14. Monthly Cloud Averages (ISCCP-D2like-GEO)

The Monthly Cloud Averages (ISCCP-D2like-GEO) archival data product
contains 3-hourly (GMT based) monthly and monthly 1° gridded regional
daytime mean cloud properties as a function of 18 cloud types, similar
to the [ISCCP D2](http://isccp.giss.nasa.gov/products/browsed2.html)
product, where the cloud properties are stratified by pressure, optical
depth, and phase. The GEO ISCCP-D2like is a 5-satellite, daytime
3-hourly GMT, 8km nominal resolution, geostationary-only cloud product
limited to 60°N to 60°S. The GEO ISCCP-D2like is a daytime-only product,
where the cloud retrievals incorporate only a visible and IR channel
common to all geostationary satellites for spatial consistency. The
geostationary calibration is normalized to Terra-MODIS. The GEO cloud
properties are from the same source as the SRBAVG product, however they
are not temporally interpolated. Input to the Subsystem is the Gridded
GEO Narrowband Radiances (GGEO) archival data product. Each GEO
ISCCP-D2like covers a single month. The science data are Scientific Data
Sets (SDSs) with multiple records. Each record contains spatially
averaged data for an individual region. All Edition ISCCP-D2like HDF
files from Terra/Aqua, GEO composite and merged products, will have the
same structure and read program and will be differ from this current
Beta1 version.

The major categories of data output on the ISCCP-D2like-GEO HDF file is
as follows:

-   Regional Identification Parameters

-   D2like-GEO 18 Cloud Types for monthly-3-hourly/monthly

A complete listing of metadata and gridded science parameters for this
data product can be found in Table 2.14-1 through Table 2.14-5.

**Level:** 3

**Frequency:** 1/Month

**Portion of Atmosphere Covered:** Clouds

**Time Interval Covered: Portion of Globe Covered:**

**File:** 1 Month **File:** Entire Global

**Record:** 1 Month **Record:** 1-Deg Regions

**Product Version:**

**GEO Composite:** Beta1

ISCCP-D2like-GEO Metadata

The ISCCP-D2like-GEO metadata are summarized in Table 2.14-1. These
metadata contain information which need only be recorded once per
product. The CERES metadata are listed in [Appendix
B](../../DPC_AppB_R3V1.doc). [Table
B-1](../../DPC_AppB_R3V1.doc#Table_B_1) lists the CERES Baseline Header
Metadata and [Table B-2](../../DPC_AppB_R3V1.doc#Table_B_2) lists the
CERES_metadata Vdata.

1.  ISCCP-D2like Metadata Summary

+-------------------------------+-------------+-----------+-----------+
| > HDF Name                    | >           | > Records | > Number  |
|                               | Description |           | >         |
|                               | > Table     |           | > of      |
|                               |             |           | > Fields  |
+-------------------------------+-------------+-----------+-----------+
| > CERES Baseline Header       | > [Table    | > 1       | > 36      |
| > Metadata                    | > B-1](.    |           |           |
|                               | ./../DPC_Ap |           |           |
|                               | pB_R3V1.doc |           |           |
|                               | #Table_B_1) |           |           |
+-------------------------------+-------------+-----------+-----------+
| > CERES_metadata Science Data | > [Table    | > 1       | > 14      |
|                               | > B-2](.    |           |           |
|                               | ./../DPC_Ap |           |           |
|                               | pB_R3V1.doc |           |           |
|                               | #Table_B_2) |           |           |
+-------------------------------+-------------+-----------+-----------+

All of the science data are organized into the HDF Grid data type and
are contained in one ISCCP-D2like-GEO HDF file, which are shown in Table
2.14-2 to Table 2.14-5. Each table contains a list of the parameters,
including SDS index, SDS Name, data type, units, range, and number of
elements within each field.

All SDS names with a suffix of -MH refer to monthly 3-houry and a suffix
of -M to monthly mean.

+--------+----------------------------+-------------------------------+
| 2.  Te |                            |                               |
| mporal |                            |                               |
|     V  |                            |                               |
| groups |                            |                               |
+--------+----------------------------+-------------------------------+
| >      | > Vgroup Name              | > Monthly 3-Hourly Averages/  |
| Vgroup |                            | >                             |
| >      |                            | > Monthly Averages            |
| >      |                            |                               |
| Number |                            |                               |
+--------+----------------------------+-------------------------------+
| > 1    | > Monthly 3-Hourly         | > See Table 2.14-3            |
|        | > Averages                 |                               |
+--------+----------------------------+-------------------------------+
| > 2    | > Monthly Averages         | > See Table 2.14-3            |
+--------+----------------------------+-------------------------------+

+--------+------------------------------+-----------------------------+
| 3.     |                              |                             |
| Vgroup |                              |                             |
|        |                              |                             |
|  Types |                              |                             |
+--------+------------------------------+-----------------------------+
| >      | > Vgroup Name                | > Monthly 3-Hourly          |
| Vgroup |                              | > Averages/                 |
| >      |                              | >                           |
| >      |                              | > Monthly Averages          |
| Number |                              |                             |
+--------+------------------------------+-----------------------------+
| > 1    | > Regional Identification    | > See Table 2.14-4          |
|        | > Parameters                 |                             |
+--------+------------------------------+-----------------------------+
| > 2    | > D2like-GEO 18 Cloud Types  | > See Table 2.14-5          |
+--------+------------------------------+-----------------------------+

+---+---+----------------+--------+------+-------+---------+---------+
| 4 |   |                |        |      |       |         |         |
| . |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| R |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| g |   |                |        |      |       |         |         |
| i |   |                |        |      |       |         |         |
| o |   |                |        |      |       |         |         |
| n |   |                |        |      |       |         |         |
| a |   |                |        |      |       |         |         |
| l |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| I |   |                |        |      |       |         |         |
| d |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| n |   |                |        |      |       |         |         |
| t |   |                |        |      |       |         |         |
| i |   |                |        |      |       |         |         |
| f |   |                |        |      |       |         |         |
| i |   |                |        |      |       |         |         |
| c |   |                |        |      |       |         |         |
| a |   |                |        |      |       |         |         |
| t |   |                |        |      |       |         |         |
| i |   |                |        |      |       |         |         |
| o |   |                |        |      |       |         |         |
| n |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| P |   |                |        |      |       |         |         |
| a |   |                |        |      |       |         |         |
| r |   |                |        |      |       |         |         |
| a |   |                |        |      |       |         |         |
| m |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| t |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| r |   |                |        |      |       |         |         |
| s |   |                |        |      |       |         |         |
+===+===+================+========+======+=======+=========+=========+
| > |   | > SDS Name     | > Data | > U  | >     | > No.   |         |
|   |   |                | >      | nits | Range | > of    |         |
| S |   |                | > Type |      |       | >       |         |
| D |   |                |        |      |       | > E     |         |
| S |   |                |        |      |       | lements |         |
| > |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| I |   |                |        |      |       |         |         |
| n |   |                |        |      |       |         |         |
| d |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| x |   |                |        |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Colatitude   | >      | > De | > 0   | > 8\*1  | > 1\*1  |
|   |   |                | 32-Bit | gree | > ..  | 80\*360 | 80\*360 |
| 0 | 9 |                | >      |      | > 180 |         |         |
|   |   |                |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Longitude    | >      | > De | > 0   | > 8\*1  | > 1\*1  |
|   |   |                | 32-Bit | gree | > ..  | 80\*360 | 80\*360 |
| 1 | 1 |                | >      |      | > 360 |         |         |
|   | 0 |                |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+

See [Table
2.9-7](http://science.larc.nasa.gov/ceres/DPC/DPC_current/pdfs/DPC_ISCCP-D2like-Day-Nit_R5V1.pdf)
for a complete list of the 8 GMT-based monthly 3-hourly time increments

Black = (MH) Monthly 3-Hourly

Red = (M) Monthly Mean

+---+---+----------------+--------+------+-------+---------+---------+
| 5 |   |                |        |      |       |         |         |
| . |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| I |   |                |        |      |       |         |         |
| S |   |                |        |      |       |         |         |
| C |   |                |        |      |       |         |         |
| C |   |                |        |      |       |         |         |
| P |   |                |        |      |       |         |         |
| - |   |                |        |      |       |         |         |
| D |   |                |        |      |       |         |         |
| 2 |   |                |        |      |       |         |         |
| l |   |                |        |      |       |         |         |
| i |   |                |        |      |       |         |         |
| k |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| - |   |                |        |      |       |         |         |
| G |   |                |        |      |       |         |         |
| E |   |                |        |      |       |         |         |
| O |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| C |   |                |        |      |       |         |         |
| l |   |                |        |      |       |         |         |
| o |   |                |        |      |       |         |         |
| u |   |                |        |      |       |         |         |
| d |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| T |   |                |        |      |       |         |         |
| y |   |                |        |      |       |         |         |
| p |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| s |   |                |        |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > |   | > SDS Name     | > Data | > U  | >     | > No.   |         |
|   |   |                | >      | nits | Range | > of    |         |
| S |   |                | > Type |      |       | >       |         |
| D |   |                |        |      |       | > E     |         |
| S |   |                |        |      |       | lements |         |
| > |   |                |        |      |       |         |         |
|   |   |                |        |      |       |         |         |
| I |   |                |        |      |       |         |         |
| n |   |                |        |      |       |         |         |
| d |   |                |        |      |       |         |         |
| e |   |                |        |      |       |         |         |
| x |   |                |        |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Number Of    | >      | >    | > N/A | > 8\*1  | > 1\*1  |
|   |   | > Observations | 32-Bit |  N/A |       | 80\*360 | 80\*360 |
| 2 | 1 |                | >      |      |       |         |         |
|   | 1 |                |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Total Cloud  | >      | >    | > 0.0 | > 8\*1  | > 1\*1  |
|   |   | > Area         | 32-Bit |  Per | > ..  | 80\*360 | 80\*360 |
| 3 | 1 | > Fraction     | >      | cent | >     |         |         |
|   | 2 |                |  Float |      | 100.0 |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Cloud Area   | >      | >    | > 0.0 | > 8     | > 1     |
|   |   | > Fraction     | 32-Bit |  Per | > ..  | \*18\*1 | \*18\*1 |
| 4 | 1 |                | >      | cent | >     | 80\*360 | 80\*360 |
|   | 3 |                |  Float |      | 100.0 |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Effective    | >      | >    | > 0   | > 8     | > 1     |
|   |   | > Pressure     | 32-Bit |  hPa | > ..  | \*18\*1 | \*18\*1 |
| 5 | 1 |                | >      |      | >     | 80\*360 | 80\*360 |
|   | 4 |                |  Float |      |  1100 |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Effective    | >      | > K  | > 100 | > 8     | > 1     |
|   |   | > Temperature  | 32-Bit |      | > ..  | \*18\*1 | \*18\*1 |
| 6 | 1 |                | >      |      | > 350 | 80\*360 | 80\*360 |
|   | 5 |                |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Log          | >      | >    | > -6  | > 8     | > 1     |
|   |   | > (Visible)    | 32-Bit |  N/A | > ..  | \*18\*1 | \*18\*1 |
| 7 | 1 | > Optical      | >      |      | > 6   | 80\*360 | 80\*360 |
|   | 6 | > Depth - MH   |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+
| > | > | > Liquid/Ice   | >      | >    | > 0   | > 8     | > 1     |
|   |   | > Water Path - | 32-Bit |  N/A | > ..  | \*18\*1 | \*18\*1 |
| 8 | 1 | > MH           | >      |      | > 400 | 80\*360 | 80\*360 |
|   | 7 |                |  Float |      |       |         |         |
+---+---+----------------+--------+------+-------+---------+---------+

Black = (MH) Monthly 3-Hourly

Red = (M) Monthly Mean

+--------------+--------------------+---------+-----------------------+
| 6.  List of  |                    |         |                       |
|     the 18   |                    |         |                       |
|     Cloud    |                    |         |                       |
|     Types    |                    |         |                       |
|     used in  |                    |         |                       |
|     Table    |                    |         |                       |
|     2.14-5   |                    |         |                       |
+==============+====================+=========+=======================+
| > Cloud Type | > Name             | > Phase | > (Pressure Level,    |
|              |                    |         | > Optical Depth       |
|              |                    |         | > Level)              |
+--------------+--------------------+---------+-----------------------+
| > 1          | > Cumulus          | >       | > (Low, Thin)         |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 2          | > Stratocumulus    | >       | > (Low, Mid-thick)    |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 3          | > Stratus          | >       | > (Low, Thick)        |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 4          | > Cumulus          | > Ice   | > (Low, Thin)         |
+--------------+--------------------+---------+-----------------------+
| > 5          | > Stratocumulus    | > Ice   | > (Low, Mid-thick)    |
+--------------+--------------------+---------+-----------------------+
| > 6          | > Stratus          | > Ice   | > (Low, Thick)        |
+--------------+--------------------+---------+-----------------------+
| > 7          | > Altocumulus      | >       | > (Mid, Thin)         |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 8          | > Altostratus      | >       | > (Mid, Mid-thick)    |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 9          | > Nimbostratus     | >       | > (Mid, Thick)        |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 10         | > Altocumulus      | > Ice   | > (Mid, Thin)         |
+--------------+--------------------+---------+-----------------------+
| > 11         | > Altostratus      | > Ice   | > (Mid, Mid-thick)    |
+--------------+--------------------+---------+-----------------------+
| > 12         | > Nimbostratus     | > Ice   | > (Mid, Thick)        |
+--------------+--------------------+---------+-----------------------+
| > 13         | > Cirrus           | >       | > (High, Thin)        |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 14         | > Cirrostratus     | >       | > (High, Mid-thick)   |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 15         | > Deep Convection  | >       | > (High, Thick)       |
|              |                    |  Liquid |                       |
+--------------+--------------------+---------+-----------------------+
| > 16         | > Cirrus           | > Ice   | > (High, Thin)        |
+--------------+--------------------+---------+-----------------------+
| > 17         | > Cirrostratus     | > Ice   | > (High, Mid-thick)   |
+--------------+--------------------+---------+-----------------------+
| > 18         | > Deep Convection  | > Ice   | > (High, Thick)       |
+--------------+--------------------+---------+-----------------------+

+-----------+-----------------+----------------------------------------+
| 7.  List  |                 |                                        |
|     of    |                 |                                        |
|     the 8 |                 |                                        |
|           |                 |                                        |
| GMT-based |                 |                                        |
|           |                 |                                        |
|   monthly |                 |                                        |
|           |                 |                                        |
|  3-hourly |                 |                                        |
|           |                 |                                        |
|   indices |                 |                                        |
|     used  |                 |                                        |
|     in\   |                 |                                        |
|     this  |                 |                                        |
|           |                 |                                        |
|  document |                 |                                        |
+-----------+-----------------+----------------------------------------+
| > Time    | > **Time        |                                        |
| > index   | > increment**   |                                        |
+-----------+-----------------+----------------------------------------+
| > 1       | > 00-03 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 2       | > 03-06 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 3       | > 06-09 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 4       | > 09-12 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 5       | > 12-15 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 6       | > 15-18 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 7       | > 18-21 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 8       | > 21-24 GMT     |                                        |
+-----------+-----------------+----------------------------------------+
| > 1       | > 00-24 GMT     |                                        |
|           | > Monthly       |                                        |
+-----------+-----------------+----------------------------------------+

Black = (MH) Monthly 3-Hourly

Red = (M) Monthly Mean

+-----------------------------------------------------------------------+
| 8.  Definition of the 180x360 regions used in this document           |
+-----------------------------------------------------------------------+
| There are 180 1° equal latitude bins and 360 1° equal longitude bins  |
+-----------------------------------------------------------------------+
| The latitude index #1 is defined at 89.5°N and index #180 is defined  |
| at 89.5°S                                                             |
+-----------------------------------------------------------------------+
| The longitude index #1 is defined at 0.5°E and index #360 is defined  |
| at 359.5°W                                                            |
+-----------------------------------------------------------------------+

**Total Bits/Region Record: 27,072**

**Total Bytes/Region Record: 3,384**

**Total Records/File: 64,800**

**Total Bits/File: 1,754,265,600**

**Total Bytes/File: 219,283,200**

ISCCP-D2like-GEO Revision Record

The product Revision Record contains information pertaining to approved
document changes. The table lists the date the Software Configuration
Change Request (SCCR) was approved, the Release and Version Number, the
SCCR number, a short description of the revision, and the revised
sections. The document authors are listed on the cover.

+---------+------+------+------------------------------+------------+---+
| IS      |      |      |                              |            |   |
| CCP-D2l |      |      |                              |            |   |
| ike-GEO |      |      |                              |            |   |
| R       |      |      |                              |            |   |
| evision |      |      |                              |            |   |
| Record  |      |      |                              |            |   |
+---------+------+------+------------------------------+------------+---+
| > SCCR  | >    | >    | > Description of Revision    | >          |   |
| >       | Rele | SCCR |                              | Section(s) |   |
| > A     | ase/ | >    |                              | >          |   |
| pproval | >    | > Nu |                              | > Affected |   |
| >       | >    | mber |                              |            |   |
| > Date  |  Ver |      |                              |            |   |
|         | sion |      |                              |            |   |
|         | >    |      |                              |            |   |
|         | > Nu |      |                              |            |   |
|         | mber |      |                              |            |   |
+---------+------+------+------------------------------+------------+---+
| > 0     | >    | >    | -   Initial version.         | > All      |   |
| 5/28/08 | R5V1 |  675 |                              |            |   |
+---------+------+------+------------------------------+------------+---+