------------+
| Spares             | 4       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| ***input data      |         |       |                              |
| resource flags***  |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Guess Moisture     | 2       | 0     | NCEP GDAS                    |
| profile            |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | AIRS / AMSU                  |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Guess Temperature  | 2       | 0     | NCEP GDAS                    |
| Profile            |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | AIRS / AMSU                  |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | NCEP GDAS                    |
| Temperature Over   |         |       |                              |
| Land               |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD11\* (MODIS Land Surface  |
|                    |         |       | Temperature)                 |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | Reynolds blended             |
| Temperature Over   |         |       |                              |
| Ocean              |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD28\* (MODIS Sea Surface   |
|                    |         |       | Temperature)                 |
|                    |         | 3     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface Pressure   | 2       | 0     | NCEP GDAS                    |
|                    |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Ozone First Guess  | 2       | 0     | TOMS                         |
| Profile            |         |       |                              |
|                    |         | 1     | TOVS                         |
|                    |         |       |                              |
|                    |         | 2     | GMAO                         |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Spares             | 4       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| Spares             | 8       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

\* MOD prefix denotes MODIS/Terra (AM overpass) data \-- MYD prefix
should be substituted for MODIS/Aqua (PM overpass) data.

^n^ Flag is not reliable in Not Useful / Bad regions (i.e. Not Useful
pixels are incorrectly tagged as Useful, etc. about ½ the time.)

+-------------------+---+---------+---+------+---+------------------------------+
| ## *Scien         |   |         |   |      |   |                              |
| tific Data Set (S |   |         |   |      |   |                              |
| DS): "Quality_Ass |   |         |   |      |   |                              |
| urance_Infrared"* |   |         |   |      |   |                              |
|                   |   |         |   |      |   |                              |
| *Description**:   |   |         |   |      |   |                              |
| Product quality   |   |         |   |      |   |                              |
| and retrieval     |   |         |   |      |   |                              |
| processing flags  |   |         |   |      |   |                              |
| for Precipitable  |   |         |   |      |   |                              |
| Water (IR) at 5x5 |   |         |   |      |   |                              |
| km***             |   |         |   |      |   |                              |
|                   |   |         |   |      |   |                              |
| *Length**: 5      |   |         |   |      |   |                              |
| bytes (40         |   |         |   |      |   |                              |
| bits)***          |   |         |   |      |   |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| **Flag Name**     |   | *       |   | *    |   | **Bit Value Definitions**    |
|                   |   | *Number |   | *Bit |   |                              |
|                   |   | of      |   | Valu |   |                              |
|                   |   | Bits**  |   | es** |   |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Total             | 1 |         | 0 |      | N |                              |
| Precipitable      |   |         |   |      | o |                              |
| Water (IR)        |   |         | 1 |      | t |                              |
| Usefulness Flag   |   |         |   |      | u |                              |
| ^n^               |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | U |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | l |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Total             | 3 |         | 0 |      | B |                              |
| Precipitable      |   |         |   |      | a |                              |
| Water (IR)        |   |         | 1 |      | d |                              |
| Confidence Flag   |   |         |   |      | ( |                              |
| ^n^               |   |         | 2 |      | o |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         | 3 |      | F |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | G |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | V |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | G |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | * |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | * |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Spares            | 4 |         |   |      | T |                              |
|                   |   |         |   |      | B |                              |
|                   |   |         |   |      | D |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Cloudy  | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | y |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Clear   | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | C |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Number of Missing | I |         | 0 |      | N |                              |
| Pixels            | n |         | - |      | u |                              |
|                   | t |         | 2 |      | m |                              |
|                   | 8 |         | 5 |      | b |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | k |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | p |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | x |                              |
|                   |   |         |   |      | 5 |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | a |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| IR Water Vapor    | 2 |         | 0 |      | S |                              |
| Retrieval         |   |         |   |      | p |                              |
|                   |   |         | 1 |      | l |                              |
| Method Used       |   |         |   |      | i |                              |
|                   |   |         | 2 |      | t |                              |
|                   |   |         |   |      | W |                              |
|                   |   |         | 3 |      | i |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | d |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | w |                              |
|                   |   |         |   |      | ( |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | - |                              |
|                   |   |         |   |      | 1 |                              |
|                   |   |         |   |      | 2 |                              |
|                   |   |         |   |      | µ |                              |
|                   |   |         |   |      | m |                              |
|                   |   |         |   |      | ) |                              |
|                   |   |         |   |      | T |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | c |                              |
|                   |   |         |   |      | h |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | q |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | I |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | g |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | n |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | M |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | s |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | u |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | P |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | f |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | l |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | O |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | h |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      |   |                              |
|                   |   |         |   |      | N |                              |
|                   |   |         |   |      | o |                              |
|                   |   |         |   |      | R |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | t |                              |
|                   |   |         |   |      | r |                              |
|                   |   |         |   |      | i |                              |
|                   |   |         |   |      | e |                              |
|                   |   |         |   |      | v |                              |
|                   |   |         |   |      | a |                              |
|                   |   |         |   |      | l |                              |
+-------------------+---+---------+---+------+---+------------------------------+
| Spares            | 6 |         |   |      | T |                              |
|                   |   |         |   |      | B |                              |
|                   |   |         |   |      | D |                              |
+-------------------+---+---------+---+------+---+------------------------------+

^n^ Flag is not reliable in Not Useful / Bad regions (i.e. Not Useful
pixels are incorrectly tagged as Useful, etc. about ½ the time.)

+---+-------------------------------+--------------------------------+---+
|   | ## *S                         |                                |   |
|   | ample Runtime QA Flag Images* |                                |   |
|   |                               |                                |   |
|   | ***from the Atmospheric       |                                |   |
|   | Profile Product***            |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Retrieved Temperature |   |
| R |                               | Profile Usefulness Flag"* ^1^  |   |
| e |                               |                                |   |
| f |                               | ![](media/image22.wmf)         |   |
| e |                               |                                |   |
| r |                               | *SDS = "Quality_Assurance"     |   |
| e |                               | (Atmospheric Profile)*         |   |
| n |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| L |                               |                                |   |
| 1 |                               |                                |   |
| B |                               |                                |   |
| I |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| o |                               |                                |   |
| f |                               |                                |   |
| S |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| n |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 2 |                               |                                |   |
| F |                               |                                |   |
| e |                               |                                |   |
| b |                               |                                |   |
| 2 |                               |                                |   |
| 0 |                               |                                |   |
| 0 |                               |                                |   |
| 1 |                               |                                |   |
| 1 |                               |                                |   |
| 5 |                               |                                |   |
| : |                               |                                |   |
| 1 |                               |                                |   |
| 0 |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 1 |                               |                                |   |
| 3 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
| ) |                               |                                |   |
|   |                               |                                |   |
| * |                               |                                |   |
| M |                               |                                |   |
| O |                               |                                |   |
| D |                               |                                |   |
| I |                               |                                |   |
| S |                               |                                |   |
| T |                               |                                |   |
| e |                               |                                |   |
| r |                               |                                |   |
| r |                               |                                |   |
| a |                               |                                |   |
| ( |                               |                                |   |
| A |                               |                                |   |
| M |                               |                                |   |
| ) |                               |                                |   |
| R |                               |                                |   |
| : |                               |                                |   |
| G |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| = |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 1 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 4 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 3 |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Method of Ozone       |   |
| F |                               | Retrieval"*                    |   |
| l |                               |                                |   |
| a |                               | ![](media/image24.wmf)         |   |
| g |                               |                                |   |
| = |                               | *SDS = "Quality_Assurance"     |   |
| " |                               | (Atmospheric Profile)*         |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
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| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| C |                               |                                |   |
| l |                               |                                |   |
| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| n |                               |                                |   |
| e |                               |                                |   |
| s |                               |                                |   |
| s |                               |                                |   |
| F |                               |                                |   |
| l |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| " |                               |                                |   |
| * |                               |                                |   |
|   |                               |                                |   |
| ! |                               |                                |   |
| [ |                               |                                |   |
| ] |                               |                                |   |
| ( |                               |                                |   |
| m |                               |                                |   |
| e |                               |                                |   |
| d |                               |                                |   |
| i |                               |                                |   |
| a |                               |                                |   |
| / |                               |                                |   |
| i |                               |                                |   |
| m |                               |                                |   |
| a |                               |                                |   |
| g |                               |                                |   |
| e |                               |                                |   |
| 2 |                               |                                |   |
| 3 |                               |                                |   |
| . |                               |                                |   |
| w |                               |                                |   |
| m |                               |                                |   |
| f |                               |                                |   |
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|   |                               |                                |   |
| * |                               |                                |   |
| S |                               |                                |   |
| D |                               |                                |   |
| S |                               |                                |   |
| = |                               |                                |   |
| " |                               |                                |   |
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| l |                               |                                |   |
| o |                               |                                |   |
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| d |                               |                                |   |
| _ |                               |                                |   |
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| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
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| o |                               |                                |   |
| u |                               |                                |   |
| d |                               |                                |   |
| M |                               |                                |   |
| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+

^1^ All 07_L2 Atmospheric Profile Usefulness (and Confidence) Flags are
noisy.

Collection 006 Suggestion: Remove noise from all Usefulness and
Confidence Flags in the 07_L2 Atmospheric Profile product.

Note: Images were created by "bitflag_visualizer", available at
<http://modis-atmos.gsfc.nasa.gov/tools_bitflag_visualizer.html>.

Note: The local version of the Cloud Mask QA flags in the 07_L2
Atmospheric Profile product are stored in an SDS named "Cloud_Mask."
Users should note that this array is different from the primary
"Cloud_Mask" array stored in 35_L2 Cloud Mask product, which has the
same name.

**Cloud Mask Product: MOD35_L2 (Terra) & MYD35_L2 (Aqua)**

For the Cloud Mask product, the QA flags are stored in a single ten byte
SDS (called *Quality_Assurance*) containing the product quality flags,
retrieval processing flags and input data resource flags. The Cloud Mask
QA Flag array has the following characteristics:

-   Spatial resolution: 1 1 km and 250 250 m

-   Processing mode: Both Day and Night

+--------------------+---------+-------+------------------------------+
| ## *Scientific     |         |       |                              |
| Data Set (SDS): "Q |         |       |                              |
| uality_Assurance"* |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud Mask QA      |         |       |                              |
| flags at 1 km and  |         |       |                              |
| 250 m***           |         |       |                              |
|                    |         |       |                              |
| *Length**: 10      |         |       |                              |
| bytes (80 bits)*** |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Mask (1 km)  | 1       | 0     | Not useful                   |
|                    |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Mask (1 km)  | 3       | 0     | No Confidence or Fill        |
|                    |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Spares             | 4       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| ***individual test |         |       |                              |
| application        |         |       |                              |
| flags***           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Non Cloud          | 1       | 0     | Not Applied                  |
| Obstruction (NCO)  |         |       |                              |
| Test *(Spectral    |         | 1     | Applied                      |
| tests for fire,    |         |       |                              |
| smoke, & dust)*    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Thin Cirrus        | 1       | 0     | Not Applied                  |
| (Solar) Test       |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Shadow Detection   | 1       | 0     | Not Applied                  |
| Test               |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Thin Cirrus (IR)   | 1       | 0     | Not Applied                  |
| Test               |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Cloud Adjacency    | 1       | 0     | Not Applied                  |
| Test               |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| IR Threshold Test  | 1       | 0     | Not Applied                  |
|                    |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| High Cloud (CO2)   | 1       | 0     | Not Applied                  |
| Test               |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| High Cloud (6.7    | 1       | 0     | Not Applied                  |
| µm) Test           |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| High Cloud (1.38   | 1       | 0     | Not Applied                  |
| µm) Test           |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| High Cloud (3.7-12 | 1       | 0     | Not Applied                  |
| µm) Test           |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| IR Temperature     | 1       | 0     | Not Applied                  |
| Difference Test    |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| 3.7-11 µm Test     | 1       | 0     | Not Applied                  |
|                    |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| 0.68 µm            | 1       | 0     | Not Applied                  |
| Reflectance Test   |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Visible Ratio Test | 1       | 0     | Not Applied                  |
|                    |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Near IR            | 1       | 0     | Not Applied                  |
| Reflectance Ratio  |         |       |                              |
| Test               |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| 3.7-3.9 µm Test    | 1       | 0     | Not Applied                  |
|                    |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Temporal           | 1       | 0     | Not Applied                  |
| Consistency Test   |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Spatial            | 1       | 0     | Not Applied                  |
| Variability Test   |         |       |                              |
|                    |         | 1     | Applied                      |
+--------------------+---------+-------+------------------------------+
| Spares             | 6       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| 250 m Visible      | 1 (16)  | 0     | Not Applied                  |
| Tests              |         |       |                              |
|                    |         | 1     | Applied                      |
| (Repeated 16       |         |       |                              |
| times)             |         |       |                              |
+--------------------+---------+-------+------------------------------+
| ***input data      |         |       |                              |
| information        |         |       |                              |
| flags***           |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Number of bands    | 2       | 0     | None                         |
| used to generate   |         |       |                              |
| cloud mask         |         | 1     | 1-7                          |
|                    |         |       |                              |
|                    |         | 2     | 8-14                         |
|                    |         |       |                              |
|                    |         | 3     | 15-21                        |
+--------------------+---------+-------+------------------------------+
| Number of spectral | 2       | 0     | None                         |
| tests used to      |         |       |                              |
| generate cloud     |         | 1     | 1-3                          |
| mask               |         |       |                              |
|                    |         | 2     | 4-6                          |
|                    |         |       |                              |
|                    |         | 3     | 7-9                          |
+--------------------+---------+-------+------------------------------+
| Spares             | 4       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| ***input data      |         |       |                              |
| resource flags***  |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Clear Radiance     | 2       | 0     | MOD35\* (MODIS Cloud Mask)   |
| Origin             |         |       |                              |
|                    |         | 1     | Forward calculation from     |
|                    |         |       | NCEP GDAS model              |
|                    |         | 2     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | NCEP GDAS                    |
| Temperature Over   |         |       |                              |
| Land               |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD11\* (MODIS Land Surface  |
|                    |         |       | Temperature)                 |
|                    |         | 3     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface            | 2       | 0     | Reynolds blended             |
| Temperature Over   |         |       |                              |
| Ocean              |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD28\* (MODIS Sea Surface   |
|                    |         |       | Temperature)                 |
|                    |         | 3     |                              |
|                    |         |       | Other                        |
+--------------------+---------+-------+------------------------------+
| Surface Winds      | 2       | 0     | NCEP GDAS                    |
|                    |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Ecosystem Map      | 2       | 0     | Loveland NA 1 km             |
|                    |         |       |                              |
|                    |         | 1     | Olson Ecosystem              |
|                    |         |       |                              |
|                    |         | 2     | MOD12\* (MODIS Land Cover)   |
|                    |         |       |                              |
|                    |         | 3     | Other                        |
+--------------------+---------+-------+------------------------------+
| Snow Mask          | 2       | 0     | MOD33\* (MODIS Snow Cover)   |
|                    |         |       |                              |
|                    |         | 1     | SSMI product                 |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Ice Cover          | 2       | 0     | MOD42\* (MODIS Sea Ice)      |
|                    |         |       |                              |
|                    |         | 1     | SSMI product                 |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Land/Sea Mask      | 2       | 0     | USGS 1 km 6 level            |
|                    |         |       |                              |
|                    |         | 1     | USGS 1 km binary             |
|                    |         |       |                              |
|                    |         | 2     | Other                        |
+--------------------+---------+-------+------------------------------+
| Digital Elevation  | 1       | 0     | EOS DEM                      |
| Model              |         |       |                              |
|                    |         | 1     | Not used                     |
+--------------------+---------+-------+------------------------------+
| Precipitable Water | 2       | 0     | NCEP GDAS                    |
|                    |         |       |                              |
|                    |         | 1     | GMAO                         |
|                    |         |       |                              |
|                    |         | 2     | MOD07\* (MODIS Atmospheric   |
|                    |         |       | Profile)                     |
+--------------------+---------+-------+------------------------------+
| Spares             | 5       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

\* MOD prefix denotes MODIS/Terra (AM overpass) data \-- MYD prefix
should be substituted for MODIS/Aqua (PM overpass) data.

Note: All Cloud Mask Tests are described in the Cloud Mask Algorithm
Theoretical Basis Document (ATBD).

+---+-------------------------------+--------------------------------+---+
|   | ## *S                         |                                |   |
|   | ample Runtime QA Flag Images* |                                |   |
|   |                               |                                |   |
|   | ***from the Cloud Mask        |                                |   |
|   | Product***                    |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Shadow Detection      |   |
| R |                               | Test"*                         |   |
| e |                               |                                |   |
| f |                               | ![](media/image25.wmf)         |   |
| e |                               |                                |   |
| r |                               | *SDS = "Quality_Assurance"     |   |
| e |                               | (Cloud Mask)*                  |   |
| n |                               |                                |   |
| c |                               |                                |   |
| e |                               |                                |   |
| L |                               |                                |   |
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| ) |                               |                                |   |
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| : |                               |                                |   |
| G |                               |                                |   |
| : |                               |                                |   |
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| = |                               |                                |   |
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| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 1 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
| a |                               |                                |   |
| n |                               |                                |   |
| d |                               |                                |   |
| 4 |                               |                                |   |
| : |                               |                                |   |
| B |                               |                                |   |
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| 3 |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "IR Threshold Test"*   |   |
| F |                               |                                |   |
| l |                               | ![](media/image27.wmf)         |   |
| a |                               |                                |   |
| g |                               | *SDS = "Quality_Assurance"     |   |
| = |                               | (Cloud Mask)*                  |   |
| " |                               |                                |   |
| N |                               |                                |   |
| o |                               |                                |   |
| n |                               |                                |   |
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| s |                               |                                |   |
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| " |                               |                                |   |
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| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+
| * |                               | *Flag = "Ecosystem Map"*       |   |
| F |                               |                                |   |
| l |                               | ![](media/image29.wmf)         |   |
| a |                               |                                |   |
| g |                               | *SDS = "Quality_Assurance"     |   |
| = |                               | (Cloud Mask)*                  |   |
| " |                               |                                |   |
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| a |                               |                                |   |
| s |                               |                                |   |
| k |                               |                                |   |
| ) |                               |                                |   |
| * |                               |                                |   |
+---+-------------------------------+--------------------------------+---+

Note: Images were created by "bitflag_visualizer", available at
<http://modis-atmos.gsfc.nasa.gov/tools_bitflag_visualizer.html>.

**Joint Atmosphere Product: MODATML2 (Terra) & MYDATML2 (Aqua)**

The *post-launch* Level 2 (L2) Joint Atmosphere product contains a
spectrum of key parameters gleaned from the complete set of standard
*at-launch* L2 products: Aerosol, Water Vapor, Cloud, Profile, and Cloud
Mask. The L2 Joint Atmosphere product was designed to provide a
convenient way to obtain the "greatest hits"" of MODIS Atmosphere within
a single HDF file --- small enough to minimize data transfer and storage
requirements, yet robust enough to be useful to a significant number of
MODIS data users. Scientific data sets (SDS''s) contained within the L2
Joint Atmosphere product are stored at 5 km and 10 km (at nadir) spatial
resolutions.

It should be noted that standard L2 parameters, which are retrieved at 1
km resolution, are subsampled at 5 km (every 5^th^ line, every 5^th^
pixel) for inclusion in the L2 Joint Atmosphere Product. This means that
the *Cloud_Quality_Assurance* SDS (detailed below) matches exactly the
*Quality_Assurance_1km* SDS contained within the Cloud (06_L2) product,
except that it is sub-sampled at 5 km resolution. The
*Aerosol_Quality_Assurance* array (also detailed below) is stored at its
native resolution of 10 km, however it only contains a small subset of
the flags found within the source *Quality_Assurance_Land* and
*Quality_Assurance_Ocean* SDS's in the Aerosol (04_L2) product. All
Joint Atmosphere QA Flag arrays have the following characteristics:

-   Spatial resolution: 5x5 km (Cloud Optical Properties) & 10x10 km
    (Aerosol)

-   Processing mode: Daytime only

+--------------------+---------+-------+------------------------------+
| ## *               |         |       |                              |
| Scientific Data Se |         |       |                              |
| t (SDS): "Cloud_Qu |         |       |                              |
| ality_Assurance"*  |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Cloud Optical      |         |       |                              |
| Property QA flags  |         |       |                              |
| subsampled at 5 km |         |       |                              |
| resolution ***     |         |       |                              |
|                    |         |       |                              |
| *Length**: 5 bytes |         |       |                              |
| (40 bits)***       |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 1       | 0     | Not useful                   |
| Thickness ()       |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 2       | 0     | No Confidence or Fill        |
| Thickness ()       |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Optical      | 2       | 0     | Within bounds (0 \< ≤ 100)   |
| Thickness ()       |         |       | or Fill                      |
|                    |         | 1     |                              |
| Out-of-Bounds Flag |         |       | 100 \< ≤ 150                 |
|                    |         | 2     |                              |
|                    |         |       | \> 150                       |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 1       | 0     | Not useful                   |
| Radius             |         |       |                              |
|                    |         | 1     | Useful                       |
| Usefulness Flag    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Cloud Effective    | 2       | 0     | No Confidence or Fill        |
| Radius             |         |       |                              |
|                    |         | 1     | Marginal Confidence          |
| Confidence Flag    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Cloud Water Path   | 1       | 0     | Not useful                   |
|                    |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| Cloud Water Path   | 2       | 0     | No Confidence or Fill        |
|                    |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 3       | 0     | Cloud Mask Undetermined or   |
| Retrieval          |         |       | Non-Snow Land n,ƒ            |
|                    |         | 1     |                              |
| Phase Flag         |         |       | Not Processed (typ. clear)   |
|                    |         | 2     | over Ocean, Snow, Ice ƒ      |
| *Note: Retrieval   |         |       |                              |
| performed only     |         | 3     | Liquid Water Cloud           |
| over ocean, snow,  |         |       |                              |
| & ice. Cloud phase |         | 4     | Ice Cloud                    |
| determined by      |         |       |                              |
| Cloud Mask, IR, &  |         |       | Undetermined Phase Cloud     |
| SWIR-based         |         |       |                              |
| decision tree.*    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | 1.6 / 2.1 μm retrieval not   |
| Retrieval Outcome  |         |       | attempted or unsuccesful ƒ   |
|                    |         | 1     |                              |
|                    |         |       | 1.6 / 2.1 μm retrieval       |
|                    |         |       | successful                   |
+--------------------+---------+-------+------------------------------+
| Spare              | 1       |       | TBD                          |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 3       | 0     | Cloud Mask Undetermined      |
| Retrieval          |         |       | (missing) n,ƒ                |
|                    |         | 1     |                              |
| Phase Flag         |         |       | Not Processed (typically     |
|                    |         | 2     | clear) ƒ                     |
| *Note: Cloud phase |         |       |                              |
| determined by      |         | 3     | Liquid Water Cloud           |
| Cloud Mask, IR, &  |         |       |                              |
| SWIR-based         |         | 4     | Ice Cloud                    |
| decision tree.*    |         |       |                              |
|                    |         |       | Undetermined Phase Cloud     |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 1       | 0     | Retrieval not attempted or   |
| Retrieval          |         |       | unsuccesful ƒ                |
|                    |         | 1     |                              |
| Outcome            |         |       | Retrieval successful         |
+--------------------+---------+-------+------------------------------+
| Rayleigh           | 1       | 0     | No                           |
| Correction         |         |       |                              |
|                    |         | 1     | Yes                          |
+--------------------+---------+-------+------------------------------+
| Atmospheric        | 1       | 0     | No                           |
| Correction         |         |       |                              |
|                    |         | 1     | Yes                          |
+--------------------+---------+-------+------------------------------+
| Band Used for      | 2       | 0     | Retrieval not attempted ƒ    |
| Primary Optical    |         |       |                              |
| Thickness          |         | 1     | 0.645 µm (land)              |
| Retrieval          |         |       |                              |
|                    |         | 2     | 0.858 µm (water)             |
|                    |         |       |                              |
|                    |         | 3     | 1.24 µm (snow / ice)         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Optical Thickness  |         |       |                              |
| () Usefulness Flag |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Optical Thickness  |         |       |                              |
| () Confidence Flag |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Effective Radius   |         |       |                              |
|                    |         | 1     | Useful                       |
| Usefulness Flag    |         |       |                              |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Effective Radius   |         |       |                              |
|                    |         | 1     | Marginal Confidence          |
| Confidence Flag    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Clear Sky Restoral | 2       | 0     | Not Restored                 |
|                    |         |       |                              |
|                    |         | 1     | Restored via Edge Detection  |
|                    |         |       |                              |
|                    |         | 2     | Restored via Spatial         |
|                    |         |       | Variance                     |
|                    |         | 3     |                              |
|                    |         |       | Restored via 250 m Tests     |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 1       | 0     | Not useful                   |
| Water Path         |         |       |                              |
| Usefulness Flag    |         | 1     | Useful                       |
+--------------------+---------+-------+------------------------------+
| 1.6 / 2.1 μm Cloud | 2       | 0     | No Confidence or Fill        |
| Water Path         |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 3       | 0     | Cloud mask undetermined      |
| Retrieval          |         |       | (missing) n,ƒ                |
|                    |         | 1     |                              |
| Multilayer Cloud & |         |       | Not Processed (typically     |
| Phase Flag         |         | 2     | clear) ƒ                     |
|                    |         |       |                              |
|                    |         | 3     | Single Layer Liquid Water    |
|                    |         |       | Cloud                        |
|                    |         | 4     |                              |
|                    |         |       | Multi Layer Liquid Water     |
|                    |         | 5     | Cloud                        |
|                    |         |       |                              |
|                    |         | 6     | Single Layer Ice Cloud       |
|                    |         |       |                              |
|                    |         | 7     | Multi Layer Ice Cloud        |
|                    |         |       |                              |
|                    |         |       | Single Layer Undetermined    |
|                    |         |       | Phase Cloud                  |
|                    |         |       |                              |
|                    |         |       | Multi Layer Undetermined     |
|                    |         |       | Phase Cloud                  |
+--------------------+---------+-------+------------------------------+
| Primary Cloud      | 1       | 0     | Retrieval not attempted or   |
| Retrieval Outcome  |         |       | unsuccesful ƒ                |
|                    |         | 1     |                              |
| (flag duplicated   |         |       | Retrieval successful         |
| from 3^rd^ byte)   |         |       |                              |
+--------------------+---------+-------+------------------------------+
| Spare              | 1       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

n Cloud Optical Property retrieval not attempted

ƒ fill values used for Cloud Optical Property retrieval

+--------------------+---------+-------+------------------------------+
| ## *Sc             |         |       |                              |
| ientific Data Set  |         |       |                              |
| (SDS): "Aerosol_Qu |         |       |                              |
| ality_Assurance"*  |         |       |                              |
|                    |         |       |                              |
| *Description**:    |         |       |                              |
| Aerosol QA flags   |         |       |                              |
| (a small subset of |         |       |                              |
| flags only) at     |         |       |                              |
| 10x10 km           |         |       |                              |
| resolution***      |         |       |                              |
|                    |         |       |                              |
| *Length**: 1 byte  |         |       |                              |
| (8 bits)***        |         |       |                              |
+--------------------+---------+-------+------------------------------+
| **Flag Name**      | *       | **Bit | **Bit Value Definitions**    |
|                    | *Number | Val   |                              |
|                    | of      | ues** |                              |
|                    | Bits**  |       |                              |
+--------------------+---------+-------+------------------------------+
| Aerosol Optical    | 2       | 0     | No Confidence or Fill        |
| Depth Land 0.47 µm |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Aerosol Optical    | 2       | 0     | No Confidence or Fill        |
| Depth Land 0.66 µm |         |       |                              |
| Confidence Flag    |         | 1     | Marginal Confidence          |
|                    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Aerosol Optical    | 2       | 0     | No Confidence or Fill        |
| Depth Ocean Avg.   |         |       |                              |
| Solution           |         | 1     | Marginal Confidence          |
| Confidence Flag    |         |       |                              |
|                    |         | 2     | Good Confidence              |
|                    |         |       |                              |
|                    |         | 3     | Very Good Confidence         |
+--------------------+---------+-------+------------------------------+
| Spares             | 2       |       | TBD                          |
+--------------------+---------+-------+------------------------------+

+---+-------------------+---------+-------+------------------------------+---+
| # |                   |         |       |                              |   |
| # |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
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| x |                   |         |       |                              |   |
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| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
|   |                   |         |       |                              |   |
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| L |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| n |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| h |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| : |                   |         |       |                              |   |
| 1 |                   |         |       |                              |   |
| b |                   |         |       |                              |   |
| y |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| ( |                   |         |       |                              |   |
| 8 |                   |         |       |                              |   |
| b |                   |         |       |                              |   |
| i |                   |         |       |                              |   |
| t |                   |         |       |                              |   |
| s |                   |         |       |                              |   |
| ) |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
| * |                   | *       | **Bit | **Bit Value Definitions**    |   |
| * |                   | *Number | Val   |                              |   |
| F |                   | of      | ues** |                              |   |
| l |                   | Bits**  |       |                              |   |
| a |                   |         |       |                              |   |
| g |                   |         |       |                              |   |
| N |                   |         |       |                              |   |
| a |                   |         |       |                              |   |
| m |                   |         |       |                              |   |
| e |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
| * |                   |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 1       | 0     | Not useful                   |   |
|   |                   |         |       |                              |   |
|   | Usefulness Flag   |         | 1     | Useful                       |   |
|   | ^\$^              |         |       |                              |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | No Confidence (or Fill)      |   |
|   |                   |         |       |                              |   |
|   | Confidence Flag   |         | 1     | Marginal                     |   |
|   | ^\$^              |         |       |                              |   |
|   |                   |         | 2     | ###### Good                  |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | Very Good                    |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | Mixed                        |   |
|   | Type ^\$^         |         |       |                              |   |
|   |                   |         | 1     | Dust                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 2     | ###### Smoke                 |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | ###### Sulfate               |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | Mixed                        |   |
|   |                   |         |       |                              |   |
|   | Type ^\$^         |         | 1     | Dust                         |   |
|   |                   |         |       |                              |   |
|   |                   |         | 2     | Sulfate                      |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | ###### Smoke                 |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Deep Blue Aerosol | 2       | 0     | Optimal Retrieval Performed  |   |
|   |                   |         |       |                              |   |
|   | Retrieving        |         | 1     | White Sand                   |   |
|   | Condition ^\$^    |         |       |                              |   |
|   |                   |         | 2     | Cloudy                       |   |
|   |                   |         |       |                              |   |
|   |                   |         | 3     | (550 nm) \> 5.0 (Out of      |   |
|   |                   |         |       | Bounds)                      |   |
+---+-------------------+---------+-------+------------------------------+---+
|   | Spare             | 1       |       | ###### TBD                   |   |
+---+-------------------+---------+-------+------------------------------+---+

^\$^ Implemented in PGE83 versions 5.4.0 and later (Initially
implemented in the Collection 005 Aqua reprocess)

**Appendix B:**

**Inventory Metadata**

**of**

**Atmosphere Products**

**Introduction**

This appendix describes the Inventory Metadata for all MODIS Atmosphere
products. Inventory Metadata are searchable strings, stored within each
HDF file, that can be used to assist users to select granules that meet
predetermined criteria. Inventory Metadata are stored in the HDF global
attribute \"CoreMetadata.0\".

There are two main types of Inventory Metadata:

-   ***ECS (or Core) Inventory Metadata*** that can be found, in the
    same format, in all MODIS Atmosphere products. This includes strings
    that specify *Date/Time Range* and *Bounding Rectangle*
    (geolocation). Note that ECS stands for EOSDIS Core System.

-   ***QA Inventory Metadata***, which is product-specific (i.e.: varies
    from product to product), and typically provides more scientifically
    revealing information about a granule.

The primary data archive and ordering system that utilizes the [full
set]{.underline} of both ECS and QA Inventory Metadata to search and
sort MODIS HDF granules is the ***EOS Data Gateway*** (**EDG**,
<http://redhook.gsfc.nasa.gov/ims-bin/pub/nph-ims.cgi>).

Other data archive and ordering systems utilize [only]{.underline} a
small subset of the ECS (Core) Inventory Metadata. This subset of Core
Inventory Metadata utilized typically includes only the *Date/Time
Range* and *Bounding Rectangle* (geolocation) strings. These less
powerful, but perhaps more user-friendly, data archive and ordering
systems include the ***MODIS Multiple Data Ordering Page*** (**MDOP**,
<http://disc.gsfc.nasa.gov/daac-bin/MODIS/Data_order.pl?PRINT=1>) and
the ***Atmosphere Archive and Distribution System - Web** interface*
(**AADSWeb**,
[http://aadsweb.nascom.nasa.gov](http://aadsweb.nascom.nasa.gov/)).

**ECS Inventory Metadata**

**ECS (or Core) Inventory Metadata** is high-level information that can
be used to help sort MODIS HDF data files based on basic user
requirements. Shown in the table below is the Core Inventory Metadata
implemented in all (both Level 2 and Level 3) MODIS Atmosphere products.
It includes information on granule location, collection day and time,
orbit information, percent missing data, science quality and automatic
(operational) quality flags specifically defined to be associated with
the measured parameters of a product.

The automatic quality flag is set by the MODIS processing facility
(either the Goddard DAAC (Distributed Active Archive Center) or MODAPS)
at the time the granule is produced. The science quality flag is
assigned initially by the science team, and then updated through an
update utility, if desired. Both of these flags are associated with a
particular retrieval algorithm and apply to all derived SDSs.

**All MODIS Atmosphere Products**

**ECS (or Core) Inventory Metadata**

+---------------------------+------------------------------------------+
| **ECS Core Attribute      | **Sample Value** (shown for a L2 Joint   |
| Name**                    | Product)                                 |
+---------------------------+------------------------------------------+
| LOCALGRANULEID            | "MODAT                                   |
|                           | ML2.A2001043.1510.005.2005105195411.hdf" |
+---------------------------+------------------------------------------+
| PRODUCTIONDATETIME        | "2005-04-15T19:54:11.000Z"               |
+---------------------------+------------------------------------------+
| DAYNIGHTFLAG              | "Day"                                    |
+---------------------------+------------------------------------------+
| LOCALVERSIONID            | "005"                                    |
+---------------------------+------------------------------------------+
| REPROCESSINGACTUAL        | "processed once"                         |
+---------------------------+------------------------------------------+
| REPROCESSINGPLANNED       | "further update is anticipated"          |
+---------------------------+------------------------------------------+
| SHORTNAME                 | "MODATML2"                               |
+---------------------------+------------------------------------------+
| VERSIONID                 | "5"                                      |
+---------------------------+------------------------------------------+
| PGEVERSION                | "5.1.0"                                  |
+---------------------------+------------------------------------------+
| INPUTPOINTER ^†^          | "MO                                      |
|                           | D03.A2001043.1510.005.2005105143551.hdf, |
|                           |                                          |
|                           | MOD04                                    |
|                           | _L2.A2001043.1510.005.2005105193145.hdf, |
|                           |                                          |
|                           | MOD05                                    |
|                           | _L2.A2001043.1510.005.2005105193042.hdf, |
|                           |                                          |
|                           | MOD06                                    |
|                           | _L2.A2001043.1510.005.2005105195333.hdf, |
|                           |                                          |
|                           | MOD07                                    |
|                           | _L2.A2001043.1510.005.2005105171354.hdf, |
|                           |                                          |
|                           | MOD35                                    |
|                           | _L2.A2001043.1510.005.2005105171245.hdf" |
+---------------------------+------------------------------------------+
| ***Date / Time Range***   |                                          |
+---------------------------+------------------------------------------+
| RANGEBEGINNINGTIME        | 15:10:00.000000                          |
+---------------------------+------------------------------------------+
| RANGEENDINGTIME           | 15:15:00.000000                          |
+---------------------------+------------------------------------------+
| RANGEBEGINNINGDATE        | 2001-02-12                               |
+---------------------------+------------------------------------------+
| RANGEENDINGDATE           | 2001-02-12                               |
+---------------------------+------------------------------------------+
| ***Bounding Rectangle***  |                                          |
+---------------------------+------------------------------------------+
| EASTBOUNDINGCOORDINATE    | -58.4177095990599                        |
+---------------------------+------------------------------------------+
| WESTBOUNDINGCOORDINATE    | -85.5363614515652                        |
+---------------------------+------------------------------------------+
| NORTHBOUNDINGCOORDINATE   | -11.9871990497647                        |
+---------------------------+------------------------------------------+
| SOUTHBOUNDINGCOORDINATE   | -33.0740234458278                        |
+---------------------------+------------------------------------------+
| ***Orbit Calculated       |                                          |
| Spatial Domain***         |                                          |
+---------------------------+------------------------------------------+
| ORBITNUMBER.1             | 6149                                     |
+---------------------------+------------------------------------------+
| E                         | -66.1949490630604                        |
| QUATORCROSSINGLONGITUDE.1 |                                          |
+---------------------------+------------------------------------------+
| EQUATORCROSSINGDATE.1     | 2001-02-12                               |
+---------------------------+------------------------------------------+
| EQUATORCROSSINGTIME.1     | 15:06:12.273251                          |
+---------------------------+------------------------------------------+
| ***Measured Parameter***  |                                          |
+---------------------------+------------------------------------------+
| PARAMETERNAME.1           | "Cloud_Top_Pressure" (example)           |
+---------------------------+------------------------------------------+
| SCIENCEQUALITYFLAG.1      | "Not Investigated"                       |
+---------------------------+------------------------------------------+
| SCIENC                    | "See                                     |
| EQUALITYFLAGEXPLANATION.1 | http://m                                 |
|                           | odis-atmos.gsfc.nasa.gov/validation.html |
|                           | for more details on MODIS Atmosphere     |
|                           | data quality."                           |
+---------------------------+------------------------------------------+
| AUTOMATICQUALITYFLAG.1    | "Passed"                                 |
+---------------------------+------------------------------------------+
| AUTOMATI                  | "Passed: \>10% useable; Failed: \<10%    |
| CQUALITYFLAGEXPLANATION.1 | useable"                                 |
+---------------------------+------------------------------------------+
| QAPERCENTMISSINGDATA.1    | 23                                       |
| ^\#^                      |                                          |
+---------------------------+------------------------------------------+

^†^ MODIS product input files ^\#^ Pertains to Measured ParameterName
and refers to 23% of granule being clear (no CTP retrieval)

**QA Inventory Metadata**

In addition to the ECS (or Core) Inventory Metadata described above,
product-specific **QA Inventory Metadata** is used to accommodate the QA
needs of each specific Level 2 (only) MODIS Atmosphere product. There is
no QA Inventory Metadata defined or stored for Level 3 Atmosphere
products.

The QA Inventory Metadata includes statistics reported by either the
MODIS cloud mask algorithm or by the product generation algorithm
itself. For all L2 MODIS atmosphere products, the QA Inventory Metadata
may include:

-   \% successful rate of retrieval

-   \% low confidence clear sky

-   \% various cloud types

-   \% non-cloud obstruction

-   \% day processed

-   \% night processed

-   maximum solar zenith angle

-   minimum solar zenith angle

-   \% land processed

-   \% water processed

-   \% snow background processed

-   \% shadow processed

-   \% sunglint processed

An important feature of QA Inventory Metadata is its searchability. A
user can skip an entire granule of data if the requested criteria are
not satisfied, or can examine the granule in more detail if criteria are
satisfied. Detailed descriptions of product-specific QA Inventory
Metadata for each MODIS Atmosphere product follows.

**Aerosol Product: MOD04_L2 (Terra) & MYD04_L2 (Aqua)**

QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Aerosol Retrieval***                                         

  AdditionalAttributeName.1    SuccessfulRetrievalPct_Land 1      9.10

  AdditionalAttributeName.2    SuccessfulRetrievalPct_Ocean 2     15.77

  ***Cloud and Non Cloud                                          
  Obstructions***                                                 

  AdditionalAttributeName.3    LowConfidentClearPct m             69.15

  AdditionalAttributeName.11   ThinCirrusSolarFoundPct m          22.56

  AdditionalAttributeName.12   ThinCirrusIR_FoundPct m            3.48

  AdditionalAttributeName.13   NonCloudObstructionFoundPct m      0.25

  ***Day/Night***                                                 

  AdditionalAttributeName.4    DayProcessedPct m                  100.00

  AdditionalAttributeName.5    NightProcessedPc m                 0.00

  ***Solar Zenith Angle***                                        

  AdditionalAttributeName.14   MaxSolarZenithAnglem               40.53

  AdditionalAttributeName.15   MinSolarZenithAnglem               14.10

  ***Scene Surface Type***                                        

  AdditionalAttributeName.8    LandProcessedPct m                 51.99

  AdditionalAttributeName.9    WaterProcessedPct m                48.01

  AdditionalAttributeName.7    Snow_IceSurfaceProcessPct m        0.00

  AdditionalAttributeName.10   ShadowFoundPct m                   0.08

  AdditionalAttributeName.6    SunglintProcessPct m, i            48.07
  ---------------------------- ---------------------------------- ----------

1 For the Aerosol over Land algorithm, only clear-sky, dark-surface land
pixels are retrieved.

2 For the Aerosol over Ocean algorithm, only clear-sky, non-glint ocean
pixels are retrieved.

m Fields are COPIED from the Cloud Mask QA Inventory Metadata and apply
to a 1x1 km resolution analysis of granule.

i Incorrectly computed (based on solar and viewing geometry only \-- did
not consider whether the pixel is over land or water).

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Water Vapor Product: MOD05_L2 (Terra) & MYD05_L2 (Aqua)**

QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Water Vapor Retrieval***                                     

  AdditionalAttributeName.1    SuccessfulRetrievalPct_NIR 1       99.62

  AdditionalAttributeName.2    SuccessfulRetrievalPct_IR 2        30.75

  ***Cloud and Non Cloud                                          
  Obstructions***                                                 

  AdditionalAttributeName.3    LowConfidentClearPct m             69.15

  AdditionalAttributeName.11   ThinCirrusSolarFoundPct m          22.56

  AdditionalAttributeName.12   ThinCirrusIR_FoundPct m            3.48

  AdditionalAttributeName.13   NonCloudObstructionFoundPct m      0.25

  ***Day/Night***                                                 

  AdditionalAttributeName.4    DayProcessedPct m                  100.00

  AdditionalAttributeName.5    NightProcessedPct m                0.00

  ***Solar Zenith Angle***                                        

  AdditionalAttributeName.14   MaxSolarZenithAngle m              40.53

  AdditionalAttributeName.15   MinSolarZenithAngle m              14.10

  ***Scene Surface Type***                                        

  AdditionalAttributeName.8    LandProcessedPct m                 51.99

  AdditionalAttributeName.9    WaterProcessedPct m                48.01

  AdditionalAttributeName.7    Snow_IceSurfaceProcessPct m        0.00

  AdditionalAttributeName.10   ShadowFoundPct m                   0.08

  AdditionalAttributeName.6    SunglintProcessPct m, ^i^          48.07
  ---------------------------- ---------------------------------- ----------

1 For the Near IR Water Vapor algorithm, all non-missing pixels are
retreived (but only bright-land & ocean-glint pixels are reliable).

Collection 006 Suggestion: Fix SuccessfulRetrievalPct_NIR computation so
the numerator = "reliable (useful) retrievals only".

2 For the IR Water Vapor algorithm, only clear-sky pixels (over both
land and ocean) are retreived.

m Fields are COPIED from the Cloud Mask QA Inventory Metadata and apply
to a 1x1 km resolution analysis of granule.

i Incorrectly computed (based on solar and viewing geometry only \-- did
not consider whether the pixel is over land or water).

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Cloud Product: MOD06_L2 (Terra) & MYD06_L2 (Aqua)**

**QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)**

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Cloud Top Property                                           
  Retrieval***                                                    

  AdditionalAttributeName.1    SuccessCloudTopPropRtrPct_IR 1     77.12

  AdditionalAttributeName.2    SuccessCloudPhaseRtrPct_IR 1       76.75

  AdditionalAttributeName.4    LowCloudDetectedPct_IR             19.77

  AdditionalAttributeName.5    MidCloudDetectedPct_IR             38.91

  AdditionalAttributeName.6    HighCloudDetectedPct_IR            18.44

  AdditionalAttributeName.8    ThickCloudDetectedPct_IR           28.21

  AdditionalAttributeName.7    ThinCloudDetectedPct_IR            6.44

  AdditionalAttributeName.9    OpaqueCloudDetectedPct_IR          42.47

  AdditionalAttributeName.10   CirrusCloudDetectedPct_IR          34.65

  AdditionalAttributeName.12   WaterCloudDetectedPct_IR           49.69

  AdditionalAttributeName.11   IceCloudDetectedPct_IR             13.05

  AdditionalAttributeName.13   MixedCloudDetectedPct_IR           4.86

  AdditionalAttributeName.14   CloudPhaseUncertainPct_IR          9.15

  ***Cloud Optical Property                                       
  Retrieval***                                                    

  AdditionalAttributeName.3    SuccessCloudOptPropRtrPct_VIS      64.32
                               *(succsesful retrievals only)*     

  AdditionalAttributeName.18   CloudCoverFractionPct_VIS          67.56
                               *(successful & unsuccessful)*      

  AdditionalAttributeName.19   WaterCloudDectectedPct_VIS         45.54
                               *(successful & unsuccessful)*      

  AdditionalAttributeName.20   IceCloudDetectedPct_VIS            20.86
                               *(successful & unsuccessful)*      

  ***Scene Surface Type***                                        

  AdditionalAttributeName.16   LandCoverFractionPct m             51.99

  AdditionalAttributeName.15   OceanCoverFractionPct m            48.01

  AdditionalAttributeName.17   SnowCoverFractionPct m             0.00
  ---------------------------- ---------------------------------- ----------

1 Only 5x5 km grids determined to be cloudy are retrieved. CTP
algorithms "detect" more clouds than Cloud Mask and Optical Prop.
algorithms due to 5x5 avg'ing. CloudTopPropertyIR and CloudPhaseIR pcts.
are different due to different bands being used.

m Fields are COPIED from the Cloud Mask QA Inventory Metadata and apply
to a 1x1 km resolution analysis of granule.

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Atmospheric Profile Product: MOD07_L2 (Terra) & MYD07_L2 (Aqua)**

QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Atmospheric Profile                                          
  Retrieval***                                                    

  AdditionalAttributeName.1    SuccessfulRetrievalPct 1           30.75

  ***Cloud and Non Cloud                                          
  Obstructions***                                                 

  AdditionalAttributeName.2    LowConfidenceClearPct m            69.15

  AdditionalAttributeName.10   ThinCirrusSolarFoundPct m          22.56

  AdditionalAttributeName.11   ThinCirrusIR_FoundPct m            3.48

  AdditionalAttributeName.12   NonCloudObstructionFoundPct m      0.25

  ***Day/Night***                                                 

  AdditionalAttributeName.3    DayProcessedPct m                  100.00

  AdditionalAttributeName.4    NightProcessedPct m                0.00

  ***Solar Zenith Angle***                                        

  AdditionalAttributeName.13   MaxSolarZenithAngle m              40.53

  AdditionalAttributeName.14   MinSolarZenithAngle m              14.10

  ***Scene Surface Type***                                        

  AdditionalAttributeName.7    LandProcessedPct m                 51.99

  AdditionalAttributeName.8    WaterProcessedPct m                48.01

  AdditionalAttributeName.6    Snow_IceSurfaceProcessPct m        0.00

  AdditionalAttributeName.9    ShadowFoundPct m                   0.08

  AdditionalAttributeName.5    SunglintProcessPct m, i            48.07
  ---------------------------- ---------------------------------- ----------

1 For the Atmospheric Profiles algorithm, only clear-sky pixels (either
land or ocean) are retreived.

m Fields are COPIED from the Cloud Mask QA Inventory Metadata and apply
to a 1x1 km resolution analysis of granule.

i Incorrectly computed (based on solar and viewing geometry only \-- did
not consider whether the pixel is over land or water).

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Cloud Mask Product: MOD35_L2 (Terra) & MYD35_L2 (Aqua)**

QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Cloud Mask Retrieval***                                      

  AdditionalAttributeName.1    SuccessfulRetrievalPct 1           100.00

  ***Cloud and Non Cloud                                          
  Obstructions***                                                 

  AdditionalAttributeName.7    ClearPct250m                       34.90

  AdditionalAttributeName.6    CloudCoverPct250m                  65.10

  AdditionalAttributeName.2    VeryHighConfidenceClearPct         23.78

  AdditionalAttributeName.3    HighConfidenceClearPct             5.09

  AdditionalAttributeName.4    UncertainConfidentClearPct         1.98

  AdditionalAttributeName.5    LowConfidentClearPct               69.15

  AdditionalAttributeName.15   ThinCirrusSolarFoundPct            22.56

  AdditionalAttributeName.16   ThinCirrusIR_FoundPct              3.48

  AdditionalAttributeName.17   NonCloudObstructionFoundPct        0.25

  ***Day/Night***                                                 

  AdditionalAttributeName.8    DayProcessedPct                    100.00

  AdditionalAttributeName.9    NightProcessedPct                  0.00

  ***Solar Zenith Angle***                                        

  AdditionalAttributeName.18   MaxSolarZenithAngle                40.53

  AdditionalAttributeName.19   MinSolarZenithAngle                14.10

  ***Scene Surface Type***                                        

  AdditionalAttributeName.12   LandProcessedPct                   51.99

  AdditionalAttributeName.13   WaterProcessedPct                  48.01

  AdditionalAttributeName.11   Snow_IceSurfaceProcessPct          0.00

  AdditionalAttributeName.14   ShadowFoundPct                     0.08

  AdditionalAttributeName.10   SunglintProcessPct i               48.07
  ---------------------------- ---------------------------------- ----------

1 For the Cloud Mask algorithm, all non-missing L1B pixels are
retrieved.

i Incorrectly computed (based on solar and viewing geometry only \-- did
not consider whether the pixel is over land or water).

Collection 006 Suggestion: Fix the SunglintProcessPct computation (noted
above). Fix will propagate to other L2 products.

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Joint Atmosphere Product: MODATML2 (Terra) & MYDATML2 (Aqua)**

**QA Inventory Metadata (Note: Denominator in all Percentages = Total
Pixels in entire Granule)**

  ---------------------------- ---------------------------------- ----------
  **Field Name**               **Field Description**              **Sample
                                                                  Value \^**

  ***Aerosol Retrieval***                                         

  AdditionalAttributeName.18   SuccessfulRetrievalPct_Land 1      9.10

  AdditionalAttributeName.19   SuccessfulRetrievalPct_Ocean 2     15.77

  ***Water Vapor Retrieval***                                     

  AdditionalAttributeName.20   SuccessfulRetrievalPct_NIR 3       99.62

  AdditionalAttributeName.21   SuccessfulRetrievalPct_IR 4        30.75

  ***Cloud Top Property                                           
  Retrieval***                                                    

  AdditionalAttributeName.22   SuccessCloudTopPropRtrPct_IR 5     77.12

  AdditionalAttributeName.23   SuccessCloudPhaseRtrPct_IR 5       76.75

  ***Cloud Optical Property                                       
  Retrieval***                                                    

  AdditionalAttributeName.24   SuccessCloudOptPropRtrPct_VIS      64.32
                               *(succsesful retrievals only)*     

  AdditionalAttributeName.25   CloudCoverFractionPct_VIS          67.56
                               *(successful & unsuccessful)*      

  AdditionalAttributeName.26   WaterCloudDectectedPct_VIS         45.54
                               *(successful & unsuccessful)*      

  AdditionalAttributeName.27   IceCloudDetectedPct_VIS            20.86
                               *(successful & unsuccessful)*      

  ***Cloud Mask Retrieval***                                      

  AdditionalAttributeName.1    SuccessfulRetrievalPct m           100.00

  ***Cloud and Non Cloud                                          
  Obstructions***                                                 

  AdditionalAttributeName.12   VeryHighConfidentClearPct m        23.78

  AdditionalAttributeName.13   HighConfidentClearPct m            5.09

  AdditionalAttributeName.14   UncertainConfidentClearPct m       1.98

  AdditionalAttributeName.15   LowConfidentClearPct m             69.15

  AdditionalAttributeName.16   ThinCirrusSolarFoundPct m          22.56

  AdditionalAttributeName.17   ThinCirrusIR_FoundPct m            3.48

  AdditionalAttributeName.9    NonCloudObstructionFoundPct m      0.25

  ***Day/Night***                                                 

  AdditionalAttributeName.2    DayProcessedPct m                  100.00

  AdditionalAttributeName.3    NightProcessedPct m                0.00

  ***Solar Zenith Angle***                                        

  AdditionalAttributeName.10   MaxSolarZenithAngle m              40.53

  AdditionalAttributeName.11   MinSolarZenithAngle m              14.10

  ***Scene Surface Type***                                        

  AdditionalAttributeName.4    LandProcessedPct m                 51.99

  AdditionalAttributeName.5    WaterProcessedPct ^m^              48.01

  AdditionalAttributeName.6    Snow_IceSurfaceProcessedPct m      0.00

  AdditionalAttributeName.7    ShadowFoundPct m                   0.08

  AdditionalAttributeName.8    SunglintProcessedPct m, i          48.07
  ---------------------------- ---------------------------------- ----------

1 For Aerosol over Land algorithm, only clear-sky, dark-surface land
pixels are retrieved.

2 For Aerosol over Ocean algorithm, only clear-sky, non-glint ocean
pixels are retrieved.

3 For Near IR Water Vapor, all non-missing pixels are retreived (but
only bright-land & ocean-glint pixels are reliable).

4 For IR Water Vapor, only clear-sky pixels (land and ocean) are
retreived. (Note: This number matches Atm Profile SuccessPct).

5 Only 5x5 km grids determined to be cloudy are retrieved. CTP
algorithms "detect" more clouds than Cloud Mask and Optical Prop.
algorithms due to 5x5 avg'ing. CloudTopPropertyIR and CloudPhaseIR pcts.
are different due to different bands being used.

m Fields are COPIED from the Cloud Mask QA Inventory Metadata and apply
to a 1x1 km resolution analysis of granule.

i Incorrectly computed (based on solar and viewing geometry only \-- did
not consider whether the pixel is over land or water).

**\^** Sample Values from MODIS/Terra 12 Feb 2001 15:10

![](media/image30.jpeg){width="2.557638888888889in"
height="2.432638888888889in"}

**Appendix C:**

**Archive Metadata**

**of**

**Atmosphere Products**

**Introduction**

This appendix describes the Archive Metadata for all MODIS Atmosphere
products. Archive Metadata, stored in the HDF global attribute
\"ArchiveMetadata.0\", are designed to report summary statistics and
information pertaining to a granule for documentation purposes only.

Archive metadata is stored (archived) along with science data sets of
each granule. These values are not searchable. Archive Metadata is
defined in both Level 2 and Level 3 MODIS Atmosphere products.

Arguably, the two most useful pieces of information in the Archive
Metadata are the *LocalInputGranuleID* and *ProductionHistory* strings.

-   The *LocalInputGranuleID* contains a full list of input files used
    to create the HDF product file in question. Input files can include
    other MODIS HDF product files (typically L1B Calibrated Radiances
    and/or L2 Cloud Mask) and additional ancillary files (such as
    algorithm specific look-up libraries, and/or snow, albedo and
    ecosystem maps) needed to run the L2 product algorithm.

-   The *ProductionHistory* contains the program executable (PGE)
    version that was used to produce the HDF product file. This allows
    users to trace the maturity and quality of HDF data products.
    Specific changes incorporated into various versions of PGEs can be
    found in the Products section of the MODIS Atmosphere web site at
    <http://modis-atmos.gsfc.nasa.gov/products_calendar_pge03.html>
    (Note that the link specified is for PGE03, which produces the Cloud
    Mask and Atmospheric Profiles products. All other MODIS Atmosphere
    PGE's can be selected through the menu on the left hand side of this
    page).

The complete set of archive metadata for each MODIS Atmosphere product
is described below.

**Aerosol Product: MOD04_L2 (Terra) & MYD04_L2 (Aqua)**

**Archive Metadata**

+-------------------------------+--------------------------------------+
| **Field name**                | **Sample Value**                     |
+-------------------------------+--------------------------------------+
| LONGNAME                      | "MODIS/Terra Aerosol 5-Min L2 Swath  |
|                               | 10km"                                |
+-------------------------------+--------------------------------------+
| PROCESSINGENVIRONMENT         | "Linux minion5027                    |
|                               | 2.4.20-37.7.legacysmp #1 SMP Mon Sep |
|                               | 27                                   |
|                               |                                      |
|                               | 21:38:15 EDT 2004 i686 unknown"      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEACCEPTANCE    | "June-1997"                          |
| DATE                          |                                      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEMATURITYCODE  | "at-launch"                          |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGENAME \#       | "ATBD-MOD-02"                        |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEVERSION       | "2"                                  |
+-------------------------------+--------------------------------------+
| INSTRUMENTNAME                | "Moderate Resolution Imaging         |
|                               | Spectroradiometer"                   |
+-------------------------------+--------------------------------------+
| LOCALINPUTGRANULEID ^†^       | "MOD03.                              |
|                               | A2001043.1510.005.2005105143551.hdf, |
|                               |                                      |
|                               | MOD021KM.                            |
|                               | A2001043.1510.005.2005105163716.hdf, |
|                               |                                      |
|                               | MOD35_L2.                            |
|                               | A2001043.1510.005.2005105171245.hdf" |
+-------------------------------+--------------------------------------+
| EXCLUSIONGRINGFLAG            | "N"                                  |
+-------------------------------+--------------------------------------+
| GRINGPOINTLATITUDE            | (-11.9657643150703,                  |
|                               | -15.1127398445589,                   |
|                               | -33.2616100115919,                   |
|                               |                                      |
|                               | -29.5206668804633)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTLONGITUDE           | (-79.8034155352806,                  |
|                               | -58.1828178475367,                   |
|                               | -61.0282026524014,                   |
|                               |                                      |
|                               | -85.5445842551903)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTSEQUENCENO          | (1, 2, 3, 4)                         |
+-------------------------------+--------------------------------------+
| VERYGOODQUALITYDATAPCT_LAND   | 0.00                                 |
+-------------------------------+--------------------------------------+
| GOODQUALITYDATAPCT_LAND       | 100.00                               |
+-------------------------------+--------------------------------------+
| MARGINALQUALITYDATAPCT_LAND   | 0.00                                 |
+-------------------------------+--------------------------------------+
| BADQUALITYDATAPCT_LAND        | 0.00                                 |
+-------------------------------+--------------------------------------+
| VERYGOODQUALITYDATAPCT_OCEAN  | 64.65                                |
+-------------------------------+--------------------------------------+
| GOODQUALITYDATAPCT_OCEAN      | 3.80                                 |
+-------------------------------+--------------------------------------+
| MARGINALQUALITYDATAPCT_OCEAN  | 15.96                                |
+-------------------------------+--------------------------------------+
| BADQUALITYDATAPCT_OCEAN       | 17.00                                |
+-------------------------------+--------------------------------------+
| ALGORITHMSOFTWAREVERSIONLAND  | 2                                    |
+-------------------------------+--------------------------------------+
| ALGORITHMSOFTWAREVERSIONOCEAN | 2                                    |
+-------------------------------+--------------------------------------+
| DESCRREVISION                 | 5.0                                  |
+-------------------------------+--------------------------------------+
| PRODUCTIONHISTORY             | PGE04:5.1.0                          |
+-------------------------------+--------------------------------------+

\# Refers to Algorithm Theoretical Basis Document (ATBD) reference
number

^†^ MODIS product input files

**Water Vapor Product: MOD05_L2 (Terra) & MYD05_L2 (Aqua)**

**Archive Metadata**

+-------------------------------+--------------------------------------+
| **Field name**                | **Sample Value**                     |
+-------------------------------+--------------------------------------+
| LONGNAME                      | "MODIS/Terra Total Precipitable      |
|                               | Water Vapor 5-Min L2 Swath           |
|                               |                                      |
|                               | 1km and 5km"                         |
+-------------------------------+--------------------------------------+
| PROCESSINGENVIRONMENT         | "Linux minion5027                    |
|                               | 2.4.20-37.7.legacysmp #1 SMP Mon Sep |
|                               | 27                                   |
|                               |                                      |
|                               | 21:38:15 EDT 2004 i686 unknown"      |
+-------------------------------+--------------------------------------+
| A                             | "June 1997"                          |
| LGORITHMPACKAGEACCEPTANCEDATE |                                      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEMATURITYCODE  | "at-launch"                          |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGENAME \#       | "ATBD-MOD-03"                        |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEVERSION       | "2"                                  |
+-------------------------------+--------------------------------------+
| INSTRUMENTNAME                | "Moderate Resolution Imaging         |
|                               | Spectroradiometer"                   |
+-------------------------------+--------------------------------------+
| LOCALINPUTGRANULEID ^†^       | "MOD03.                              |
|                               | A2001043.1510.005.2005105143551.hdf, |
|                               |                                      |
|                               | MOD021KM.                            |
|                               | A2001043.1510.005.2005105163716.hdf, |
|                               |                                      |
|                               | MOD35_L2.                            |
|                               | A2001043.1510.005.2005105171245.hdf, |
|                               |                                      |
|                               | MOD07_L2.                            |
|                               | A2001043.1510.005.2005105171354.hdf" |
+-------------------------------+--------------------------------------+
| EXCLUSIONGRINGFLAG            | "N"                                  |
+-------------------------------+--------------------------------------+
| GRINGPOINTLATITUDE            | (-11.9657643150703,                  |
|                               | -15.1127398445589,                   |
|                               | -33.2616100115919,                   |
|                               |                                      |
|                               | -29.5206668804633)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTLONGITUDE           | (-79.8034155352806,                  |
|                               | -58.1828178475367,                   |
|                               | -61.0282026524014,                   |
|                               |                                      |
|                               | -85.5445842551903)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTSEQUENCENO          | (1, 2, 3, 4)                         |
+-------------------------------+--------------------------------------+
| ALGORITHMSOFTWAREVERSION_NIR  | 2                                    |
+-------------------------------+--------------------------------------+
| ALGORITHMSOFTWAREVERSION_IR   | 2                                    |
+-------------------------------+--------------------------------------+
| DESCRREVISION                 | 5.0                                  |
+-------------------------------+--------------------------------------+
| PRODUCTIONHISTORY             | PGE04:5.1.0                          |
+-------------------------------+--------------------------------------+

\# Refers to Algorithm Theoretical Basis Document (ATBD) reference
number

^†^ MODIS product input files

**Cloud Product: MOD06_L2 (Terra) & MYD06_L2 (Aqua)**

**Archive Metadata**

+-------------------------------+--------------------------------------+
| **Field name**                | **Sample Value**                     |
+-------------------------------+--------------------------------------+
| LONGNAME                      | "MODIS/Terra Clouds 5-Min L2 Swath   |
|                               | 1km and 5km"                         |
+-------------------------------+--------------------------------------+
| PROCESSINGENVIRONMENT         | "Linux minion5027                    |
|                               | 2.4.20-37.7.legacysmp #1 SMP Mon Sep |
|                               | 27                                   |
|                               |                                      |
|                               | 21:38:15 EDT 2004 i686 unknown"      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEACCEPTANCE    | "June-1997"                          |
| DATE                          |                                      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEMATURITYCODE  | "at-launch"                          |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGENAME \#       | "ATBD-MOD-04 and ATBD-MOD-05"        |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEVERSION       | 2                                    |
+-------------------------------+--------------------------------------+
| INSTRUMENTNAME                | "Moderate Resolution Imaging         |
|                               | Spectroradiometer"                   |
+-------------------------------+--------------------------------------+
| LOCALINPUTGRANULEID ^†^       | "MOD021KM.                           |
|                               | A2001043.1510.005.2005105163716.hdf, |
|                               |                                      |
|                               | MOD03.                               |
|                               | A2001043.1510.005.2005105143551.hdf, |
|                               |                                      |
|                               | MOD35_L2.                            |
|                               | A2001043.1510.005.2005105171245.hdf, |
|                               |                                      |
|                               | Library_water.hdf.v1,                |
|                               |                                      |
|                               | Library_ice.hdf.v2,                  |
|                               |                                      |
|                               | Transmittance.hdf.v2,                |
|                               |                                      |
|                               | AlbMap.WS.vb1.0.2001.033.0.659.hdf,  |
|                               |                                      |
|                               | AlbMap.WS.vb1.0.2001.033.0.858.hdf,  |
|                               |                                      |
|                               | AlbMap.WS.vb1.0.2001.033.1.24.hdf,   |
|                               |                                      |
|                               | AlbMap.WS.vb1.0.2001.033.1.64.hdf,   |
|                               |                                      |
|                               | AlbMap.WS.vb1.0.2001.033.2.13.hdf,   |
|                               |                                      |
|                               | AlbSnwSts.ByNISE.W90.D90.            |
|                               | WS.Lats.70.40.2000-2004.Oct.Jan.hdf, |
|                               |                                      |
|                               | IGBP.EcoMap.NtoS.2004.149.v004.hdf"  |
+-------------------------------+--------------------------------------+
| EXCLUSIONGRINGFLAG            | "N"                                  |
+-------------------------------+--------------------------------------+
| GRINGPOINTLATITUDE            | (-11.9657643150703,                  |
|                               | -15.1127398445589,                   |
|                               | -33.2616100115919,                   |
|                               | -29.5206668804633)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTLONGITUDE           | (-79.8034155352806,                  |
|                               | -58.1828178475367,                   |
|                               | -61.0282026524014,                   |
|                               | -85.5445842551903)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTSEQUENCENO          | (1, 2, 3, 4)                         |
+-------------------------------+--------------------------------------+
| ALGORITHM_                    | 1                                    |
| VERSION_CLOUD_TOP_PROPERTY_IR |                                      |
+-------------------------------+--------------------------------------+
| ALG                           | 1                                    |
| ORITHM_VERSION_CLOUD_PHASE_IR |                                      |
+-------------------------------+--------------------------------------+
| ALGORIT                       | 1                                    |
| HM_VERSION_CLOUD_PROPERTY_VIS |                                      |
+-------------------------------+--------------------------------------+
| DESCRREVISION                 | 5.0                                  |
+-------------------------------+--------------------------------------+
| PRODUCTIONHISTORY             | PGE06:5.3.0                          |
+-------------------------------+--------------------------------------+

\# Refers to Algorithm Theoretical Basis Document (ATBD) reference
number

^†^ MODIS product input files

**Atmospheric Profile Product: MOD07_L2 (Terra) & MYD07_L2 (Aqua)**

**Archive Metadata**

+--------------------------------+-------------------------------------+
| **Field name**                 | **Sample Value**                    |
+--------------------------------+-------------------------------------+
| LONGNAME                       | "MODIS/Terra Temperature and Water  |
|                                | Vapor Profiles                      |
|                                |                                     |
|                                | 5-Min L2 Swath 5km"                 |
+--------------------------------+-------------------------------------+
| PROCESSINGENVIRONMENT          | \""Linux minion352 2.4.18-27.7.xsmp |
|                                | #1 SMP Fri Mar 14                   |
|                                |                                     |
|                                | 05:52:30 EST 2003 i686 unknown\""   |
+--------------------------------+-------------------------------------+
| INSTRUMENTNAME                 | "Moderate Resolution Imaging        |
|                                | Spectroradiometer"                  |
+--------------------------------+-------------------------------------+
| ALGORITHMPACKAGEACCEPTANCE     | "June 1997"                         |
| DATE                           |                                     |
+--------------------------------+-------------------------------------+
| ALGORITHMPACKAGEMATURITYCODE   | "at-launch"                         |
+--------------------------------+-------------------------------------+
| ALGORITHMPACKAGENAME \#        | "ATBD-MOD-07"                       |
+--------------------------------+-------------------------------------+
| ALGORITHMPACKAGEVERSION        | "2"                                 |
+--------------------------------+-------------------------------------+
| LOCALINPUTGRANULEID ^†^        | \""MOD021KM.A                       |
|                                | 2001043.1510.005.2005105163716.hdf, |
|                                |                                     |
|                                | MOD03.A                             |
|                                | 2001043.1510.005.2005105143551.hdf, |
|                                |                                     |
|                                | MOD35_L2.A                          |
|                                | 2001043.1510.005.2005105171245.hdf, |
|                                |                                     |
|                                | gdas1.PGrbF00.010212.18z,           |
|                                |                                     |
|                                | MODIS_REGCOEF_FACTORS.terra.v5,     |
|                                |                                     |
|                                | MODIS_senzen.bin,                   |
|                                |                                     |
|                                | terra_bias.dat.v2,                  |
|                                |                                     |
|                                | terra_det.dat.v2\""                 |
+--------------------------------+-------------------------------------+
| EXCLUSIONGRINGFLAG             | "N"                                 |
+--------------------------------+-------------------------------------+
| GRINGPOINTLATITUDE             | (-11.9657643150703,                 |
|                                | -15.1127398445589,                  |
|                                | -33.2616100115919,                  |
|                                |                                     |
|                                | -29.5206668804633)                  |
+--------------------------------+-------------------------------------+
| GRINGPOINTLONGITUDE            | (-79.8034155352806,                 |
|                                | -58.1828178475367,                  |
|                                | -61.0282026524014,                  |
|                                |                                     |
|                                | -85.5445842551903)                  |
+--------------------------------+-------------------------------------+
| GRINGPOINTSEQUENCENO           | (1, 2, 3, 4)                        |
+--------------------------------+-------------------------------------+
| PRO                            | 1                                   |
| FILES_ALGORITHM_VERSION_NUMBER |                                     |
+--------------------------------+-------------------------------------+
| STABILITY_IN                   | 1                                   |
| DICES_ALGORITHM_VERSION_NUMBER |                                     |
+--------------------------------+-------------------------------------+
| TOTAL_                         | 1                                   |
| OZONE_ALGORITHM_VERSION_NUMBER |                                     |
+--------------------------------+-------------------------------------+
| DESCRREVISION                  | 5.0                                 |
+--------------------------------+-------------------------------------+
| PRODUCTIONHISTORY              | PGE03:5.1.5                         |
+--------------------------------+-------------------------------------+

\# Refers to Algorithm Theoretical Basis Document (ATBD) reference
number

^†^ MODIS product input files

**Cloud Mask Product: MOD35_L2 (Terra) & MYD35_L2 (Aqua)**

**Archive Metadata**

+-------------------------------+--------------------------------------+
| **Field name**                | **Sample Value**                     |
+-------------------------------+--------------------------------------+
| LONGNAME                      | "MODIS/Terra Cloud Mask and Spectral |
|                               | Test Results                         |
|                               |                                      |
|                               | 5-Min L2 Swath 250m and 1km"         |
+-------------------------------+--------------------------------------+
| PROCESSINGENVIRONMENT         | \""Linux minion352 2.4.18-27.7.xsmp  |
|                               | #1 SMP Fri Mar 14 05:52:30 EST       |
|                               |                                      |
|                               | 2003 i686 unknown\""                 |
+-------------------------------+--------------------------------------+
| INSTRUMENTNAME                | \""Moderate Resolution Imaging       |
|                               | Spectroradiometer"                   |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEACCEPTANCE    | "June-1997"                          |
| DATE                          |                                      |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEMATURITYCODE  | "at-launch"                          |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGENAME \#       | "ATBD-MOD-06"                        |
+-------------------------------+--------------------------------------+
| ALGORITHMPACKAGEVERSION       | "2"                                  |
+-------------------------------+--------------------------------------+
| LOCALINPUTGRANULEID ^†^       | \""MOD03.                            |
|                               | A2001043.1510.005.2005105143551.hdf, |
|                               |                                      |
|                               | MOD021KM.                            |
|                               | A2001043.1510.005.2005105163716.hdf, |
|                               |                                      |
|                               | MOD02QKM.                            |
|                               | A2001043.1510.005.2005105163716.hdf, |
|                               |                                      |
|                               | goge1_2_img.v1,                      |
|                               |                                      |
|                               | ecosystem.img.v1,                    |
|                               |                                      |
|                               | thresholds.dat.terra.v13,            |
|                               |                                      |
|                               | gdas1.PGrbF00.010212.18z,            |
|                               |                                      |
|                               | oisst.20010214,                      |
|                               |                                      |
|                               | eng.010213,                          |
|                               |                                      |
|                               | NISE_SSMIF13_20010212.HDFEOS"        |
+-------------------------------+--------------------------------------+
| EXCLUSIONGRINGFLAG            | "N"                                  |
+-------------------------------+--------------------------------------+
| GRINGPOINTLATITUDE            | (-11.9657643150703,                  |
|                               | -15.1127398445589,                   |
|                               | -33.2616100115919,                   |
|                               |                                      |
|                               | -29.5206668804633)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTLONGITUDE           | (-79.8034155352806,                  |
|                               | -58.1828178475367,                   |
|                               | -61.0282026524014,                   |
|                               |                                      |
|                               | -85.5445842551903)                   |
+-------------------------------+--------------------------------------+
| GRINGPOINTSEQUENCENO          | (1, 2, 3, 4)                         |
+-------------------------------+--------------------------------------+
| CLOUD_                        | 1.00                                 |
| MASK_ALGORITHM_VERSION_NUMBER |                                      |
+-------------------------------+--------------------------------------+
| DESCRREVISION                 | 5.0                                  |
+-------------------------------+--------------------------------------+
| PRODUCTIONHISTORY             | PGE03:5.1.5                          |
+-------------------------------+--------------------------------------+

\# Refers to Algorithm Theoretical Basis Document (ATBD) reference
number

^†^ MODIS product input files

**Joint Atmosphere Product: MODATML2 (Terra) & MYDATML2 (Aqua)**

**Archive Metadata**

+-------------------+--------------------------------------------------+
| **Field name**    | **Sample Value**                                 |
+-------------------+--------------------------------------------------+
| LONGNAME          | "MODIS/Terra Aerosol, Cloud and Water Vapor      |
|                   | Subset 5-Min L2 Swath 5km and 10km"              |
+-------------------+--------------------------------------------------+
| PROC              | "Linux minion5027 2.4.20-37.7.legacysmp #1 SMP   |
| ESSINGENVIRONMENT | Mon Sep 27 21:38:15 EDT                          |
|                   |                                                  |
|                   | 2004 i686 unknown"                               |
+-------------------+--------------------------------------------------+
| INSTRUMENTNAME    | "Moderate Resolution Imaging Spectroradiometer"  |
+-------------------+--------------------------------------------------+
| E                 | "N"                                              |
| XCLUSIONGRINGFLAG |                                                  |
+-------------------+--------------------------------------------------+
| G                 | (-11.9657643150703, -15.1127398445589,           |
| RINGPOINTLATITUDE | -33.2616100115919, -29.5206668804633)            |
+-------------------+--------------------------------------------------+
| GR                | (-79.8034155352806, -58.1828178475367,           |
| INGPOINTLONGITUDE | -61.0282026524014, -85.5445842551903)            |
+-------------------+--------------------------------------------------+
| GRI               | (1, 2, 3, 4)                                     |
| NGPOINTSEQUENCENO |                                                  |
+-------------------+--------------------------------------------------+
| DESCRREVISION     | 5.0                                              |
+-------------------+--------------------------------------------------+
| PRODUCTIONHISTORY | PGE83:5.1.0                                      |
+-------------------+--------------------------------------------------+

Collection 006 Suggestions:

1.) Include a string of PGE's (reflecting the L2 MODIS Atmosphere input
products), as was done for L3

(e.g., PRODUCTIONHISTORY = \"PGE03:5.1.5; PGE06:5.3.0; PGE04:5.1.0;
PGE83:5.1.0\")

2.) Add LocalInputGranuleID string and populate with the four L2 MODIS
Atmosphere input product HDF file names, as is done for all other
products. (Note that "InputPointer" in ECS (Core) Inventory Metadata
duplicates this info.)

**Daily Global Product: MOD08_D3 (Terra) & MYD08_D3 (Aqua)**

**Archive Metadata**

  ----------------------- -------------------------------------------------------------
  **Field name**          **Sample Value**

  LONGNAME                "MODIS/Terra Aerosol Cloud Water Vapor Ozone Daily L3 Global
                          1Deg CMG"

  PROCESSINGENVIRONMENT   "IRIX64 mtvs2 6.5 10070055 IP35"

  LOCALINPUTGRANULEID     ^†^

  DESCRREVISION           5.0

  PRODUCTIONHISTORY       PGE03:5.1.5;PGE06:5.3.0;PGE04:5.1.0;PGE69:5.1.1;PGE56:5.1.1
  ----------------------- -------------------------------------------------------------

^†^ MODIS product input files (nearly 1200 L2 MODIS HDF file names)

**Eight Day Global Product: MOD08_E3 (Terra) & MYD08_E3 (Aqua)**

**Archive Metadata**

  ----------------------- -------------------------------------------------------------------------
  **Field name**          **Sample Value**

  LONGNAME                "MODIS/Terra Aerosol Cloud Water Vapor Ozone Eight Day L3 Global 1Deg
                          CMG"

  PROCESSINGENVIRONMENT   "IRIX64 mtvs2 6.5 10070055 IP35"

  LOCALINPUTGRANULEID     ^†^

  DESCRREVISION           5.0

  PRODUCTIONHISTORY       PGE03:5.1.5;PGE06:5.3.0;PGE04:5.1.0;PGE69:5.1.1;PGE56:5.1.1;PGE70:5.1.0
  ----------------------- -------------------------------------------------------------------------

^†^ MODIS product input files (up to 8 L3 Daily MODIS HDF file names)

**Monthly Global Product: MOD08_M3 (Terra) & MYD08_M3 (Aqua)**

**Archive Metadata**

  ----------------------- -------------------------------------------------------------------------
  **Field name**          **Sample Value**

  LONGNAME                "MODIS/Terra Aerosol Cloud Water Vapor Ozone Monthly L3 Global 1Deg CMG"

  PROCESSINGENVIRONMENT   "IRIX64 mtvs2 6.5 10070055 IP35"

  LOCALINPUTGRANULEID     ^†^

  DESCRREVISION           5.0

  PRODUCTIONHISTORY       PGE03:5.1.5;PGE06:5.3.0;PGE04:5.1.0;PGE69:5.1.1;PGE56:5.1.1;PGE57:5.1.0
  ----------------------- -------------------------------------------------------------------------

^†^ MODIS product input files (up to 31 L3 Daily MODIS HDF file names)