Appendix. 3-1
AMSR-E Level 1 product format description（MAS-100045A）

MAS-100045A

Aqua AMSR-E
Level 1 Product Format
Description Document

Japan Aerospace Exploration Agency (JAXA)COPYRIGHT JAXAContents
1.

Introduction ................................................................................................................................................ 1
1.1. Abstract ............................................................................................................................................... 1
2. Abstract of the Satellite and Sensor ............................................................................................................ 2
2.1. Overview of Aqua (EOS-PM; Earth Observation Satellite-PM) ......................................................... 2
2.2. Overview of AMSR-E......................................................................................................................... 4
2.3. Observation Principal of AMSR-E ..................................................................................................... 5
2.4. Observation Geometry ........................................................................................................................ 5
3. AMSR-E Level 1 Product ........................................................................................................................... 6
3.1. Definition of a Scene for AMSR-E ..................................................................................................... 6
3.2. AMSR-E Level 1 Product Specification ............................................................................................. 8
4. HDF .......................................................................................................................................................... 10
4.1. Outline of HDF ................................................................................................................................. 10
4.2. HDF File ........................................................................................................................................... 10§L1A.

AMSR-E Level 1A Product Format Description§L1B.

AMSR-E Level 1B Product Format Description (Not applicable for NSIDC DAP package)§L1M.

AMSR-E Level 1BMap Product Format Description (Not applicable for NSIDC DAP package)1.

Introduction

This document is the level 1 product format description of AMSR-E (Advanced Microwave Scanning Radiometer
for EOS) on boarded Aqua (EOS-PM; Earth Observation Satellite-PM).

1.1.

Abstract

AMSR-E products are shown in Table 1.1-1. This document explains level 1A, level 1B and level 1B Map
products.

Table 1.1-1 Types of AMSR-E products
Outline of the productProduct level
1A

This product includes observed sensor data, the radiometric correction conversion coefficients,
and geometrical information of each sampled observation. Observed sensor data is raw counted
value, and geometrical information contains geo-location of observed surface on the earth, solar
angle, directional vector to Aqua, and so on.

1B

This product includes the brightness temperature converted by the radiometric correction
coefficients from observed sensor data of level 1A. It also contains the ancillary data stored inlevel 1A product.

1B MapThis product is a clipped observation data of the level 1B product for some 3000 km around andmap projected, and includes ancillary information. There exist three kinds of projection methods
such as Equirectangular, Mercator and Polar stereo.

2This product includes physical parameters related the hydrology (accumulated water vapor,accumulated cloud liquid water, amount of precipitation, sea surface wind speed, sea surface
temperature, sea ice concentration, snow water equivalence, and soil moisture) produced from
L1B products, and ancillary information.

2 Map

This product is clipped from level 2 product for some 3000 km around and map projected, andincludes ancillary information.

3

There are two kinds of these products such as daily or monthly averaged observation data. It
includes ancillary information and map projected onto global grids.

Remarks: The shaded products in the above list are specified in other documents for each.

12. Abstract of the Satellite and Sensor
2.1.

Overview of Aqua (EOS-PM; Earth Observation Satellite-PM)

The earth observing satellite Aqua of NASA was launched from the Vandenberg Firing Range in California by a
DELTA II launch vehicle in May 2002. Aqua observes various kinds of physical phenomena related to water andenergy circulation from space. Aqua data will promote the research activities for interactions between theatmosphere, oceans and lands, and their effects on climate changes.

There are a lot of derived data from Aqua data such as atmospheric temperature, humidity, clouds andprecipitation, earth radiation, snow and sea ice, sea-surface temperature, oceanic primary production, and soil
water. These collected datasets are expected to promote the further development of research on global
environmental change, as well as improving numerical weather forecasts.

Aqua satellite is shown in Figure 2.1-1. Its main characteristics and sensors are listed in Table 2.1-1 and Table
2.1-2.

Figure 2.1-1 Aqua Satellite2Table 2.1-1

Main characteristics of Aqua

Launch Date

May 4th, 2002

WeightAbout 3,000 kg (at launch)Power4,444 W (Average)Life

6 years (Target)
Category

Sun-synchronous sub-recurrent orbit

Altitude

705 kmInclination

98 ± 0.1degrees

Period98.9 minutes

Revisit Period

16 days

Local Sun Time

PM13: 30 ± 15 minutes

Orbit

AMSR-E
AMSU
AIRS
CERES
HSB
MODIS
* JAXA:* NASA:* INPE:

Table 2.1-2 Instruments of Aqua
Instrument
Development organization(Country)
Advanced Microwave Scanning Radiometer for EOS
JAXA（Japan）
Advanced Microwave Sounding Unit
NASA
（US）
Atmospheric Infrared Sounder
NASA
（US）
Clouds and the Earth’s Radiant Energy System
NASA
（US）
Humidity Sounder for Brazil
INPE（Brazil）
Moderate Resolution Imaging Spectroradiometer
NASA
（US）
Japan Aerospace Exploration Agency
National Aeronautics and Space Administration
Institute National de Pesquisas Espaciais

3

2.2.

Overview of AMSR-E

AMSR-E (Advanced Microwave Scanning Radiometer for EOS) has the largest-diameter microwave scanningradiometer (about 1.6 meters), and it can observe water relevant data with high resolution. Moreover, AMSR-E
observes microwaves instead of optical data, and it can observe from day to night, under any weather conditionand less cloud effects. AMSR-E will demonstrate advantages and viabilities of microwave-based observation ofland and sea under clouds.

AMSR-E measures the radiation from the earth surface or atmosphere. The data obtained by AMSR-E isconverted to brightness temperature by the temperature of CSM (Cold Sky Mirror) and HTS (High Temperaturenoise Source, the radiometric wave absorber). It will provide geophysical information relevant to water such as
the integrated water vapor, integrated cloud liquid water, precipitation, sea surface wind speed, sea surface
temperature, sea ice concentration, snow water equivalent, and soil moisture and so on.
Main characteristics of AMSR-E are shown Table 2.2-1.

Table 2.2-1
Frequency (GHz)
Resolution
Band Width (MHz)6.9

Main Characteristics of AMSR-E

10.65

23.8

36.5

89

About 50 km

About 25 km

15 km

5 km

350

200

1000

3000

100

18.7

400

Polarization

Horizontal and Vertical

Incident Angle

About 55 degrees

Cross Polarization
Under -20 db
Characteristics
Swath Width

About 1450 km

Dynamic Range

2.7-340 K

Absolute Accuracy

1 K (1-sigma)

Temperature Resolution

0.3-1 K (1-sigma)

Quantization bits

12 bits

10 bits4

2.3.

Observation Principal of AMSR-E

An object emits the electromagnetic wave of various wavelengths from its surface in microwave region (1-100
GHz). The electromagnetic intensity differs by its physical features, observing frequencies, and so on. Using thesecharacteristics, AMSR-E observes the faint microwave emitted from the earth surface or the atmosphere.

AMSR-E main reflector rotates to scan and collect radiation of the microwave from the earth surface or theatmosphere. After the microwave was concentrated with its main reflector, it was distributed to the six receivers.
The microwave signals detected by each receiver are amplified and integrated, then converted to the digital countvalue by an A/D converter. These values are the observation raw data of a level 1 product. Furthermore each
receiver observes the microwaves of background radiation from the deep space and radiation from the absorberwhich temperature is controlled for the specific temperature. These data are applied to correct the observation
data.

2.4.

Observation Geometry

AMSR-E is a conical scan sensor and sweeps the surface of the Earth at about ±75° centered at the direction of thesatellite flight. The swath width is about 1450 km. The scanning period is 1.5 sec and the data-sampling interval is
every 2.6msec for 6GHz - 36GHz, 1.3msec for 89GHz and triggered by the antenna rotation. As a result, the
AMSR-E samples 486 data points for a scan of 89GHz and 243 points for other channels. (Fig. 2.4-1)

Figure 2.4-1 Observation Geometry of AMSR-E

5

3.

AMSR-E Level 1 Product3.1.

Definition of a Scene for AMSR-E

A scene of AMSR-E is defined as a half orbit between the South and North Poles for its observed position on theearth (Table 3.1-1). An observed position of AMSR-E is not nadir but little forward to the satellite flight direction.
Therefore, a scan location shifts about 2.5 minutes earlier from the satellite nadir on the orbit (Figure. 3.1-1) but
its center is positioned to the satellite nadir. (Table 3.1-2, Figure 3.1-2).

The number of scans of a scene is calculated with the orbital revisit period, the total number of paths, and thescanning interval. In case of AMSR-E, the number of scans is 1979 scans in a half orbit 49.4 minutes.

1978.7 = 86400[sec/day]*16[day/rec] / 233[orbits/rec] / 1.5[sec/scan] / 2[scene/orbit] + 1[the other pole]This number will be changed under the influence of the attitude fluctuation.

Orbit Direction
Ascending Scene

Table 3.1-1 Definition of a Scene for AMSR-E
Definition
The scan including the two-poles point from the southernmost point to thenorthernmost point of a half orbit

Descending Scene

The scan including the two-poles point from the northernmost point to thesouthernmost point of a half orbit

Processing level/Frequency

Table 3.1-2 Center Position of a Scan
The number ofStart Position
observation points

Center Position

Except for 89GHz

243

1

122

89GHz

486

1

244

Except for 89GHz

196

1(24th of L1A)

99

89GHz

392

1
(48th of L1A)

197

L1A

L1B

6

Figure 3.1-1 Geometry of a scene and the flight direction of Aqua

Figure 3.1-2 Geometry of the observation points of a scan

7

3.2.

AMSR-E Level 1 Product Specification

Level 1 product of AMSR-E is one file per one scene. And a scene is extended about 10 scans at both ends forreprocessing. As a result, the number of scans of one product is about 1999 scans. At the other hand, the file of
L1B Map is produced on demand. Its projection image is the fixed size and extracted by ordered latitude. The
specification of the AMSR-E processing is shown below.

Table 3.2-1 Specification of AMSR-E level 1 products
Level

Production

1A

Planned

1B

1BMap

PlannedOn demand

Processing

The number of scans

Scanning width

Automatic /Half Orbit +243: except 89GHz

Manual Retry

Overlaps (each 10 scans at both ends)

Automatic /Half Orbit +Manual Retry

Overlaps (each 10 scans at both ends)

Near Real Time

EOC*1 receiving range only

Automatic

300 pixel * 300 pixel*1. EOC (JAXA Earth Observation Center)8486: 89GHz
196: except 89GHz
392: 89GHz

Table 3.2-2 Level of processing in AMSR-E
The state ofLevel

Processing Explanation
observation data

1A・

After sorting packets of observation data, deletes the duplicatedRaw data

packets.
・

The missing packets in the raw data (Rate Buffered Data) are filledwith dummy data.

・

12 bit and 10 bit observation datasets are converted into 16 bit 2 byte
data.

・

Calculates the conversion coefficient from the raw data to the antenna
temperature used for next step processing, L1B processing.

・

Calculates longitude/latitude of observation positions, incident angle,
the direction of sun and so on.

・Adds the information of the missing packets and another quality
information.

1B・

Adds the land/ocean flag.

・Adds the overlapped 10 scans to the start and end of a scene.

・

The raw data count values are converted into the brightness temperature
through calculating antenna temperature.

・Brightness
temperature image

The observation data range is changed to the antenna angle from –61
degrees to +61 degrees.

1B Map・

Observed brightness temperature products clipped from L1B.

Mapped brightness

・Mapping types are Mercator for under 60 degrees latitude data,

temperature image

Latitude/Longitude Equatorial for under 60 degrees latitude data andPolar Stereo for polar region over 60 degrees latitude.

9

4.
4.1.

HDF
Outline of HDF

HDF (Hierarchical Data Format) is developed by NCSA (The National Center for Supercomputing Applications;the University of Illinois) and its objects are machine- and medium- independent and physical representations ofdata and metadata. HDF can store many varieties of data structure. HDF files are equally accessible by routines
written either in FORTRAN or in C provided freely by NCSA.
4.2.

HDF File

HDF is a file that consists of the item name and value, and stores them hierarchically. The item name of a data
set is using a common name between products, and becomes a key for searching the target data. The HDF library
prepares six kinds of data models for storing data sets, and provides the interface. The suitable data model isselected based on the classification and composition of data, and the purpose. Regarding AMSR-E level 1 product,
the HDF library is version 4.2r4, and the following three data models are adopted.
•

Global Attribute

Global Attribute is used for storing attribute information of a character and a numerical value. In AMSR-E
level 1 product, this model is used for the core meta-information and product meta-information. This
information is stored as text.
•

Vdata

The Vdata is used for storing customized data records. A Vdata object is a one-dimensional array ofrecords. Each record in a Vdata object contains a set of elements, which adhere to a specifically defined
template. In AMSR-E level 1 product, this model is used for the scanning start time.
•

Scientific Data Sets (SDS)

SDS is used for storing the data of n-dimensional array. Data values in a data set are stored with standard
data type (8, 16 or 32 bits signed/unsigned integer, or 32, 64 bits floating point number). Moreover, it canhave attribute information corresponding to the data value in a SDS. In AMSR-E level 1 product, thismodel is used for all data except for the scanning start time.

10

§L1A

AMSR-E Level 1A
Product Format Description

Contents

1

EXPLANATION OF THE PRODUCT ...................................................................................................................... 1
1.1
PRODUCT STRUCTURE ......................................................................................................................................... 2
1.2
FILE STRUCTURE ................................................................................................................................................. 2
1.3
DATA SIZE OF ONE LEVEL 1A PRODUCT............................................................................................................ 28
1.4
THE OTHERS ..................................................................................................................................................... 29
1.4.1
File Name Convention ............................................................................................................................. 29
1.4.2
Definition of the Product Data Range ..................................................................................................... 29
1.4.3
Coordinate System ................................................................................................................................... 29
1.4.4
Scaling Factor.......................................................................................................................................... 29

2

DATA EXPLANATION .......................................................................................................................................... 30
2.1
2.2
2.3

CORE METADATA.............................................................................................................................................. 30
PRODUCT METADATA ....................................................................................................................................... 36
DATA ITEMS ...................................................................................................................................................... 42

L1A-i

1

Explanation of the Product

The Level 1A product stores the value of observed microwave radiation from the earth surface and it’s geometric
information as HDF. The features of the product are shown below.
•

Range of data
The level 1A product is extracted data in range of a half orbit between the South Pole and North Pole from level0 data (Science and GBAD data).

•

Observation width
The range of the observation is ±75 degrees centered at the flight direction. (See Figure 1-1.) 243 data points areobserved for each frequency below 89GHz and 486 for 89GHz.

•

Main items of stored data-

Scan time-

Count value of the antenna temperature for the earth surface observation data
(Without radiometric conversion)-

Radiometric conversion coefficients-

Count value of the temperature for HTS and CSM-

Geometric information (position, observation incidence angle, sun azimuth angle, etc.)-

Quality information-

Others (The information of the satellite, sensor, and product etc.)

Figure 1-1 The Data Range of One Scan for AMSR-E (Level 1A)

L1A-1

1.1

Product Structure

The logical structure of level 1A product is shown in Table 1-1.

Table 1-1 Logical Structure of AMSR-E Level 1A product
Structure

HDF Data Model

Contents
The general information of the product is stored. It is

Core Meta

Global Attributebased on the indispensable item of the attribute ofNASA ECS (B. 0).

Header Part

Main characteristics of AMSR-E and the conversion
Product Meta

Global Attributetable of the engineering values, etc. are stored.
The data shown below is stored.

Data Part

Vdata SDS•

Scan Time•Raw values of Observation Data•

Calibration Data•

Supplementary information(Positions, Orbits, Attitudes, Coefficients,
Observation incidence angle, the sun azimuth,
etc.)

•
1.2

Quality information

File Structure

The file structure of AMSR-E level 1A product is shown in Figure 1.2-1. The explanation for the core metadata of theheader part is shown in Table 1.2-1, and the product metadata is shown in Table 1.2-2. Moreover, the explanation foreach item of the data part shows the data size and the scale factor in Table 1.2-3, and the data structure in Figure 1.2-2- 1.2-16.

L1A-2

Level 1A ProductCore Metadata
Product Metadata（Header）（Data）In the scan
(V data)

(SDS)

Scan

(16 SDS)

Scan

Scan TimenGHz-polScan

Position in Orbit

16 pixel

Observation Count32 pixel

16 pixel

32 pixel

(SDS)

(SDS)

(SDS)

(SDS)

Scan

Hot Load Count
6 to 52

Hot Load Count89

Cold Sky Mirror Count
6 to 52

nGHz-pol (Of + Sl)

nGHz-pol (Of + Sl)

x, y, z, x', y', z'

(SDS)

(SDS)

roll, pitch, yaw
(SDS)

Scan

Scan

Antenna Temp Coef

Rx Offset/Gain Count

Navigation Datain the scanin the scanin the scan

Scan

Scan

(SDS)
Scan

(SDS)

(SDS)
Scan

Cold Sky Mirror Count
89

Attitude Datain the scan
(SDS)

Scan

(SDS)
Scan

Lat of Observation
Point Except 89B

Long of Observation
Point Except 89B

Lat of Observation
Point for 89B

Long of Observation
Point for 89B

in the scanin the scanin the scanin the scan

(SDS)

(SDS)
Scan

Scan

Sun Azimuth
6, 10, 18, 23,
36, 50, 89A

(SDS)
Scan

Sun Elevation

(SDS)
Scan

Earth Incidence

Earth Azimuth

in the scan

(SDS)

(SDS)

Scan

Scan

Land/Ocean Flagfor
6_10_18_23_36_50_89A
16 pixel

(SDS)

Scan

(SDS)

Scan

Observation
Supplement

SPC
Temperature Count32 pixelin the scan

SPS
Temperature Count

(SDS)
200

Scan

2

4

12

Interpolation Flag 6 to 52

Spill OverInterpolation Flag 89

Data Structure
Figure 1.2-1 The Data Structure

L1A-3

(SDS)
Scan

Data Quality

Table 1.2-1 Core Meta Items (1/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

ShortName
VersionID
SizeMBECSDataGranule
LocalGranuleID
ProcessingLevelID

The abbreviated name of the product
The version ID of the product
Data size of the product (Mbytes)
Product management number
ID of processing level

AMSREL1A
RELEASE336.6
P1AME020729210MD_P01A0000000
L1A

ReprocessingActual

Re-processing date (UTC)

Blank or 2002-08-10

ProductionDateTime
RangeBeginningTime
RangeBeginningDate
RangeEndingTime
RangeEndingDate
GringPointLatitude

Product creation date (UTC)Start time of observation data (UTC)Start date of observation data
End time of observation data (UTC)End date of observation data
Latitude of data effective range

GringPointLongitude

Longitude of data effective range

PGEName
PGEVersion

Data processing software name
Data processing software version

InputPointerInput file name

ProcessingCenter

Data processing center

ContactOrganizationName

Contact organization nameStartOrbitNumber
StopOrbitNumber
EquatorCrossingLongitude
EquatorCrossingDate
EquatorCrossingTime

Start orbit number
End orbit number
Longitude at the time of equatorial passage
Date of equatorial passage
Time of equatorial passage

2002-07-29T07:14:29.000Z
02:57:17.53Z
2002-07-29
03:47:06.81Z
2002-07-29
83.71,73.23,34.10,-25.31,-84.97,-73.60,-23.13,36.52
152.28,91.82,-10.34,-24.72,-39.30,-105.73,-40.70,-2
7.99
L1A_Process_Software
333*33****33330333
R1540402SGS0221003170100.RBD,
R1540402SGS0221005320100.RBD
JAXA EOC
JAXA,1401,Ohashi,Hatoyama-machi,Hiki-gun,Saita
ma,350-0393,JAPAN,+81-49-298-1307,orderdesk@
eoc.jaxa.jp
1251
1251
-28.802002-07-29
03:24:14.41Z

L1A-4

Attention

Date only set for
Re-processing(0-Fill for blank)
0-Fill for blank
0-Fill for blank
0-Fill for blank
0-Fill for blank
0-Fill for blank

Fix/
ExampleFix
ExampleExampleExampleFix
ExampleExampleExampleExampleExampleExampleExampleExampleFix
ExampleExampleFix
Fix

0-Fill for blank
0-Fill for blank

ExampleExampleExampleExampleExampleTable 1.2-1 Core Meta Items (2/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

OrbitDirection
Orbit direction
DESCENDING
EphemerisGranulePointerOrbit data file name
R1540957SGS0221003170100.RBD
EphemerisType
Type of orbit data
ELMP
PlatformShortName
Abbreviated name of Platform
EOS-PM1
SensorShortName
Sensor name
AMSR-E
NumberofScans
Number of scans
1994
NumberofMissingScans
Number of missing packets
1
ECSDataModel
Meta data model name
B.0
DiscontinuityVirtualChannelC Judgement of virtual channel unit counter
DEAD Encounter
ounterdiscontinuity
QALocationPacketDiscontinui
Judgment of packet sequence counter discontinuity discontinuationty
NumberofPackets
Number of packets
31904
NumberofInputFiles
Number of input files
2
NumberofMissingPackets
Number of missing packets
1
NumberofGoodPackets
Number of good packets
31903
ReceivingCondition
Receiving condition
Blank
EphemerisQA
Ephemeris limit check
OK
AutomaticQAFlag
Limit check by software
PASS
1.MissingDataQA:Less than 20 is available->OK,
2.AntennaRotationQA:Less than 20 isavailable->OK,
3.HotCalibrationSourceQA:Less than 20 isavailable->OK,
4.AttitudeDataQA:Less than 20 is available->OK,
AutomaticQAFlagExplanation Explanation of limit check by software
5.EphemerisDataQA:Less than 20 is available->OK,
6.QualityofGeometricInformationQA:Less than 0 isavailable->OK,
7.BrightnessTemperatureQA:Less than 20 isavailable->OK,
All items are OK, 'PASS' is employed

L1A-5

Attention

Fix/
ExampleExampleExampleExampleFix
Fix
ExampleExampleFix
ExampleExampleExampleExampleExampleExampleFix
ExampleExampleFix

Table 1.2-1 Core Meta Items (3/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

Attention

The quality flag when computing the amount ofBlankphysics
ScienceQualityFlagExplanatio Explanation of the quality flag when computing theBanknamount of physics
QAPercentMisssingData
Percentage of missing data0
QAPercentOutofBoundsData Percentage of out of bound data0
QAPercentParityErrorData
Percentage of parity error data0
ProcessingQADescription
Description of the processing error
PROC_COMP
ScienceQualityFlag

ProcessingQAAttirbute

The attribute name which is abnormal by QA
Blank or NumberofMissingPackets
metadata

L1A-6

Fix/
ExampleFix
Fix
ExampleExampleExampleExampleAn attribute name isset up only at thetime of unusual
generating.

ExampleTable 1.2-2 Product Meta Items (1/4)
Items (Attribute Name)

Explanation

Concrete Values or Examples

SatelliteOrbit
AltitudeOrbitSemiMajorAxis
OrbitEccentricity
OrbitArgumentPerigee
OrbitInclination
OrbitPeriod
RevisitTime

The kind of Satellite’s orbit
The altitude of Satellite
The orbit semi-major axis
The orbit eccentricity
The orbit argument perigee
The orbit inclination
The orbit period
Orbit recurrent days

AMSRChannel

The kind of AMSR channels

AMSRBandWidthBand width of AMSRAMSRbeamWidth

Beam width of AMSR

OffNadirOff-nadir angle

SpatialResolution(AzXEl)

Spatial resolution

ScanningPeriod
SwathWidth
DynamicRange
DataFormatType
HDFFormatVersion
EllipsoidName
SemiMajorAxisofEarth
FlatteningRatioofEarth
SensorAlignment

Scanning period
Swath width
Dynamic range
Data format typeHDF format version
Earth ellipse model
Earth equatorial radius
Flattening ratio of earth
Sensor alignment
The effective range of a thermistor engineering value
60,585,770,872,924,952,961,1023
conversion factor

ThermistorCountRangeWx

Sun-synchronous_sub-recurrent
707.9km
7085.858km
0.00095
106.480deg
98.15deg
98minutes
16days
6.925GHz,10.65GHz,18.7GHz,23.8GHz,36.5GHz,89.0GHz-A,89.0GHzB
6G-350MHz,10G-100MHz,18G-200MHz,23G-400MHz,36G-1000MHz,
50.3G-0,52G-0,89GA-3000MHz,89GB-3000MHz
6G-1.8deg,10G-1.2deg,18G-0.64deg,23G-0.75deg,36G-0.35deg,
50.3G-0,52G-0,89GA-0.15deg,89GB-0.15deg
47.0deg: 89GB, 47.5deg: others
6G-43.2kmX75.4km,10G-29.4kmX51.4km,18G-15.7kmX27.4km,23G-18.
1kmX31.5km,
36G-8.2kmX14.4km,50.3G- ,52G- ,89GA-3.7kmX6.5km,89GB-3.5kmX5.
9km
1.5sec1450km
2.7K-340K
NCSA-HDF
Ver4.2r4
WGS84
6378.1km
0.00335
Rx=0.00000,Ry=0.00000,Rz=0.00000

L1A-7

Fix/
Example
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix

Table 1.2-2 Product Meta Items (2/4)
Items (Attribute Name)
ThermistorConversionTable
Wa
ThermistorConversionTable
Wb
ThermistorConversionTable
Wc
ThermistorConversionTable
Wd
Platinum#1CountRangeWx
Platinum#1ConversionTable
Wa
Platinum#1ConversionTable
Wb
Platinum#1ConversionTable
Wc
Platinum#1ConversionTable
Wd
Platinum#2CountRangeWx
Platinum#2ConversionTable
Wa
Platinum#2ConversionTable
Wb
Platinum#2ConversionTable
Wc
Platinum#2ConversionTable
Wd

Explanation

Concrete Values or Examples

Fix/
Example0.000000,0.000015,0.000161,0.000618,0.002331,0.011459,0.010101,0.00
0000
0.000000,0.056460,-0.109878,-0.819170,-3.801865,-20.783040,-18.2121
20,0.000000-35.000000,-38.250000,9.220000,284.170000,1582.770000,9480.000000,
8263.350000,90.000000

Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

Platinum#1 count range: Wx1168,1296,1536,1752,4095

FixPlatinum#1 conversion table: Wa

0.0,0.0,0.0,0.0,0.0

Fix

Platinum#1 conversion table: Wb

0.000000,0.039000,0.042000,0.039000,0.042000

Fix

Platinum#1 conversion table: Wc-35.000000,-80.625000,-84.000000,-80.000000,-84.667000

Fix

Platinum#1 conversion table: Wd

0.0,0.0,0.0,0.0,0.0

Fix

Platinum#2 count range: Wx

272,1536,1792,2032,2288,3248,3712,4095

FixPlatinum#2 conversion table: Wa

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

Thermistor conversion table: Wa
Thermistor conversion table: Wb
Thermistor conversion table: Wc
Thermistor conversion table: Wd

Platinum#2 conversion table: Wb
Platinum#2 conversion table: Wc
Platinum#2 conversion table: Wd

0.000000,0.078300,0.078000,0.083000,0.078000,0.083000,0.085300,0.00
0000-140.000000,-161.440000,-160.000000,-169.333000,-158.750000,-170.66
7000,-177.640000,140.000000
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

L1A-8

Fix

Fix

Fix
Fix
Fix

Table 1.2-2 Product Meta Items (3/4)
Items (Attribute Name)

Explanation

Concrete Values or Examples

Platinum#3CountRangeWx
Platinum#3ConversionTable
Wa
Platinum#3ConversionTable
Wb
Platinum#3ConversionTable
Wc
Platinum#3ConversionTable
Wd

Platinum#3 count range: Wx

349,1454,2000,2555,3059,3566,4020,4095

Platinum#3 conversion table: Wa

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

CoefficientAvv

Coefficient: Avv

CoefiicientAhv

Coefficient: Ahv

CoefficientAov

Coefficient: Aov

CoefficientAhh

Coefficient: Ahh

CoefficientAvh

Coefficient: Avh

CoefficientAoh

Coefficient: Aoh

CSMTemperature

Brightness temperature of deep space

CoRegistrationParametererA1
CoRegistrationParametererA2

Platinum#3 conversion table: Wb
Platinum#3 conversion table: Wc
Platinum#3 conversion table: Wd

Co-registration parameter: A1
Co-registration parameter: A2

0.000000,0.009100,0.009100,0.009100,0.009900,0.009900,0.008500,0.00
0000
0.000000,6.845000,6.803800,6.803800,4.719500,4.719500,9.835000,44.0
00000
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix/
Example
Fix
Fix
Fix
Fix
Fix

6G-1.037,10G-1.032,18G-1.025,23G-1.032,36G-1.029,50G-0.000,52G-0.
Fix
000,89GA-1.025,89GB-1.029
6G--0.003,10G--0.003,18G--0.003,23G--0.004,36G--0.004,50G-0.000,52
Fix
G-0.000,89GA--0.003,89GB--0.004
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52
Fix
G-0.000,89GA--0.022,89GB--0.024
6G-1.037,10G-1.031,18G-1.025,23G-1.034,36G-1.029,50G-0.000,52G-0.
Fix
000,89GA-1.028,89GB-1.031
6G--0.003,10G--0.002,18G--0.003,23G--0.006,36G--0.004,50G-0.000,52
Fix
G-0.000,89GA--0.006,89GB--0.006
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52
Fix
G-0.000,89GA--0.022,89GB--0.024
6GV-2.800, 6GH-2.800, 10GV-2.800, 10GH-2.800, 18GV-2.800,
18GH-2.800, 23GV-2.800, 23GH-2.800, 36GV-2.800, 36GH-2.800,
Fix
50GV-0.000, 52GV-0.000, 89GAV-2.800, 89GAH-2.800, 89GBV-2.800,
89GBH-2.800
6G-1.10450, 10G-0.65040, 18G-0.67990, 23G-0.74050, 36G-0.68490,
Example50G-0.00000
6G--1.04960, 10G--0.64760, 18G--0.20170, 23G--0.26610, 36G--0.21810,
Example50G-0.00000

L1A-9

Table 1.2-2 Product Meta Items (4/4)
Items (Attribute Name)

Explanation

CalibrationCurve
Coefficient#1

The radiometric correction coefficient for the
0th order

CalibrationCurve
Coefficient#2

The radiometric correction coefficient for the
1st order

CalibrationCurve
Coefficient#3

The radiometric correction coefficient for the
2nd order

CalibrationCurve
Coefficient#4

The radiometric correction coefficient for the
3rd order

CalibrationCurve
Coefficient#5

The radiometric correction coefficient for the
4th order

Concrete Values or Examples

6GV--0.2099101, 6GH--0.2054645, 10GV--0.0580782, 10GH--0.0103279,
18GV--0.0853578,
18GH--0.0435186,
23GV--0.1288643,
23GH--0.1288643,
36GV--0.0475611,
36GH--0.0536047, Example
50GV-0.0000000,
52GV-0.0000000,
89GAV--0.0278573,
89GAH--0.0447590, 89GBV--0.0273764, 89GBH--0.0316265
6GV-1.0756783, 6GH-1.0740756, 10GV-1.0209393, 10GH-1.0037236,
18GV-1.0307711, 18GH-1.0156885, 23GV-1.0464586, 23GH-1.0464586,
36GV-1.0171470, 36GH-1.0193259, 50GV-0.0000000, 52GV-0.0000000, Example
89GAV-1.0100426,
89GAH-1.0161356,
89GBV-1.0098693,
89GBH-1.0114014
6GV--0.0002537, 6GH--0.0002483, 10GV--0.0000704, 10GH--0.0000125,
18GV--0.0001022,
18GH--0.0000522,
23GV--0.0001556,
23GH--0.0001556,
36GV--0.0000575,
36GH--0.0000648, Example
50GV-0.0000000,
52GV-0.0000000,
89GAV--0.0000334,
89GAH--0.0000537, 89GBV--0.0000329, 89GBH--0.0000379
6GV-0.0000000, 6GH-0.0000000, 10GV-0.0000000, 10GH-0.0000000,
18GV-0.0000000, 18GH-0.0000000, 23GV-0.0000000, 23GH-0.0000000,
Example36GV-0.0000000, 36GH-0.0000000, 50GV-0.0000000, 52GV-0.0000000,
89GV-0.0000000, 89GH-0.0000000
6GV-0.0000000, 6GH-0.0000000, 10GV-0.0000000, 10GH-0.0000000,
18GV-0.0000000, 18GH-0.0000000, 23GV-0.0000000, 23GH-0.0000000,
Example36GV-0.0000000, 36GH-0.0000000, 50GV-0.0000000, 52GV-0.0000000,
89GV-0.0000000, 89GH-0.0000000
RxTemperatureReferenced,SpillOver,CSMInterpolation,
Absolute89GPositioning,NonlinearityCorrection
Example* RxTemperatureReferenced may be changed into HTUCoefficients or
ElectromagneticAnalysis
ver0002
ExampleCalibrationMethod
Calibration method name
HTSCorrectionParameter
VersionSpillOverParameterVersion
CSMInterpolationParameter
VersionAbsolute89Gpositioning
ParameterVersion

Fix/
ExampleParameter version of the HTS correction.
Parameter version of the CSM spill over correction
Parameter version of the CSM interpolation correction

ver0001
ver0001

Parameter version of the correction for absolute ver0002
positions of 89 GHz

L1A-10

ExampleExampleExampleTable 1.2-3
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Items
Scan_Time
Position_in_Orbit
Navigation_Data
Attitude_Data
6GHz-V_Observation_Count
6GHz-H_Observation_Count
10.65GHz-V_Observation_Count
10.65GHz-H_Observation_Count
18.7GHz-V_Observation_Count
18.7GHz-H_Observation_Count
23.8GHz-V_Observation_Count
23.8GHz-H_Observation_Count
36.5GHz-V_Observation_Count
36.5GHz-H_Observation_Count
50.3GHz-V_Observation_Count
52.8GHz-V_Observation_Count
89.0GHz-V-A_Observation_Count
89.0GHz-V-B_Observation_Count
89.0GHz-H-A_Observation_Count
89.0GHz-H-B_Observation_Count

Data Items, Sizes and Scaling Factors (1/2)

Byte
8
8
6*4
3*4
2
2
2
2
2
2
2
2
2
2
#1
2
#1
2
2
2
2
2

Type
doubledoublefloat
float
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int
signed int#1: 50GHz and 52GHz are filled with 0 for AMSR-E.

L1A-11

Scaling factor
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0

No. of samples per scan
1
1
6
3
243
243
243
243
243
243
243
243
243
243
243
243
486
486
486
486

Units
sec
m,m/s
deg
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count
Count

Dimension
nscan
nscan
nscan
nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan
486*nscan
486*nscan
486*nscan
486*nscan

No.
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

Table 1.2-3 Data Items, Sizes and Scaling Factors (2/2)
Items
Byte
Type
Scale factor
No. of samples per scan
Hot_Load_Count_6_to_52
2
signed int
1.0
16
Hot_Load_Count_89
2signed int
132
Cold_Sky_Mirror_Count_6_to_52
2
signed int
1
16
Cold_Sky_Mirror_Count_89
2signed int
132
Antenna_Temp_Coef(Of+Sl )
4
float
1
32
Rx_Offset/Gain_Count2
unsigned int
132
Lat_of_Observation_Point_Except_89B2
signed int
0.01
486
Long_of_Observation_Point_Except_89B2
signed int
0.01
486
Lat_of_Observation_Point_for_89B2
signed int
0.01
486
Long_of_Observation_Point_for_89B2
signed int
0.01
486
Sun_Azimuth
2
signed int
0.1
243
Sun_Elevation2
signed int
0.1
243
Earth_Incidence#2
1
signed char
0.02
243
Earth_Azimuth
2
signed int
0.01
243Land/Ocean_Flag_for_ 6_10_18_23_36_50_89A
1
unsigned char
1
243
Observation_Supplement
2
1
27
SPC_Temperature_Count2
unsigned int
1
20
SPS_Temperature_Count2
unsigned int
132
Data_Quality
4
float
1
128
Interpolation_Flag6_to_52
1
1
16Interpolation_Flag_89
1
1
32
Spill_Over
4
float
1
243

#2: The Earth Incidence has also sub-attribute “OFFSET”. This offset is set to 55.0.

L1A-12

Units
Count
Count
Count
Count
K+K/Cnt
Count
deg
deg
deg
deg
deg
deg
deg
deg
%
Count
Count
mV

Dimension
16*nscan*12
32*nscan*4
16*nscan*12
32*nscan*4
32*nscan
32*nscan
486*nscan
486*nscan
486*nscan
486*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan*7
27*nscan
20*nscan
32*nscan
128*nscan
16*nscan*12
32*nscan*4
243*200scan*2

Pixel(0,0)

The 243rd observation point

The second observation point

Scan(242,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)(242,n-1)

6GHz-V Observation Count(6-H, 10-V/H, 18-V/H, 23-V/H, 36-V/H, 50-V, 52-V have the same structure)(Note: 50GHz-V, 52GHz-V SDSs are filled with 0)

Pixel
(0,0)

The 486th observation point

The second observation point

Scan(485,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)(485,n-1)

89GHzA-V Observation Count(89A-H, 89B-V/H have the same structure)

Figure 1.2-2 The Structure of Observation Count

L1A-13

Figure 1.2-3 The Structure of Hot Load Count, Cold Sky Mirror Count

L1A-14(5,0)(0,0)
Scan No. 1

X

Y

Z

X'

Y'

Z'

4 byteScan

Scan No. n(Nominal: 1996~2000)(0,n-1)

Navigation Data
(2,0)

(0,0)
Scan No. 1

Roll(5,n-1)

Pitch

Yaw

4 byteScan

Scan No. n(Nominal: 1996~2000)(0,n-1)(2,n-1)
Attitude Data

Figure 1.2-4 The Structure of Navigation Data, Attitude Data

L1A-15

Figure 1.2-5 The Structure of Antenna Temp Coef.

L1A-16

Figure 1.2-6 The Structure of Rx Offset/Gain Count

L1A-17

Pixel(0,0)

The 486th observation point

The second observation point

Scan(485,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)

Lat. of Observation Point Except 89B
Long. of Observation Point Except 89B(485,n-1)(Latitude and Longitude have the same structure.)

Pixel
(0,0)

The 486th observation point

The second observation point

Scan(485,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)

Lat. of Observation Point for 89B
Long. of Observation Point for 89B(485,n-1)

Figure 1.2-7 The Structure of Lat. of Observation Point, Long. of Observation Point

L1A-18Pixel(0,0)

The 243rd observation point

The second observation point

Scan(242,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)Sun Azimuth(242,n-1)

Pixel
(0,0)

The 243rd observation point

The second observation point

Scan(242,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)Sun Elevation(242,n-1)

Figure 1.2-8 The Structure of Sun Azimuth, Sun Elevation

L1A-19Pixel(0,0)

The 243rd observation point

The second observation point

Scan(242,0)

1 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)

Earth Incidence(242,n-1)

Pixel
(0,0)

The 243rd observation point

The second observation point

Scan(242,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)

Earth Azimuth(242,n-1)

Figure 1.2-9 The Structure of Earth Incidence, Earth Azimuth

L1A-20Figure 1.2-10 The Structure of Land/Ocean Flag

L1A-21

Figure 1.2-11 The Structure of Observation Supplement

L1A-22

Figure 1.2-12 The Structure of SPC Temperature Count (0-19)

L1A-23

Figure 1.2-13 The Structure of SPS Temperature Count (0-31)

L1A-24

256 byte

4 byte64 byte132 byte

40 byteQuality fora ScanCalibration
Data Quality

SPS/SPC Error
Summary

HTS
Temperature

Parity Error
SummarySpace

512 byte
16 byteQuality for a Scan
4 byte16 byte4 byte4 byte4 byte4 byteDirectionofSun

DirectionofMoon

Quality
Information
for a scan

Tacho
Pulse
Count

1 bit

MSB

LSB

No.16, No.15, .....

....,No2, No.1

Quality of Packet 1 to 16 (0: OK, 1: NG)
HTS Temperature Check (0: OK, 1: NG)
GPSR Count Check (0: OK, 1: NG)

Calibration Data Quality
16 byte16 byte16 byte4 byte4 byte4 byte4 byte6GHz-V
Quality

6GHz-H
Quality

89GHzB-H
Quality

256 byte
16 byte

CSM
Mean

Hot
Load
Mean

CSM
Standard
Deviation

Hot
LoadStandard
Deviation

Each Frequency (50GHz-V, 52GHz-V is always 0.0 for AMSR-E)

HTS Temperature

SPC/SPS Error Flag

4 byte89GHzB-H[K]

4 byte6GHz-H[K]

SPC/SPSError
Flag

4 byte6GHz-V[K]

64 byte4 byte(50GHz-V, 52GHz-V is always 0.0 for AMSR-E)

Parity Error Summary
4 byte4 byte89GHzB-H
Error CountHTS
PrimaryCount

4 byte6GHz-H
Error Count

CSM
PrimaryCount

64 byte64 byte

6GHz-V
Error Count

64 byteRX
Gain/Offset

64 byte4 byte(50GHz-V, 52GHz-V is always 0.0 for AMSR-E)

Spare
40 byteSpare

Figure 1.2-14

The Structure of Data Quality

L1A-25

Figure 1.2-15

The Structure of Interpolation Flag

L1A-26

Figure 1.2-16

The Structure of Spill Over

L1A-27

1.3

Data Size of one Level 1A ProductThe data size of one AMSR-E level 1A product file is shown in Table 1.3-1 in case of 2000 scans. However, theactual file size is 8% smaller because HDF is a compressed format.
Table 1.3-1 Estimation of the Data Volume
AMSR-E Product Data Size
Item
Scan Time
Position in Orbit
6GHz-V Observation Count
6GHz-H Observation Count
10.65GHz-V Observation Count
10.65GHz-H Observation Count
18.7GHz-V Observation Count
18.7GHz-H Observation Count
23.8GHz-V Observation Count
23.8GHz-H Observation Count
36.5GHz-V Observation Count
36.5GHz-H Observation Count
50.3GHz-V Observation Count
52.8GHz-H Observation Count
89.9GHz-V-A Observation Count
89.9GHz-H-A Observation Count
89.9GHz-V-B Observation Count
89.9GHz-H-B Observation Count
Hot Load Count 6 to 52
Hot Load Count 89
Cold Sky Mirror Count 6 to 52
Cold Sky Mirror Count 89
Antenna Temp Coef (Of + Sl)
Rx Offset/Gain Count
Navigation Data
Attitude Data
Lat of Observation Point Except 89B
Long of Observation Point Except 89B
Lat of Observation Point for 89B
Long of Observation Point for 89B
Sun Azimuth
Sun Elevation
Earth Incidence
Earth Azimuth
Land/Ocean Flag
Observation Support
SPC Temperature CountSPS Temperature Count
Data Quality
Interpolation_Flag 6 to 52
Interpolation_Flag 89
Spill Over
Total
Volume/Granule ( MB )Volume/Day ( GB )Volume/Month ( GB )No. ofSamples
1
1
243
243
243
243
243
243
243
243
243
243
243
243
486
486
486
486
16
32
16
32
32
32
6
3
486
486
486
486
243
243
243
243
243
27
20
32
512
16
32
243

L1A-28

No. of
Bytes

Semi Total
8
8
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
4
2
4
4
2
2
2
2
2
2
1
2
1
2
2
2
4
1
1
4

Remark

8
8
486
486
486
486
486
486
486
486
486
486
486
486
972
972
972
972
384 (16*2) * 12 freq
256 (32*2) * 4 freq
384 (16*2) * 12 freq
256 (32*2) * 4 freq
128
64
24
12
972
972
972
972
486 A scan only
486 A scan only
243 A scan only
486 A scan only
1701 1*7 for 6,10,23,37,50,89A
54
40
64
2048
192 (16*1) * 12 freq
128 (32*1) * 4 freq
1944 * 2 freq * 200 Scans
23004
40.5 2000 Scan/Scene
1.1 29 Files/Day
34.4 30 Days/Month

1.4
1.4.1

The Others
File Name Convention

The file name convention of AMSR-E level 1 product (1A, 1B, 1BMap) is shown below. The Granule ID obeys the
Granule ID convention in Earth Observation Center of JAXA.

GranuleID + Extensions(.00)

1.4.2

Definition of the Product Data Range

The data range of AMSR-E level 1 product (only in case of 1A and 1B) is the half orbit defined as a scene (Figure
1.4.2-1) and extended about 10 scans at both ends. The both ends of a half orbit correspond to the maximum andminimum latitude of the observation point at the center of the scan.

Figure 1.4.2-1
1.4.3

Definition of One Product Range

Coordinate System

AMSR-E level 1 product (1A, 1B) stores observation position (latitude, longitude) and orbit information of satellite.
An observation position is expressed in Greenwich coordinate system (Earth Fixed Coordinate). The range of theeast longitude is from 0 to 180 degrees and the range of the west longitude is from 0 to -180 degrees. Similarly, therange of the north latitude is from 0 to 90 degrees, the range of the south latitude is from 0 to -90 degrees. Earth modelof WGS84 is adopted for geometric calculation. On the other hand, the orbit information is stored as the inertia
coordinate system of J2000.0.
1.4.4

Scaling Factor

In order to make data volume small, scaling factors are applied for some floating number in AMSR-E level 1 product(1A, 1B). The scale factor is stored with the data unit in the attribute information on Vdata or SDS.

L1A-292

Data Explanation

This chapter shows explanation of each data item of AMSR-E level 1A product including common items for level 1Band level 1BMap.
2.1

Core Metadata（1）

ShortName

The abbreviated name of a product is stored. The fixed abbreviated names of each processing level are shown below.
AMSREL1AAMSREL1B
AMSREL1M（2）

Level 1A
Level 1B
Level 1B Map

VersionID“RELEASEx” (x is version ID) is stored as the product version.

（3）

SizeMBESDataGranule

The size (Mbytes) of the product is stored.

（4）

LocalGranuleID

The Granule ID based on JAXA EOC ID convention is stored. The Granule ID for level 1A is as follows.
P1AMEYYMMDDPPPMX_KNLL0000000[Scene ID]
P1
P1 (Fixed: EOS-PM1 Aqua)
AME
AME (Fixed: AMSR-E)
YYMMDD
Date of data acquisition start (UT)PPP
Path number at the observation start point (001 – 233)
M
M or R (M: regular process / re-process, R: near real time process)X
A or D (Orbit direction, A: Ascending, D: Descending)[Product ID]
K
P or L (P: regular process / re-process, L: near real time process)N
0 (Fixed: Spare)LL
1A (Fixed: for level 1A)
0000000
0 (Fixed: Spare)（5）

ProcessingLevelID

The processing level is stored. ID of each processing level is shown below.
L1A
L1B
L1M

（6）

Level 1A
Level 1B
Level 1B Map

ReprocessingActual

The re-processing date (UT) is stored in case of using a level 1A product itself. A blank is stored in other cases.

（7）

ProductionDateTime

The production time (UT) is stored.

L1A-30（8）RangeBeginningTime, RangeBeginningDate, RangeEndingTime, RangeEndingDate

The observation start and end time of 89 GHz A-horn’s observation are stored. The start and end time of the productare the scan beginning time of the southernmost and northernmost point, which does not contain extended scans.
However, in the case of a short size product that does not include a pole region, the scanning time of each end isstored.

（9）

GringPointLatitude, GringPointLongitude

Eight representative latitude and longitude of the outline for the observation are stored. They are set as a clockwisefrom the scanning start position, and these positions are observation points of 89 GHz A-horn. Since the spatial
information in a product cannot be expressed as a rectangle on the equidistant cylindrical projection map, it isexpressed in polygon like "G" (Figure 2.1-1).

Figure 2.1-1 The combination of the Gring

L1A-31（10）PGEName

The product generation software name is stored. The name of each processing level is shown below.
L1A_Process_Software
L1B_Process_Software
L1BMap_Process_Software（11）

Level 1A
Level 1B
Level 1B Map

PGEVersion

The version number of the AMSR-E level 1 processing system is stored. The version number consists of four
versions shown below, and total is 18 characters.

System version (10 characters) + Level 1 software version (3 characters)+ Algorithm version (3 characters) + System parameters version (2 characters)（12）

InputPointerThe science data file names used for processing are stored.

（13）

ProcessingCenter, ContactOrganizationName

The contact of JAXA/EOC is stored as the offer organization of the level 1 product.

（14）

StartOrbitNumber, StopOrbitNumber

The orbit number of the satellite in a start/end position for a product is stored. The orbit number of AMSR-E issequential from the Aqua launch.

（15）

EquatorCrossingLongitude, EquatorCrossingDate, EquatorCrossingTime

The equator crossing longitude, date and time (UT) are stored. However, if the satellite does not pass through anequator (like near real time product or short product by the lack of observation data), it is filled with "*".

（16）

OrbitDirection

The direction (ASCENDING/DESCENDING) of the product is stored.

（17）

EphemerisGranulePointerThe orbit data file names used for processing are stored.

（18）

EphemerisType

The type of orbit information used for processing is stored. The abbreviation is shown below.
ELMP
ELMD

The predictive ephemeris (when using GBAD)
The definitive ephemeris (when using DEFEPHEM )L1A-32（19）PlatformShortName, SensorShortName

The abbreviated name of the satellite (platform) and the observation sensor is stored.

（20）

NumberofScans

The number of scans of the observation data in the product is stored. It contains the additional scans of each 10 scansat start/end part as shown in Figure 1.4.2-1.

（21）

NumberofMissingScans

The number of missing scans in the product is stored. Though one scan of AMSR-E consists of 16 packets, it counts
one missing scan even if one packet is lost. (The missing packet position is stored in DataQuality shown in 2.3)

（22）

ECSDataModel

The fixed value “B.0” is stored as the version of metadata model defined in ECS.

（23）

DiscontinuityVirtualChannelCounter

It represents the status of continuous receiving of inputted Science data's packets, and stored value is shown below. In
case of Science RBD, AMSR-E processing software copies the status flag of ESH (EDOS Service Header in thescience RBD file). And in case of PDS, AMSR-E processing software sets the result of checking data.
Continuation
Discontinuation
DEAD Encounter

Continuation
Discontinuation (Anomaly)
Encountered DEAD

(RBD / PDS)(RBD only)(RBD/PDS)RBD: It indicates Rate Buffered Data, and 20 bytes data (it is called ESH: EDOS Service Header) are inserted to every
packets. RBD is acquired from NASA to EOC online.
PDS: It indicates Production Data Sets, and ESH are removed. PDS stores about 2 hour data and they are delivered fromNASA to EOC via media on demand.

（24）

QALocationPacketDiscontinuity

The packet continuity state of the product is stored. The continuity state of the packet is the value shown in thefollowing.

（25）

NumberofPackets

The total packet number of the product is stored. Since one scans are 16 packets, the relation between
NumberofPackets and NumberofScan are shown in below.
NumberofPackets = NumberofScan * 16 packets（26）

NumberofInputFiles

The number of science data files used for processing is stored. It is corresponding to the number of files stored in
InputPointer.

L1A-33（27）NumberofMissingPackets, NumberofGoodPackets

The number of missing packets and the number of normal packets in the product are stored. The relation between the
total packets number and these attributes are as follows.
NumberofPackets = NumberofMissingPackets + NumberofGoodPackets（28）

ReceivingCondition

The blank is stored.
（29）

EphemerisQA

The quality judged by the checking orbit data and attitude data is stored. The quality inspection result becomes NG,
when either number of following limit check errors exceeds 20 % of the data. And it becomes OK in other cases.

Check the orbit data:

LowerLimit ≦ R ≦ UpperLimitR=

X 2 +Y2 + Z2

Check the attitude data:

LowerLimit ≦ Roll , Pitch, Yaw ≦ UpperLmit（30）

AutomaticQAFlag

The automatic inspection result of data processing is stored. The items of the automatic inspections are shown in theattribute “AutomaticQAFlagExplanation”. And the following value is stored.
PASS
FAIL
FAIL

（31）

Good
Poor
NG

(When all check items are in the state of ‘OK’.)(When some check items are in the state of ‘NG’.)(When all check items are in the state of ‘NG’.)AutomaticQAFlagExplanation

The contents of automatic inspection and its thresholds are stored.
1.MissingDataQA:Less than 20 is available->OK,
2.AntennaRotationQA:Less than 20 is available->OK,
3.HotCalibrationSourceQA:Less than 20 is available->OK,
4.AttitudeDataQA:Less than 20 is available->OK,
5.EphemerisDataQA:Less than 20 is available->OK,
6.QualityofGeometricInformationQA:Less than 0 is available->OK,
7.BrightnessTemperatureQA:Less than 20 is available->OK,
All items are OK, 'PASS' is employed（32）

ScienceQualityFlag, ScienceQualityFlagExplanation

The blank is stored for level 1.

L1A-34（33）QAPercentMissingData

The percentage of the missing data in a product is stored.
* Missing observation data is set to '-9999' in SDS.

（34）

QAPercentOutofBoundsData

The percentage of the limit error to all data is stored. It is judged as error when the antenna temperature andbrightness temperature exceed the limit value.
* In the level 1A product, since brightness temperature conversion is not executed, it is filled with 0.
* In the level 1B product, abnormal brightness temperature is stored as negative value.

（35）

QAPercentParityErrorData

The percentage of a parity error data to all data is stored. It is judged as error whether the parity error flag exists in theraw observation data (Figure 2.1-2.).
* When the observation data has a parity error, -32768 is stored in the level 1B product.
(MSB)
15
P1 P2 E

(LSB)
0

Fix

(12 bit data ： Observation data of 6 GHz)

0

Parity Flag (0 : Normal)
bit 0 ～ 6 : Odd Parity
bit 7 ～ 13 : Odd Parity(MSB)
15
P1 P2 E

(LSB)
0

Fix
0

1

Parity Flag (0 : Normal)

1(10 bit data ： Observation data except 6 GHz)Fix

bit 0 ～ 6 : Odd Parity
bit 7 ～ 13 : Odd Parity

Figure 2.1-2 Bit formats of observation data (raw data)（36）

ProcessingQADescription

The error message generated by data-processing software is stored. "PROC_COMP" is stored when processing
software is completed normally.

（37）

ProcessingQAAttribute

As the quality information of the processed data, the item name corresponding to the following standard of theanomaly judgment is stored.

Items

Anomaly standard

NumberofMissingPackets

In case of the lack of more than one packet

EphemerisQA

In case of NG

QAPercentMissingData

In case of more than 1 %QAPercentOutofBoundsData

In case of more than 1 %QAPercentParityErrorData

In case of more than 1 %L1A-35

2.2(1)

Product Metadata
SatelliteOrbit, Attitude, OrbitSemiMajorAxis, OrbitEccenticity, OrbitArgumentPerigee, OrbitInclination,
OrbitPeriod, RevisitTime

The characteristics of Aqua are stored.

(2)

SatelliteOrbit

Sun-synchronous_sub-recurrent

Altitude707.9 kmOrbitSemiMajorAxis

7085.858 km

OrbitEccentricity

0.00095

OrbitArgumentPerigee

106.480 degrees

OrbitInclination

98.15 degrees

OrbitPeriod

98 minutes

RevisitTime

16 days

AMSRChannel, AMSRBandWidth, AMSRBeamWidth, OffNadir, SpatialResolution(AzXEl)

The characteristics of AMSR-E are stored.

AMSRChannel

Observing channels of AMSR-E are set.

AMSRBandWidth

Bandwidth for each frequency is set.

AMSRBeamWidth

Beam width for each frequency is set.

OffNadirThe off nadir angle of 89 GHz A-horn and 89 GHz B-horn are set.

SpatialResolution(AzXEl)

6G-43.2kmX75.4km ,10G-29.4kmX51.4km ,18G-15.7kmX27.4km ,23G-18.1kmX31.5km ,36G-8.2kmX14.4km ,50.3G- ,52G- ,89GA-3.7kmX6.5km ,89GB-3.5kmX5.9km(3)ScanningPeriod

Scanning period is set.

1.5 sec

SwathWidth

Swath width is set.

1450 kmDynamicRange

Dynamic range is set.

2.7 – 340 K

DataFromatType, HDFFormatVersion

The file format information of a product is stored.

(4)

DataFromatType

NCSA-HDF

AMSR-E Product Format TypeHDFFormatVersion

Ver4.2r4

Version number of HDF Format

EllipsoidName, SemiMajorAxisofEarth, FlatteningRatioofEarth

The earth model used in AMSR-E data processing software is stored.

EllipsoidName

The earth ellipsoid name:

WGS84:

SemiMajorAxisofEarth

The semi major axis of the earth

6378.1km

FlatteningRatioofEarth

The flattening ratio of the earth

0.00335

L1A-36(5)SensorAlignment

Alignment values between Aqua body coordinate system and the AMSR-E coordinate system are stored.

(6)

Thermistor

The engineering conversion coefficients for the thermistor and those applicable ranges are stored.
Thermistor Count

Range Wx

Thermistor conversion table applied range.

Thermistor Conversion

Table Wa

Thermistor conversion coefficients Wa.

Thermistor Conversion

Table Wb

Thermistor conversion coefficients Wb.

Thermistor Conversion

Table Wc

Thermistor conversion coefficients Wc.

Thermistor Conversion

Table Wd

Thermistor conversion coefficients Wd.

The formula of conversion from count to engineering value is:EngineeringValue[ K ] = Wai ⋅C 2 + Wbi ⋅ C + Wci + Wdi + 273.15
C
i

(7)

: Count: Wxi −1 ≦ C ≦ Wxi

Platinum#1

The engineering conversion coefficients for the platinum sensor #1 and those applicable ranges are stored.
Platinum#1 Count

Range Wx

Platinum #1 Table applied range.

Platinum#1Conversion

Table Wa

Platinum #1 conversion coefficients Wa.

Platinum#1Conversion

Table Wb

Platinum #1 conversion coefficients Wb.

Platinum#1Conversion

Table Wc

Platinum #1 conversion coefficients Wc.

Platinum#1Conversion

Table Wd

Platinum #1 conversion coefficients Wd.

The conversion formula is the same as that for Thermistor.

(8)

Platinum#2

The engineering conversion coefficients for the platinum sensor #2 and those applicable ranges are stored.
Platinum#2 Count

Range Wx

Platinum #2 Table applied range.

Platinum#2 Conversion

Table Wa

Platinum #2 conversion coefficients Wa.

Platinum#2 Conversion

Table Wb

Platinum #2 conversion coefficients Wb.

Platinum#2 Conversion

Table Wc

Platinum #2 conversion coefficients Wc.

Platinum#2 Conversion

Table Wd

Platinum #2 conversion coefficients Wd.

The conversion formula is the same as that for Thermistor.

L1A-37(9)Platinum#3

The engineering conversion coefficients for the platinum sensor #3 and those applicable ranges are stored.
Platinum#3 Count

Range Wx

Platinum #3 Table applied range.

Platinum#3 Conversion

Table Wa

Platinum #3 conversion coefficients Wa

Platinum#3 Conversion

Table Wb

Platinum #3 conversion coefficients Wb

Platinum#3 Conversion

Table Wc

Platinum #3 conversion coefficients Wc

Platinum#3 Conversion

Table Wd

Platinum #3 conversion coefficients Wd

The conversion formula is the same as that for Thermistor.

(10)

CoefficientA (CoefficientAvv, CoefficientAhv, CoefficientAov, CoefficientAhh, CoefficientAvh,
CoefficientAoh)

The conversion coefficients in each frequency are stored for the brightness temperature. The coefficients are used forchanging the antenna temperature (Ta) of observation data into the brightness temperature (Tb). Brightness
temperature is computed by the following formula, which is different to polarizations.
Tbv = Avv Tav + Ahv Tah + 2.7 Aov
Tbv: The observation brightness temperature of the vertical polarization.
Tav: The antenna temperature of the vertical polarization.
Tah: The antenna temperature of the horizontal polarization.
Avv: The conversion coefficient of the vertical co-polarization.
Ahv: The conversion coefficient of the vertical cross-polarization.
Aov: The coefficient of the deep space’s brightness temperature of the vertical polarization.
Tbh = Ahh Tah + Avh Tav + 2.7 Aoh
Tbh: The observation brightness temperature of the horizontal polarization.
Tav: The antenna temperature of the vertical polarization.
Tah: The antenna temperature of the horizontal polarization.
Avh: The conversion coefficient of the horizontal cross-polarization.
Ahh: The conversion coefficient of the horizontal co-polarization.
Aoh: The coefficient of the deep space’s brightness temperature of the horizontal polarization.

(11)

CSMTemperature

The antenna temperature of the deep space is stored for each frequency. The stored value is used as a conversion
factor in data-processing software.

L1A-38(12)CoRegistrationParameterA1, CoRegistrationParameterA2

The co-registration parameters A1 and A2 are stored for each frequency. The co-registration parameters are used for
calculating the position (latitude and longitude) of the observing point for each frequency except 89 GHz. The
latitude and longitude of each frequency (except 89 GHz) are calculated by the method shown below. The
observation position Pt [m] of the m-th point in each scan is calculated by observation position of odd-numbered
points (origin 1) P [2m-1] of 89 GHz A-horn and observation position of even-numbered points P [2m]. The elementsof vectors of Pt [m], ex, ey, and ez, are shown in the following formula.


ex = p1
 
P1 × P2
ez =  
P1 × P2
ey = ez × ex 
cos θ = P1 • P2
P1 : The vector of observation point P[2m − 1]P2 : The vector of observation point P[2m]

Figure 2.2-1 the definition of the vector ex, ey, ez.
The ex is the vector of the odd-numbered observation point of 89 GHz A-horn from the earth center, and the ey
is the rectangular vector to the ex in a plane including the next observation point of 89GHz A-horn. And, the ez
is a rectangular vector to ex and ey. Here, A1 is defined as the co-registration parameter of the ex-ey plane, andA2 is defined as the co-registration parameter of the ex-ez plane, then the observation position of frequency
except 89 GHz is calculated by the following formula.

Pt[m] = cos( A2 ⋅ θ ) ⋅ (cos( A1 ⋅ θ ) ⋅ ex + sin( A1 ⋅ θ ) ⋅ ey ) + sin( A2 ⋅ θ ) ⋅ ez

L1A-39(13)CalibrationCurveCoefficient#1, CalibrationCurveCoefficient#2, CalibrationCurveCoefficient#3,
CalibrationCurveCoefficient#4, CalibrationCurveCoefficient#5

The coefficients of radiometric correction are stored for nonlinear calibration of the antenna temperature in eachfrequency. Nonlinear calibration is performed by the following formula.
CalibrationCurveCoefficient#1

C0

The coefficient for 0-th order

CalibrationCurveCoefficient#2

C1

The coefficient for 1st order

CalibrationCurveCoefficient#3

C2

The coefficient for 2nd order

CalibrationCurveCoefficient#4

C3

The coefficient for 3rd order

CalibrationCurveCoefficient#5

C4

The coefficient for 4-th order

Ta = C0 + C1 Ta' + C2 (Ta')2 + C3 (Ta')3 + C4 (Ta')4
Ta : Nonlinear calibrated antenna temperature [K]Ta' : The antenna temperature calculated with antenna temperature coefficients [K]*The calculation of antenna temperature with antenna temperature coefficients is shown at
Antenna_Temperature_Coef (Of+Sl).

(14)

CalibrationMethod

The following every adopted calibration methods are stored. When no methods are adopted, the blank is stored.

Target Data

Calibration Method Name

Explanation

HTUCoefficients
Observation data of highElectromagneticAnalysis

HTS calibration method is chosen one of three.

temperature calibrator (HTS)
RxTemperatureReferenced
This is used for removing the ground radiation
SpillOvereffect on CSM at 6 GHz.
Observation data of low
This is used for removing the moon light effect,

temperature calibrator (CSM)
CSMInterpolation

the interference of radio frequency, and the straylight from the sun on CSM.

Geometric information

Absolute89GPositioning

Antenna temperature

NonlinearityCorrection

This is used for geometric correction of 89 GHz.
This is used for the nonlinear calibration of theantenna temperature.

(15)

HTSCorrectionParameterVersion

The version of the parameter file used in order to calibrate the temperature of HTS is stored as 4 characters (XXXX).
The kinds of calibration are shown in CalibrationMethod. When this calibration is not performed, it is filled with "*".

L1A-40(16)SpillOverParameterVersion

The version of the parameter file used in order to calibrate the ground radiation mixed into the 6 GHz CSM data isstored as 4 characters (XXXX). When this calibration is not performed, it is filled with "*".

(17)

CSMInterpolationParameterVersion

The version of the parameter file used in order to calibrate the following items for CSM data is stored as 4 characters(XXXX). When this calibration is not performed, it is filled with "*".

(18)

Absolute89GpositioningParameterVersion

The version of the parameter file used in order to correct the 89 GHz position information is stored as 4 characters(XXXX). When the position information is not corrected, it is filled with "*".

L1A-41

2.3(1)

Data Items
Scan_Time

The observation start time of 89GHz A-horn in every scan is stored. This time is a total second (TAI) from 0:00 (UT)
on January 1st, 1993.
* Since the observation width differs from level 1A to level 1B, the start scan time is also different.

(2)

Position_in_Orbit

The position in a satellite orbit is stored. The position of a satellite consists of an orbit number and a position from theascending node. This is expressed in the following formula.

Position_in_Orbit = Orbit Number + Satellite Position
Satellite Position = (Scan_Time – Ascending Node Passage Time) / (98.9 * 60)(3)

Navigation_Data

The Cartesian orbit information on a satellite is stored in the inertial coordinate system. Orbit information is the
position and velocity of a satellite corresponding to the observation start time (Scan_Time) of each scan.

(4)

Attitude_Data

The attitude errors (Roll, Pitch, Yaw) are stored as attitude information corresponding to the observation start time
(Scan_Time) of each scan. The coordinate system is a right-hand system that is Roll for the satellite flight direction
and Yaw for the earth center direction.

(5)

6GHz-V_Observation_CountThe observed count value of 6 GHz vertical polarization is stored.

* The following value is stored for the abnormal observation data. This is applied for all frequency and polarization.

(6)

-9999

Value for Lack of data

-32768

Value for Parity error.

6GHz-H_Observation_CountThe observed count value of 6 GHz horizontal polarization is stored.

(7)10.65GHz-V_Observation_CountThe observed count value of 10.65 GHz vertical polarization is stored.

(8)10.65GHz-H_Observation_CountThe observed count value of 10.65 GHz horizontal polarization is stored.

(9)18.7GHz-V_Observation_CountThe observed count value of 18.7 GHz vertical polarization is stored.

L1A-42

(10)18.7GHz-H_Observation_CountThe observed count value of 18.7 GHz horizontal polarization is stored.

(11)

23.8GHz-V_Observation_CountThe observed count value of 23.8 GHz vertical polarization is stored.

(12)

23.8GHz-H_Observation_CountThe observed count value of 23.8 GHz horizontal polarization is stored.

(13)

36.5GHz-V_Observation_CountThe observed count value of 36.5 GHz vertical polarization is stored.

(14)

36.5GHz-H_Observation_CountThe observed count value of 36.5 GHz horizontal polarization is stored.

(15)

50.3GHz-V_Observation_Count

Since 50.3 GHz is not observed by AMSR-E, 0 fills it.

(16)

52.8GHz-V_Observation_Count

Since 52.8 GHz is not observed by AMSR-E, 0 fills it.

(17)

89.0GHz-V-A_Observation_CountThe observed count value of 89 GHz A-horn’s vertical polarization is stored.

(18)

89.0GHz-H-A_Observation_CountThe observed count value of 89 GHz A-horn’s horizontal polarization is stored.

(19)89.0GHz-V-B_Observation_CountThe observed count value of 89 GHz B-horn’s vertical polarization is stored.

(20)

89.0GHz-H-B_Observation_CountThe observed count value of 89 GHz B-horn’s horizontal polarization is stored.

L1A-43

(21)Hot-Load_Count_6_to_52

The observed count value of HTS and polarization is stored for each frequency except 89 GHz. The number ofobservation data for 1 scan is 16 points.
* Since 50 GHz and 52 GHz are not observed by AMSR-E, they are filled with 0.
* The following value is stored for the abnormal observation data. This is applied for all frequency and polarization.

0

Value for Lack of data.

-32768

Value for Parity error.

(22)

Hot-Load_Count_89

The observed count value of HTS and polarization is stored for 89 GHz. The number of observation data for 1 scan
is 32 points.

(23)

Cold_Sky_Mirror_Count_6_to_52

The observed count value of CSM and polarization is stored for each frequency except 89 GHz. The number ofobservation data for 1 scan is 16 points.

* Since 50 GHz and 52 GHz are not observed by AMSR-E, they are filled with 0.
* The following value is stored as the abnormal value in the low temperature calibration data of all frequency and polarization.

0

Value of Lack of data.

32767

Value of Parity error.

(24)

Cold_Sky_Mirror_Count_89

The observed count value of CSM and polarization is stored for 89 GHz. The number of observation data for 1 scan
is 32 points.

(25)

Antenna_Temperature_Coef(Of + Sl)

The antenna temperature conversion coefficients and polarization are stored for each frequency. The antenna
temperature coefficients contain offset-value and slope-value, and these coefficients are used for converting theobserved count value into antenna temperature.
Ta p,l = Csl p,l * Obs p,l + Cof p,l

(26)

Ta

: the antenna temperature [K]Obs: the count value of observation data

Aof

: the antenna temperature conversion coefficient (offset-value)Asl: the antenna temperature conversion coefficient (slope-value)

Rx_Offset/Gain_CountThe gain and offset value for a receiver (RX) of each frequency are stored in every scan.

L1A-44(27)Lat_of_Observation_Point_Except_89B

The latitude of the observation point on the earth surface at 89GHz A-horn is stored.

Data Range

North: 0 to 90 degrees / South: 0 to -90 degrees

Scaling Factor

0.01

Abnormal value

99.99 degrees* The observation point (latitude, longitude) on the earth surface at 89 GHz A-horn is the standard to calculate the position of
frequency except 89 GHz. The calculation method of the position of each frequency is shown in CoRegisttrationParameter.

(28)

Long_of_Observation_Point_Except_89B

The longitude of the observation point on the earth surface at 89GHz A-horn is stored.

Data Range-180 to 180 degrees

Scaling Factor

0.01

Abnormal value

222.22 degrees(29)

Lat_of_Observation_Point_for_89B

The latitude of the observation point on the earth surface at 89GHz B-horn is stored. The data range, scaling factor,
and abnormal value are the same as 89 GHz A-horn.

(30)

Long_of_Observation_Point_for_89B

The longitude to the observation point on the earth surface at 89GHz B-horn is stored. The data range, scaling factor,
and abnormal value are the same as 89 GHz A-horn.

(31)

Sun_Azimuth

The sun azimuth angle on odd observation points (origin 1) of 89 GHz A-horn is stored. (See Figure 2.3-1.)
Data Range-180 degree to 180 degrees

Scaling Factor

0.1

Abnormal Value-32768The case of observation point error.
The case of setting value is less than –180 degrees.

32767

The case of setting value is more than 180 degrees.

L1A-45(32)Sun_Elevation

The sun elevation angle on odd observation points (origin 1) of 89 GHz A-horn is stored. (See Figure 2.3-1.)
Data Range-180 degree to 180 degrees

Scaling Factor

0.1

Abnormal Value-32768The case of observation point error.
The case of setting value is below –180 degrees.

32767

The case of setting value is over 180 degrees.

Figure 2.3-1 The Definition of Sun Elevation, Azimuth

L1A-46(33)Earth_Incidence

The earth incident angle on odd observation points (origin 1) of 89 GHz A-horn is stored. (See Figure 2.3-2.) It is theangle between the perpendicular vector of the earth surface and the viewing vector of AMSR-E defined by Figure
2.3-2.

Data Range

52.4 degrees to 57.54 degrees

Scaling factor

0.02

Offset Value

55.0 degrees

Abnormal Value-128

In case of observation point error.
In case of setting value is less than –127.

127

(34)

In case of the sun elevation exceeds 180 degrees.

Earth_Azimuth

The earth azimuth angle on odd observation points (origin 1) of 89 GHz A-horn is stored. (See Figure 2.3-2.) It is theangle between the north oriented vector on the observation point and the inversed projected viewing vector definedby Figure 2.3-2.

Data Range-180.0 degrees to 180.0 degrees

Scaling Factor

0.01

Abnormal Value

99999

In case of observation point error.

Figure 2.3-2 The definition of Earth Azimuth and Incidence

L1A-47

(35)Land/Ocean_Flag_6_10_18_23_36_50_89A

The land coverage percentage of the observation footprint of AMSR-E is stored for each frequency.
* The 89 GHz land/ocean flag is stored for only odd points of A-horn (origin 1).
* Since 50 GHz and 52-GHz are not observed by AMSR-E, they are filled with 0.
* The observation point of each frequency except 89 GHz is equivalent to the position that corrected byco-registration parameters. The calculation method is shown in the item "CoRegistrationParameter".

(36)

Observation_Supplement

Observation supplement raw data such as a H/W state is stored for each scan. (See Figure 1.2-11.)(37)

SPC_Temperature_CountThe temperature of SPC (Signal Processor Control unit) in each scan is stored with the value of 10 bits and 12 bits ofraw data acquired from the satellite. (See Figure 2.3-3 and Figure 1.2-12.)
(LSB)
0

(MSB)
15

(10 bit data)― ― ― ― ― ―Not used
(LSB)
0

(MSB)
15

(12 bit data)― ― ― ―

Not used

Figure 2.3-3(38)

The Data Structure of SPC Temperature CountSPS_Temperature_CountThe temperature of SPS (Signal Processor Sensor unit) in each scan is stored with the value of 10 bits and 12 bits ofraw data acquired from the satellite. (See Figure 2.3-4 and Figure 1.2-13.)
Fix

(MSB)
15
P1 P2 E

0

0

(LSB)
0
(10 bit data)

0

Parity Flag (0 : Normal)
bit 0 ～ 6 : Odd Parity
bit 7 ～ 13 : Odd Parity(MSB)
15
P1 P2 E

(LSB)
0

Fix

(12 bit data)

0

Parity Flag (0 : Normal)
bit 0 ～ 6 : Odd Parity
bit 7 ～ 13 : Odd Parity

Figure 2.3-4

The Data Structure of SPS Temperature Count

L1A-48(39)Data_Quality

The quality information and supplementary information are stored. These correspond to observation data andcalculation result in each scan. The stored information is shown below.

1） The Sun Direction Angle from CSM. (Direction of Sun) [type: float]
The angle [degree] between the viewing vector of CSM and the direction of the sun is stored. (See Figure
2.3-5)
2） The Moon Direction Angle from CSM. (Direction of Moon) [type: float]
The angle [degree] between the viewing vector of CSM and the direction of the moon is stored. (See Figure
2.3-5)

Figure 2.3-5 The Definition of the Moon Direction Angle and the Sun Direction Angle

L1A-493） The quality of a scan. (Quality Information of a Scan)
Flag information for each bit of 32-bits is stored. This flag is set to 0 for normal case, and 1 for error case. The
setting of each bit is shown sequentially from LSB (Least Significant Bit).
a) The result of GPSR counts check.

(1 bit)When the difference of the GPSR counts in about 1 scan is outside of the range 1.5±1.0 (sec) or -6.5±1.0(sec) in engineering value, an error value (1) is set.
b) The result of HTS temperature check.

(1 bit)When the difference of the HTS temperature is more than 0.5 K in engineering value, an error value (1) is set.
c) The condition for each packet.

(16 bits)

When there are lacks of packets or the code of "DEAD", which shows the hexadecimal code for the lackpacket filled by NASA EDOS, an error value (1) is set. The quality for each 16 packets is set from the 3rd bit
LSB to MSB (Most Significant Bit).

4） Tacho Pulse Count (Tacho Pulse Count) [type: float]
The angle [degree] of averaged tacho pulse counts is stored.

5） Quality of the calibration data (Calibration Data Quality)
As quality of the calibration source, the statistics of the CSM and HTS are stored in order of, 6G-V, 6G-H,
10G-V, 10G-H, 18G-V, 18G-H, 23G-V, 23G-H, 36G-V, 36G-H, 50G-V, 52G-V, 89GA-V, 89GA-H, 89GB-V,
and 89GB-H. Detailed statistical information is shown below.
* Since 50 G-V and 52-G-V are not observed by AMSR-E, they are filled with 0.
a) The average value of CSM count.

(4 byte s) [type: float]b) The average value of HTS count.

(4 byte s) [type: float]c) The standard deviation of CSM count.

(4 byte s) [type: float]d) The standard deviation of HTS count.

(4 byte s) [type: float]6） SPC, SPS Error Flag(SPC/SPS Error Flag) [type: bit]
The check result of the error flag for SPC and SPS that affects observation data is stored. The stored value isshown below.
0: Normal case
1: SPC anomaly case
2: SPS anomaly case
3: Both SPC and SPS anomaly case

L1A-50

7） HTS temperature (HTS Temperature) [type: float]
The HTS temperature ([K]) is stored for each frequency. The stored temperature is the value used for
calculation of the coefficients for the antenna temperature conversion. The storing order of each frequency is
the same as above 5).

8） Parity Error Summary (Parity Error Summary)
The sum of the following parity error is stored for each scan.

a) The sum of parity error for RX Offset/Gain of all frequency. [type: float]b) The sum of parity error for CSM count for each frequency. [type: float](Storing order is the same as above 5).)c) The sum of parity error for HTS count for each frequency. [type: float](Storing order is the same as above 5).)9） Spare
It is filled with 0.

L1A-51

(40)Interpolation_Flag_6_to_52

The interpolation flag for CSM data is stored for each frequency except 89GHz. (Shown in Figure 2.3-6.) Each flagis corresponded to the correction items shown below.

- Correction for the contamination of the moon reflection- Correction for the stray light from the sun- Correction for the radio frequency interference on CSM data

(MSB)
7

((LSB)
0

0: None, 1: Correction for the moonlight effect has been performed.
0: None, 1: Correction for the radio frequency interference has been performed.
0: None, 1: Correction for the stray sunlight 1 has been performed.
0: None, 1: Correction for the stray sunlight 2 has been performed.
0: None, 1: Correction for the stray sunlight 3 has been performed.
0: None, 1: Correction for the stray sunlight 4 has been performed.
0: None, 1: Correction for the stray sunlight 5 has been performed.
0: No possibility of unusual voltage drop on CSM observation count.
1: Possibility of unusual voltage drop on CSM observation count.

Figure 2.3-6 The Format of The Interpolation Flag

(41)

Interpolation_Flag_89

The interpolation flag for CSM data is stored for 89GHz. (Shown in Figure 2.3-6.)(42)

Spill_Over

The observation voltage of 6 GHz before 200 scans is stored from the head scan of the product. (And the unit is mV.)
This information is used for calibrating the ground radiation on CSM.
* For Near Real Time processing, they are filled with 0.
* The abnormal values are shown in below.
-999.0In case of error on a voltage conversion etc.

0.0

In case of the lack of observation data, parity error, RxOffset/Gain error .

L1A-52§L1B

AMSR-E Level 1B
Product Format Description

L1B-i

Contents
1.

Explanation of the Product ................................................................................................................................ 1
1.1. Product Structure ....................................................................................................................................... 2
1.2. File Structure.............................................................................................................................................. 3
1.3. Data Size of one Level 1B Product .......................................................................................................... 15
2. Data Explanation ............................................................................................................................................. 16
2.1. Core Metadata .......................................................................................................................................... 16
2.2. Product Metadata ..................................................................................................................................... 17
2.3. Data Items ................................................................................................................................................ 18

L1B-ii1.

Explanation of the Product

The Level 1B product stores the value of observed microwave radiation from the earth surface and it’s geometric
information as HDF. The features of level 1B product are shown below.
•

Range of data
The level 1B product is extracted to the range of a half orbit between the South Pole and North Pole from level0 data (Science and GBAD data).

•

Observation width
The range of the observation width is ±61 degrees centered at the flight direction. (See Figure 1-1.)
196 data points are observed for each frequency below 89GHz and 392 for 89GHz.

•

Main storing data-

Scan time-

Brightness temperature of the earth surface observation data
(With radiometric conversion and correction)-

Radiometric conversion coefficients-

Temperature of the high temperature calibrator and the low temperature calibrator-

Geometric information (position, observation incidence angle, sun azimuth angle, etc.)-

Quality information-

Others (The information of the satellite, sensor, and product etc.)

Figure 1-1 The Data Range of One Scan for AMSR-E (Level 1B)

L1B-1

1.1.

Product Structure

The logical structure of level 1B product is shown in Table 1.1-1.

Table 1.1-1 Logical Structure of AMSR-E Level 1B product
Structure

HDF Data Model

Contents
The general information of the product is stored. It is

Core Meta

Global Attributebased on the indispensable item of the attribute ofNASA ECS (B. 0).

Header Part

Main characteristics of AMSR-E and the conversion
Product Meta

Global Attributetable of the engineering values, etc. are stored.
The data shown below is stored.
•

Scan Time•

Brightness Temperature of observation data

Vdata

•

Calibration Data

SDS•

Supplementary information

Data Part(Positions, Orbits, Attitudes, Coefficients,
Observation incidence angle, the sun azimuth, etc.)•

Quality information

Please refer to the level 1A format description about level 1B product items except the followings, since they are thesame as the format of the level 1A product.

-

The observation data of earth surface is stored as brightness temperature.

-

The range of the observation is ±61 degrees to the satellite flight direction.

L1B-2

1.2.

File Structure

The file structure of AMSR-E level 1B product is shown in Figure 1.2-1. The explanation for the core metadata of theheader part is shown in Table 1.2-1, and the product metadata is shown in Table 1.2-2. Moreover, the explanation foreach item of the data part shows the data size and the scale factor in Table 1.2-3, and the data structure of brightness
temperature different from level 1A in Figure 1.2-2.
[Cautions]
In Table 1.2-1, Table 1.2-2, and Table 1.2-3, un-hatched part shows the peculiar information of the level 1B product. The
explanation subsequent to Chapter 2 shows only peculiar information of the level 1B product, and the common items (thehatched) with level 1A product are explained in the level 1A product format description.

L1B-3

Level 1B ProductCore Metadata
Product Metadata（Header）（Data）In the scan
(V data)

(SDS)

Scan

(16 SDS)

Scan

Scan TimenGHz-polScan

Position in Orbit

16 pixel

Brightness Temperature

32 pixel

16 pixel

32 pixel

(SDS)

(SDS)

(SDS)

(SDS)

Scan

Hot Load Count
6 to 52

Hot Load Count89

Cold Sky Mirror Count
6 to 52

nGHz-pol (Of + Sl)

nGHz-pol (Of + Sl)

x, y, z, x', y', z'

(SDS)

(SDS)

roll, pitch, yaw
(SDS)

Scan

Scan

Antenna Temp Coef

Rx Offset/Gain Count

Navigation Datain the scanin the scanin the scan

Scan

Scan

(SDS)
Scan

(SDS)

(SDS)
Scan

Cold Sky Mirror Count
89

Attitude Datain the scan
(SDS)

Scan

(SDS)
Scan

Lat of Observation
Point Except 89B

Long of Observation
Point Except 89B

Lat of Observation
Point for 89B

Long of Observation
Point for 89B

in the scanin the scanin the scanin the scan

(SDS)

(SDS)
Scan

Scan

Sun Azimuth
6, 10, 18, 23,
36, 50, 89A

(SDS)
Scan

Sun Elevation

(SDS)
Scan

Earth Incidence

Earth Azimuth

in the scan

(SDS)

(SDS)

Scan

Scan

Land/Ocean Flagfor
6_10_18_23_36_50_89A
16 pixel

(SDS)

Scan

(SDS)

Scan

Observation
Supplement

SPC
Temperature Count32 pixelin the scan

SPS
Temperature Count

(SDS)
200

Scan

2

4

12

Interpolation Flag 6 to 52

Spill OverInterpolation Flag 89

Data Structure
Figure 1.2-1 The Data Structure

L1B-4

(SDS)
Scan

Data Quality

Table 1.2-1 Core Meta Items (1/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

ShortName
VersionID
SizeMBECSDataGranule
LocalGranuleID
ProcessingLevelID

The abbreviated name of the product
The version ID of the product
Data size of the product (Mbytes)
Product management number
ID of processing level

AMSREL1B
RELEASE336.6
P1AME020729210MD_P01B0000000
L1B

ReprocessingActual

Re-processing date (UTC)

Blank or 2002-08-10

ProductionDateTime
RangeBeginningTime
RangeBeginningDate
RangeEndingTime
RangeEndingDate
GringPointLatitude

Product creation date (UTC)Start time of observation data (UTC)Start date of observation data
End time of observation data (UTC)End date of observation data
Latitude of data effective range

GringPointLongitude

Longitude of data effective range

PGEName
PGEVersion

Data processing software name
Data processing software version

InputPointerInput file name

ProcessingCenter

Data processing center

ContactOrganizationName

Contact organization nameStartOrbitNumber
StopOrbitNumber
EquatorCrossingLongitude
EquatorCrossingDate
EquatorCrossingTime

Start orbit number
End orbit number
Longitude at the time of equatorial passage
Date of equatorial passage
Time of equatorial passage

2002-07-29T07:14:29.000Z
02:57:17.53Z
2002-07-29
03:47:06.81Z
2002-07-29
83.71,73.23,34.10,-25.31,-84.97,-73.60,-23.13,36.52
152.28,91.82,-10.34,-24.72,-39.30,-105.73,-40.70,-27.
99
L1B_Process_Software
333*33****33330333
R1540402SGS0221003170100.RBD,
R1540402SGS0221005320100.RBD
JAXA EOC
JAXA,1401,Ohashi,Hatoyama-machi,Hiki-gun,Saitama,350-0393,JAPAN,+81-49-298-1307,orderdesk@eoc.ja
xa.jp
1251
1251
-28.802002-07-29
03:24:14.41Z* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-5

Attention

Date only set for
Re-processing(0-Fill for blank)
0-Fill for blank
0-Fill for blank
0-Fill for blank
0-Fill for blank
0-Fill for blank

Fix/
ExampleFix
ExampleExampleExampleFix
ExampleExampleExampleExampleExampleExampleExampleExampleFix
ExampleExampleFix
Fix

0-Fill for blank
0-Fill for blank

ExampleExampleExampleExampleExampleTable 1.2-1 Core Meta Items (2/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

OrbitDirection
Orbit direction
DESCENDING
EphemerisGranulePointerOrbital data file name
R1540957SGS0221003170100.RBD
EphemerisType
Type of orbital data
ELMP
PlatformShortName
Abbreviated name of Platform
EOS-PM1
SensorShortName
Sensor name
AMSR-E
NumberofScans
Number of scans
1994
NumberofMissingScans
Number of missing packets
1
ECSDataModel
Meta data model name
B.0
DiscontinuityVirtualChannelC Judgement of virtual channel unit counter
DEAD Encounter
ounterdiscontinuity
QALocationPacketDiscontinui
Judgment of packet sequence counter discontinuity discontinuationty
NumberofPackets
Number of packets
31904
NumberofInputFiles
Number of input files
2
NumberofMissingPackets
Number of missing packets
1
NumberofGoodPackets
Number of good packets
31903
ReceivingCondition
Receiving condition
Blank
EphemerisQA
Ephemeris limit check
OK
AutomaticQAFlag
Limit check by software
PASS
1.MissingDataQA:Less than 20 is available->OK,
2.AntennaRotationQA:Less than 20 is available->OK,
3.HotCalibrationSourceQA:Less than 20 isavailable->OK,
4.AttitudeDataQA:Less than 20 is available->OK,
AutomaticQAFlagExplanation Explanation of limit check by software
5.EphemerisDataQA:Less than 20 is available->OK,
6.QualityofGeometricInformationQA:Less than 0 isavailable->OK,
7.BrightnessTemperatureQA:Less than 20 isavailable->OK,
All items are OK, 'PASS' is employed* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-6

Attention

Fix/
ExampleExampleExampleExampleFix
Fix
ExampleExampleFix
ExampleExampleExampleExampleExampleExampleFix
ExampleExampleFix

Table 1.2-1 Core Meta Items (3/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

The quality flag when computing the amount ofBlankphysics
ScienceQualityFlagExplanatio Explanation of the quality flag when computing theBanknamount of physics
QAPercentMisssingData
Percentage of missing data0
QAPercentOutofBoundsData Percentage of out of bound data0
QAPercentParityErrorData
Percentage of parity error data0
ProcessingQADescription
Description of the processing error
PROC_COMP
ScienceQualityFlag

ProcessingQAAttirbute

The attribute name which is abnormal by QA
Blank or NumberofMissingPackets
metadata* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-7

Attention

Fix/
ExampleFix
Fix
ExampleExampleExampleExampleAn attribute name isset up only at the
Exampletime of unusual
generating.

Table 1.2-2 Product Meta Items (1/4)
Items (Attribute Name)

Explanation

Concrete Values or Examples

SatelliteOrbit
AltitudeOrbitSemiMajorAxis
OrbitEccentricity
OrbitArgumentPerigee
OrbitInclination
OrbitPeriod
RevisitTime

The kind of Satellite’s orbit
The altitude of Satellite
The orbit semi-major axis
The orbital eccentricity
The orbital argument perigee
The orbital inclination
The orbital period
Orbit recurrent days

AMSRChannel

The kind of AMSR channels

AMSRBandWidthBand width of AMSRAMSRbeamWidth

Beam width of AMSR

OffNadirOff-nadir angle

SpatialResolution(AzXEl)

Spatial resolution

ScanningPeriod
SwathWidth
DynamicRange
DataFormatType
HDFFormatVersion
EllipsoidName
SemiMajorAxisofEarth
FlatteningRatioofEarth
SensorAlignment

Scanning period
Swath width
Dynamic range
Data format typeHDF format version
Earth ellipse model
Earth equatorial radius
Flattening ratio of earth
Sensor alignment
The effective range of a thermistor engineering value
60,585,770,872,924,952,961,1023
conversion factor

ThermistorCountRangeWx

Sun-synchronous_sub-recurrent
707.9km
7085.858km
0.00095
106.480deg
98.15deg
98minutes
16days
6.925GHz,10.65GHz,18.7GHz,23.8GHz,36.5GHz,89.0GHz-A,89.0GHzB
6G-350MHz,10G-100MHz,18G-200MHz,23G-400MHz,36G-1000MHz,
50.3G-0,52G-0,89GA-3000MHz,89GB-3000MHz
6G-1.8deg,10G-1.2deg,18G-0.64deg,23G-0.75deg,36G-0.35deg,
50.3G-0,52G-0,89GA-0.15deg,89GB-0.15deg
47.0deg: 89GB, 47.5deg: others
6G-43.2kmX75.4km,10G-29.4kmX51.4km,18G-15.7kmX27.4km,23G-18.
1kmX31.5km,
36G-8.2kmX14.4km,50.3G- ,52G- ,89GA-3.7kmX6.5km,89GB-3.5kmX5.
9km
1.5sec1450km
2.7K-340K
NCSA-HDF
Ver4.2r4
WGS84
6378.1km
0.00335
Rx=0.00000,Ry=0.00000,Rz=0.00000* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-8

Fix/
Example
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix

Table 1.2-2 Product Meta Items (2/4)
Items (Attribute Name)
ThermistorConversionTable
Wa
ThermistorConversionTable
Wb
ThermistorConversionTable
Wc
ThermistorConversionTable
Wd
Platinum#1CountRangeWx
Platinum#1ConversionTable
Wa
Platinum#1ConversionTable
Wb
Platinum#1ConversionTable
Wc
Platinum#1ConversionTable
Wd
Platinum#2CountRangeWx
Platinum#2ConversionTable
Wa
Platinum#2ConversionTable
Wb
Platinum#2ConversionTable
Wc
Platinum#2ConversionTable
Wd

Explanation
Thermistor conversion table: Wa
Thermistor conversion table: Wb
Thermistor conversion table: Wc
Thermistor conversion table: Wd

Concrete Values or Examples
0.000000,0.000015,0.000161,0.000618,0.002331,0.011459,0.010101,0.00
0000
0.000000,0.056460,-0.109878,-0.819170,-3.801865,-20.783040,-18.2121
20,0.000000-35.000000,-38.250000,9.220000,284.170000,1582.770000,9480.000000,
8263.350000,90.000000

Fix/
Example
Fix
Fix
Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

Platinum#1 count range: Wx1168,1296,1536,1752,4095

FixPlatinum#1 conversion table: Wa

0.0,0.0,0.0,0.0,0.0

Fix

Platinum#1 conversion table: Wb

0.000000,0.039000,0.042000,0.039000,0.042000

Fix

Platinum#1 conversion table: Wc-35.000000,-80.625000,-84.000000,-80.000000,-84.667000

Fix

Platinum#1 conversion table: Wd

0.0,0.0,0.0,0.0,0.0

Fix

Platinum#2 count range: Wx

272,1536,1792,2032,2288,3248,3712,4095

FixPlatinum#2 conversion table: Wa

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

Platinum#2 conversion table: Wb
Platinum#2 conversion table: Wc
Platinum#2 conversion table: Wd

0.000000,0.078300,0.078000,0.083000,0.078000,0.083000,0.085300,0.00
0000-140.000000,-161.440000,-160.000000,-169.333000,-158.750000,-170.66
7000,-177.640000,140.000000
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-9

Fix
Fix
Fix

Table 1.2-2 Product Meta Items (3/4)
Items (Attribute Name)

Explanation

Concrete Values or Examples

Platinum#3CountRangeWx
Platinum#3ConversionTable
Wa
Platinum#3ConversionTable
Wb
Platinum#3ConversionTable
Wc
Platinum#3ConversionTable
Wd

Platinum#3 count range: Wx

349,1454,2000,2555,3059,3566,4020,4095

Platinum#3 conversion table: Wa

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

CoefficientAvv

Coefficient: Avv

CoefiicientAhv

Coefficient: Ahv

CoefficientAov

Coefficient: Aov

CoefficientAhh

Coefficient: Ahh

CoefficientAvh

Coefficient: Avh

CoefficientAoh

Coefficient: Aoh

CSMTemperature

Brightness temperature of deep space

CoRegistrationParametererA1
CoRegistrationParametererA2

Platinum#3 conversion table: Wb
Platinum#3 conversion table: Wc
Platinum#3 conversion table: Wd

Co-registration parameter: A1
Co-registration parameter: A2

0.000000,0.009100,0.009100,0.009100,0.009900,0.009900,0.008500,0.00
0000
0.000000,6.845000,6.803800,6.803800,4.719500,4.719500,9.835000,44.0
00000
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix/
Example
Fix
Fix
Fix
Fix
Fix

6G-1.037,10G-1.032,18G-1.025,23G-1.032,36G-1.029,50G-0.000,52G-0.
Fix
000,89GA-1.025,89GB-1.029
6G--0.003,10G--0.003,18G--0.003,23G--0.004,36G--0.004,50G-0.000,52
Fix
G-0.000,89GA--0.003,89GB--0.004
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52
Fix
G-0.000,89GA--0.022,89GB--0.024
6G-1.037,10G-1.031,18G-1.025,23G-1.034,36G-1.029,50G-0.000,52G-0.
Fix
000,89GA-1.028,89GB-1.031
6G--0.003,10G--0.002,18G--0.003,23G--0.006,36G--0.004,50G-0.000,52
Fix
G-0.000,89GA--0.006,89GB--0.006
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52
Fix
G-0.000,89GA--0.022,89GB--0.024
6GV-2.800, 6GH-2.800, 10GV-2.800, 10GH-2.800, 18GV-2.800,
18GH-2.800, 23GV-2.800, 23GH-2.800, 36GV-2.800, 36GH-2.800,
Fix
50GV-0.000, 52GV-0.000, 89GAV-2.800, 89GAH-2.800, 89GBV-2.800,
89GBH-2.800
6G-0.10450, 10G--0.34960, 18G--0.32010, 23G--0.25950, 36G--0.31510,
Example50G-0.00000
6G--1.04960, 10G--0.64760, 18G--0.20170, 23G--0.26610, 36G--0.21810,
Example50G-0.00000* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-10Table 1.2-2 Product Meta Items (4/4)
Items (Attribute Name)
CalibrationCurve
Coefficient#1

CalibrationCurve
Coefficient#2

CalibrationCurve
Coefficient#3

CalibrationCurve
Coefficient#4

CalibrationCurve
Coefficient#5
CalibrationMethod

Explanation

Concrete Values or Examples

6GV--0.2099101, 6GH--0.2054645, 10GV--0.0580782, 10GH--0.0103279,
The radiometric correction coefficient for the 18GV--0.0853578, 18GH--0.0435186, 23GV--0.1288643, 23GH--0.1288643,
0th order
36GV--0.0475611, 36GH--0.0536047, 50GV-0.0000000, 52GV-0.0000000,
89GAV--0.0278573, 89GAH--0.0447590, 89GBV--0.0273764, 89GBH--0.0316265
6GV-1.0756783,
6GH-1.0740756,
10GV-1.0209393,
10GH-1.0037236,
The radiometric correction coefficient for the 18GV-1.0307711,
18GH-1.0156885,
23GV-1.0464586,
23GH-1.0464586,
1st order
36GV-1.0171470,
36GH-1.0193259,
50GV-0.0000000,
52GV-0.0000000,
89GAV-1.0100426, 89GAH-1.0161356, 89GBV-1.0098693, 89GBH-1.0114014
6GV--0.0002537, 6GH--0.0002483, 10GV--0.0000704, 10GH--0.0000125,
The radiometric correction coefficient for the 18GV--0.0001022, 18GH--0.0000522, 23GV--0.0001556, 23GH--0.0001556,
2nd order
36GV--0.0000575, 36GH--0.0000648, 50GV-0.0000000, 52GV-0.0000000,
89GAV--0.0000334, 89GAH--0.0000537, 89GBV--0.0000329, 89GBH--0.0000379
6GV-0.0000000, 6GH-0.0000000, 10GV-0.0000000, 10GH-0.0000000,
The radiometric correction coefficient for the 18GV-0.0000000, 18GH-0.0000000, 23GV-0.0000000, 23GH-0.0000000,
3rd order
36GV-0.0000000, 36GH-0.0000000, 50GV-0.0000000, 52GV-0.0000000,
89GV-0.0000000, 89GH-0.0000000
6GV-0.0000000, 6GH-0.0000000, 10GV-0.0000000, 10GH-0.0000000,
The radiometric correction coefficient for the 18GV-0.0000000, 18GH-0.0000000, 23GV-0.0000000, 23GH-0.0000000,
4th order
36GV-0.0000000, 36GH-0.0000000, 50GV-0.0000000, 52GV-0.0000000,
89GV-0.0000000, 89GH-0.0000000
RxTemperatureReferenced,SpillOver,CSMInterpolation,
Absolute89GPositioning,NonlinearityCorrection
Calibration method name
* RxTemperatureReferenced may be changed into HTUCoefficients or
ElectromagneticAnalysis
ver0002
Parameter version of the HTS correction.

HTSCorrectionParameter
VersionSpillOverParameterVersion Parameter version of the CSM spill over ver0001
correction
CSMInterpolationParameter Parameter version of the CSM interpolation ver0001
Versioncorrection
Absolute89Gpositioning
Parameter version of the correction for ver0002
ParameterVersion
absolute positions of 89 GHz

Fix/
ExampleExampleExampleExampleExampleExampleExampleExampleExampleExampleExample* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-11

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Items
Scan_Time
Position_in_Orbit
Navigation_Data
Attitude_Data
6GHz-V_Birghtness_Temperature
6GHz-H_Birghtness_Temperature
10.65GHz-V_Birghtness_Temperature
10.65GHz-H_Birghtness_Temperature
18.7GHz-V_Birghtness_Temperature
18.7GHz-H_Birghtness_Temperature
23.8GHz-V_Birghtness_Temperature
23.8GHz-H_Birghtness_Temperature
36.5GHz-V_Birghtness_Temperature
36.5GHz-H_Birghtness_Temperature
50.3GHz-V_Birghtness_Temperature
52.8GHz-V_Birghtness_Temperature
89.0GHz-A-V_Birghtness_Temperature
89.0GHz-A-H_Birghtness_Temperature
89.0GHz-B-V_Birghtness_Temperature
89.0GHz-B-H_Birghtness_Temperature

Table 1.2-3 Data Items, Sizes and Scaling Factors (1/2)
Byte
Type
Scaling factor
No. of samples per scan
8
double1.0
18
double
1.0
1
6*4
float
1.0
6
3*4
float
1.0
3
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
2
signed int
0.1
196
#1
2
signed int
0.1
196
#1
2
signed int
0.1
196
2
signed int
0.1
392
2
signed int
0.1
392
2
signed int
0.1
392
2
signed int
0.1
392#1: 50GHz and 52GHz are filled with 0 for AMSR-E* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-12

Units
sec
m,m/s
deg
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K

Dimension
nscan
nscan
nscan
nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
196*nscan
392*nscan
392*nscan
392*nscan
392*nscan

No.
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

Table 1.2-3 Data Items, Sizes and Scaling Factors (2/2)
Items
Byte
Type
Scale factor
No. of samples per scan
Hot_Load_Count_6_to_52
2
signed int
1.0
16
Hot_Load_Count_89
2signed int
1.0
32
Cold_Sky_Mirror_Count_6_to_52
2
signed int
1.0
16
Cold_Sky_Mirror_Count_89
2signed int
1.0
32
Antenna_Temp_Coef(Of+Sl )
4
float
1.0
32
Rx_Offset/Gain_Count2
unsigned int
1.0
32
Lat_of_Observation_Point_Except_89B2
signed int
0.01
486
Long_of_Observation_Point_Except_89B2
signed int
0.01
486
Lat_of_Observation_Point_for_89B2
signed int
0.01
486
Long_of_Observation_Point_for_89B2
signed int
0.01
486
Sun_Azimuth
2
signed int
0.1
243
Sun_Elevation2
signed int
0.1
243
Earth_Incidence#2
1
signed char
0.02
243
Earth_Azimuth
2
signed int
0.01
243Land/Ocean_Flag_for_ 6_10_18_23_36_50_89A
1
unsigned int
1.0
243
Observation_Supplement
2
1.0
27
SPC_Temperature_Count2
unsigned int
1.0
20
SPS_Temperature_Count2
unsigned int
1.0
32
Data_Quality
4
float
1.0
128
Interpolation_Flag6_to_52
1
char
1.0
16
Interpolation_Flag_89
1
char
1.0
32
Spill_Over
4
float
1.0
243

#2: The Earth Incidence has also sub-attribute “OFFSET”. This offset is set to 55.0.
* The un-hatched indicates the peculiar information of the level 1B product. (Refer to the level 1A product description for the hatched.)

L1B-13

Units
Count
Count
Count
Count
K+K/Cnt
Count
deg
deg
deg
deg
deg
deg
deg
deg
%
Count
Count
mV

Dimension
16*nscan*12
32*nscan*4
16*nscan*12
32*nscan*4
32*nscan
32*nscan
486*nscan
486*nscan
486*nscan
486*nscan
243*nscan
243*nscan
243*nscan
243*nscan
243*nscan*7
27*nscan
20*nscan
32*nscan
128*nscan
16*nscan*12
32*nscan*4
243*200scan*2

Pixel(0,0)

The 196th observation point

The second observation point

Scan(195,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)

6GHz-V Brightness Temperature(195,n-1)(6-H, 10-V/H, 18-V/H, 23-V/H, 36-V/H, 50-V, 52-V are the same structure)(Note: 50-V, 52-V SDSs are filled with 0)

Pixel
(0,0)

The 392nd observation point

The second observation point

Scan(391,0)

2 byte

The first observation point

Scan No. 1

Scan No. n(Nominal: 1996~2000)(0,n-1)89GHzA-V Brightness Temperature(391,n-1)(89A-H, 89B-V/H are the same structure)

Figure 1.2-2 Structure of Brightness Temperature

L1B-14

1.3.

Data Size of one Level 1B ProductThe data size of one AMSR-E level 1B product file is shown in Table 1.3-1 in case of 2000 scans. However, theactual file size is 8% smaller because HDF is a compressed format.
Table 1.3-1 Estimation of the Data Volume

AMSR-E Product Data Size
Item
Scan Time
Position in Orbit
6GHz-V Brightness Temperature
6GHz-H Brightness Temperature
10.65GHz-V Brightness Temperature
10.65GHz-H Brightness Temperature
18.7GHz-V Brightness Temperature
18.7GHz-H Brightness Temperature
23.8GHz-V Brightness Temperature
23.8GHz-H Brightness Temperature
36.5GHz-V Brightness Temperature
36.5GHz-H Brightness Temperature
50.3GHz-V Brightness Temperature
52.8GHz-H Brightness Temperature
89.9GHz-V-A Brightness Temperature
89.9GHz-H-A Brightness Temperature
89.9GHz-V-B Brightness Temperature
89.9GHz-H-B Brightness Temperature
Hot Load Count 6 to 52
Hot Load Count 89
Cold Sky Mirror Count 6 to 52
Cold Sky Mirror Count 89
Antenna Temp Coef (Of + Sl)
Rx Offset/Gain Count
Navigation Data
Attitude Data
Lat of Observation Point Except 89B
Long of Observation Point Except 89B
Lat of Observation Point for 89B
Long of Observation Point for 89B
Sun Azimuth
Sun Elevation
Earth Incidence
Earth Azimuth
Land/Ocean Flag
Observation Support
SPC Temperature CountSPS Temperature Count
Data Quality
Interpolation Flag 6 to 52
Interpolation Flag 89
Spill Over
Total
Volume/Granule ( MB )Volume/Day ( GB )Volume/Month ( GB )No. ofSamplesNo. of
Bytes

1
1
196
196
196
196
196
196
196
196
196
196
196
196
392
392
392
392
16
32
16
32
32
32
6
3
392
392
392
392
196
196
196
196
196
27
22
32
512
16
32
243

L1B-15

Semi Total
8
8
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
4
2
4
4
2
2
2
2
2
2
1
2
1
2
2
2
4
1
1
4

Remark

8
8
392
392
392
392
392
392
392
392
392
392
392
392
784
784
784
784
384 (2*16) * 12 freq
256 (2*32) * 4 freq
384 (2*16) * 12 freq
256 (2*32) * 4 freq
128
64
24
12
784
784
784
784
392 A scan only
392 A scan only
196 A scan only
392 A scan only
1372 1*7 for 6,10,23,37,50,89A
54
44
64
2048
192 (1*16) * 12 freq
128 (1*32) * 4 freq
1944 * 2 freq * 200 Scans
19718
34.3 2000 Scans/Scene
1.0 29 Files/Day
30.1 30 Days/Month2.

Data Explanation

This chapter shows explanation of each data item of AMSR-E level 1B product excluding common items for level 1A
product.

2.1.

Core Metadata(1)

ShortName

The abbreviated name of a product is stored. Please refer to the level 1A product description for the details.

(2)

LocalGranuleID

The Granule ID based on JAXA EOC ID convention is stored. The Granule ID for level 1B is as follows.
P1AMEYYMMDDPPPMX_KNLL0000000[Scene ID]
P1
P1 (Fixed: EOS-PM1 Aqua)
AME
AME (Fixed: AMSR-E)
YYMMDD
Date of data acquisition start (UT)PPP
Path number at the observation start point (001 – 233)
M
M or R (M: regular process / re-process, R: near real time process)X
A or D (Orbit direction, A: Ascending, D: Descending)[Product ID]
K
P or L (P: regular process / re-process, L: near real time process)N
0 (Fixed: Spare)LL
1B (Fixed: for level 1B)
0000000
0 (Fixed: Spare)(3)

ProcessingLevelID

The processing level is stored. Please refer to the level 1A product description for the details.

(4)

PGENameThe data processing software name is stored. Please refer to the level 1A product description for the details.

L1B-16

2.2.
(1)

Product Metadata
CoRegistrationParameterA1, CoRegistrationParameterA2

The co-registration parameters A1 and A2 are stored for each frequency. The relation of the number of observation
points between level 1B and level 1A is shown the following table. Extraction of the observation width is performed
with the same center position in a scan. As a result, the scanning start position is changed from the odd-numbered
point in level 1A to the even-numbered point in level 1B, and then the coefficient of A1 changes with processing
levels.
Number ofobservation
pointsStart Position

Except 89GHz

243

1

122

89GHz

486

1

244

Except 89GHz

196

1(24*)

99(122*)*: Position of level 1A

89GHz

392

1(48*)

197(244*)*: Position of level 1AProcessing Level

Note
Position

L1A

L1B

CenterPlease refer to the level 1A product description for the calculation method of position using co-registration
parameters A1 and A2.

L1B-17

2.3.
(1)

Data Items
6GHz-V_Brightness_Temperature

The observed brightness temperature of 6 GHz vertical polarization is stored.

* The following value is stored for the abnormal observation data. This is applied for all frequencies andpolarizations.
Scaling Factor

0.1 (All Frequencies)

Abnormal Values-9999

Value for Lack of data

-32768

Value for Parity error

The other minus value

Value for Limit Check error(2)6GHz-H_Brightness_Temperature

The observed brightness temperature of 6 GHz horizontal polarization is stored.

(3)

10.65GHz-V_Brightness_Temperature

The observed brightness temperature of 10.65 GHz vertical polarization is stored.

(4)

10.65GHz-H_Brightness_Temperature

The observed brightness temperature of 10.65 GHz horizontal polarization is stored.

(5)

18.7GHz-V_Brightness_Temperature

The observed brightness temperature of 18.7 GHz vertical polarization is stored.

(6)

18.7GHz-H_Brightness_Temperature

The observed brightness temperature of 18.7 GHz horizontal polarization is stored.

(7)

23.8GHz-V_Brightness_Temperature

The observed brightness temperature of 23.8 GHz vertical polarization is stored.

(8)

23.8GHz-H_Brightness_Temperature

The observed brightness temperature of 23.8 GHz horizontal polarization is stored.

(9)36.5GHz-V_Brightness_Temperature

The observed brightness temperature of 36.5 GHz vertical polarization is stored.

(10)

36.5GHz-H_Brightness_Temperature

The observed brightness temperature of 36.5 GHz horizontal polarization is stored.

L1B-18(11)50.3GHz-V_Brightness_Temperature

Since 50.3 GHz is not observed by AMSR-E, 0 fills it.

(12)

52.8GHz-V_Brightness_Temperature

Since 52.8 GHz is not observed by AMSR-E, 0 fills it.

(13)

89.0GHz-V-A_Brightness_Temperature

The observed brightness temperature of 89 GHz A-horn’s vertical polarization is stored.

(14)89.0GHz-H-A_Brightness_Temperature

The observed brightness temperature of 89 GHz A-horn’s horizontal polarization is stored.

(15)

89.0GHz-V-B_Brightness_Temperature

The observed brightness temperature of 89 GHz B-horn’s vertical polarization is stored.

(16)89.0GHz-H-B_Brightness_Temperature

The observed brightness temperature of 89 GHz B-horn’s horizontal polarization is stored.

L1B-19§L1M

AMSR-E Level 1B Map
Product Format Description

Contents
1.

2.

EXPLANATION OF THE PRODUCT ............................................................................................................. 1
1.1.
1.2.
1.3.

PRODUCT STRUCTURE ................................................................................................................. 3
FILE STRUCTURE ......................................................................................................................... 4
MAPPING METHOD ..................................................................................................................... 18

1.4.

RE-SAMPLING METHOD ............................................................................................................. 19

1.5.
1.6.

DATA VOLUME SIZE OF A PRODUCT ............................................................................................ 20
THE OTHERS .............................................................................................................................. 21

1.3.1.
1.3.2.
1.3.3.

Equirectangular projection .............................................................................................. 18
Mercator projection .......................................................................................................... 18
Polar Stereo ...................................................................................................................... 18

1.4.1.

The Nearest Neighbor Method ........................................................................................ 19

1.6.1.
1.6.2.
1.6.3.

The data range of the product ......................................................................................... 21
Coordinate System ........................................................................................................... 23
Scaling Factor ................................................................................................................... 23

DATA EXPLANATION ..................................................................................................................................24
2.1.
2.2.
2.3.

CORE METADATA........................................................................................................................ 24
PRODUCT METADATA ................................................................................................................. 26
EXPLANATION OF EACH DATA ................................................................................................... 27

L1M-i

1.

Explanation of the Product

The Level 1B Map product stores the corrected brightness temperature that projected on the map as HDF. The
features of the product are shown below.
•

Range of the map projection image
The map projected image expresses the brightness temperature extracted from the specified center position by
the region of about 3000 km x 3000 km, and the center position of the image has relations in Table 1-1. And
the observation width in the image is about 1450 km that corresponds the level 1B observation width (SeeFigure. 1-1).

•

The method of map projection
The map projection methods are shown below. In each projection method, the range of the center latitude thatcan be specified is limited (Table 1-2). And the image size is the same in all projection methods.

•-

Equirectangular projection-

Mercator projection-

Polar Stereo projection

Main storing data-

The brightness temperature of the earth observation data (with radiometric correction)-

The geometric information (position, observation incident angle, sun azimuth angle, etc.)-

The quality information-

The others (The information of the satellite, sensor, and product etc.)

L1M-1

Table 1-1 Map projected image size and the interval of a pixel
Frequency

Image size(Pixel)

Flight Direction(km/pixel)

Azimuth Direction(km/pixel)

Except 89GHz

300×300

10

10

89GHz

600×600

5

5* The 89GHz image is completed by each observation data of A-horn and B-horn along the flight direction.

Table 1-2 Relations between the map projection method and the center latitude
Map projection

Range of the center

Number of input

methodlatitude (degrees)level 1B

-60 < Phi < 60

1NoteEquirectangular
Mercator

1 or 260 ≤ Phi

degrees or less and 60 degrees or
more, it needs 2 products.

3000 km3000 km

Polar Stereo

When the center latitude is -65-60 ≥ Phi

1450 kmFigure 1-1 the range of the map-projected image（Example： The map projected image by Mercator projection.）

L1M-2

1.1.

Product Structure

The logical structure of level 1B Map product is shown in Table 1.1-1.
Table 1.1-1 Logical Structure of AMSR-E Level 1B Map product
Structure

HDF Data Model

Contents
The general information of the product is stored. It is basedCore Meta

Global Attributeon the indispensable item of the attribute of NASA ECS (B.
0). (It is same as level 1B product.)

Header Part
Main characteristics of AMSR-E and the conversion table ofProduct Meta

Global Attributethe engineering values, etc. are stored.
(It is same as level 1B product.)
The data shown below is stored.

Vdata

•

Map-projected brightness temperature (all frequencies)•

Geometric information (The position of four corners,

Data PartSDS

the observation incident angle, the sun azimuth angle,
and the land/ocean flags)•

Quality information

L1M-3

1.2.

File Structure

The file structure of AMSR-E level 1B Map product is shown in Figure 1.2-1. The explanation for the core metadataof header part is shown in Table 1.2-1, and the product metadata is shown in Table 1.2-2. Moreover, the explanationfor each item of data part shows the data size and the scale factor in Table 1.2-3, and the data structure in Figure
1.2-2 - 1.2-16.
[Cautions]
In Table 1.2-1, Table 1.2-2, and Table 1.2-3, un-hatched shows the peculiar information of the level 1B Map product. The
explanation subsequent to Chapter 2 shows only peculiar information of the level 1B Map product, and the common items (thehatched) with level 1A product are explained in the level 1A product format description.

Level 1B Map ProductCore Metadata(Header)

Product Metadata
Pixel(Data)(SDS)
Line* 16 frequencies

Brightness Temperature

Pixel

Pixel
(SDS)
Line

Pixel
(SDS)

Line

Sun Azimuth
6, 10, 18, 23,

Pixel
(SDS)

Line

Sun Elevation

(SDS)
Line

Earth Incidence

Earth Azimuth

Pixel
Pixel

36, 50 89A

Line

Line

Land/Ocean Flag for
0_18_23_36_50_89A

Pixel
(SDS)

(SDS)

(SDS)

Line

Observation
Supplement

SPC
Temperature Count

Data Structure
Figure 1.2-1 The Data Structure

L1M-4

Table 1.2-1 Core Meta Items (1/3)
Items (Attribute Name)

Explanation

Concrete Values or Examples

VersionID
SizeMBECSDataGranule
LocalGranuleID
ProcessingLevelID

The abbreviated name of the
AMSREL1M
product
The version ID of the product
RELEASE3
Data size of the product (Mbytes)
36.6
Product management number
P1AME020729210MD_O01MMN00NWTN50
ID of processing level
L1M

ReprocessingActual

Re-processing date (UTC)

ProductionDateTime

Product creation date (UTC)
2002-07-29T07:14:29.000Z
Start time of observation data
02:57:17.53Z(UTC)
Start date of observation data
2002-07-29
End time of observation data (UTC) 03:47:06.81Z
End date of observation data
2002-07-29
Latitude at the upper left of a image +61.66
Longitude at the upper left of a-36.01
image
Latitude at the lower left of a image +34.09
Longitude at the lower left of a-36.01
image
Latitude at the lower right of a+34.09image
Longitude at the lower right of a
+5.84
image
Latitude at the upper right of a+61.66
image
Longitude at the upper right of a
+5.84
image

ShortName

RangeBeginningTime
RangeBeginningDate
RangeEndingTime
RangeEndingDate
GringPointLatitude1
GringPointLongitude1
GringPointLatitude2
GringPointLongitude2
GringPointLatitude3
GringPointLongitude3
GringPointLatitude4
GringPointLongitude4

blank or 2002-08-10* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-5

Attention

Fix/
ExampleFix
ExampleExampleExampleFix

Date only set for
Re-processing(0-Fill for blank)
0-Fill for blank

ExampleExample0-Fill for blank

Example0-Fill for blank
0-Fill for blank
0-Fill for blank

ExampleExampleExampleExampleExampleExampleExampleExampleExampleExampleExampleTable 1.2-1 Core Meta Items (2/3)
Items (Attribute Name)

Explanation

PGEName
PGEVersion

Data processing software name
Data processing software version

InputPointerInput file name

ProcessingCenter

Data processing center

ContactOrganization
Name

Contact organization nameStartOrbitNumber
StopOrbitNumber
EquatorCrossing
Longitude
EquatorCrossingDate
EquatorCrossingTime
OrbitDirection
EphemerisGranule
Pointer
EphemerisType
PlatformShortName
SensorShortName
NumberofScans
NumberofMissingScans
ECSDataModel
DiscontinuityVirtual
ChannelCounter
QALocationPacket
Discontinuity

Concrete Values or Examples
L1BMAP-Process-Software
333*33****33330333
R1540402SGS0221003170100.RBD,
R1540402SGS0221005320100.RBD
JAXA EOC
JAXA,1401 Ohhashi Hatoyama-Machi,Hiki-gun,
Saitama,350-0393,Japan,+81-49-298-1307,
orderdesk@eoc.jaxa.jp
1251
1251

Start orbit number
End orbit number
Longitude at the time of equatorial-28.80passage
Date of equatorial passage
2002-07-29
Time of equatorial passage
03:24:14.41Z
Orbit direction
DESCENDING
Orbital data file name

Attention

ExampleFix
Fix
ExampleExampleExample0-Fill for blank
0-Fill for blank

R1540957SGS0221003170100.RBD

Type of orbital data
ELMP
Abbreviated name of Platform
EOS-PM1
Sensor name
AMSR-E
Number of scans
1994
Number of missing packets
1
Meta data model name
B.0
Judgement of virtual channel unit
DEAD Encountercounter discontinuity
Judgment ofpacket sequence
discontinuation
counter discontinuity

Fix/
ExampleFix
ExampleExampleExampleExampleExampleExampleFix
Fix
ExampleExampleFix
ExampleExample* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-6

Table 1.2-1 Core Meta Items (3/3)
Items (Attribute Name)
NumberofPackets
NumberofInputFiles
NumberMissingPackets
NumberofGoodPackets
ReceivingCondition
EphemerisQA
AutomaticQAFlag
AutomaticQAFlag
Explanation
ScienceQualityFlag

Explanation

Concrete Values or Examples

Number of packets
Number of input files
Number of missing packets
Number of good packets
Receiving condition
Ephemeris limit check
Limit check by software

31904
2
1
31903
blank
OK
PASS
1.ProcessedAnomalyQA:Less than 20 is available->OK,
Explanation of limit check by
2.InputAnomalyQA:Less than 20 is available->OK,
software
All items are OK, 'PASS' is employed
The quality flag when computing
blankthe amount of physics
Explanation of the quality flag whenblank
computing the amount of physics
Percentage of missing data0

ScienceQualityFlag
Explanation
QAPercentMisssingData
QAPercentOut
Percentage of out of bound data
ofBoundsData
QAPercentParityErrorData Percentage of parity error data
ProcessingQADescription Description of the processing error
ProcessingQAAttirbute

Attention

The attribute name which
abnormal by QA metadata

Fix
Fix
ExampleExample00
PROC_COMP
isbrank or NumberofMissingPackets* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-7

Fix/
ExampleExampleExampleExampleExampleFix
ExampleExampleFix

An attribute name isset up only at thetime of unusual
generating.

ExampleExampleExampleTable 1.2-2 Product Meta Items (1/4)
Items (Attribute Name)

Explanation

SatelliteOrbit
AltitudeOrbitSemiMajorAxis
OrbitEccentricity
OrbitArgumentPerigee
OrbitInclination
OrbitPeriod
RevisitTime
AMSRChannel

The kind of Satellite’s orbit
The altitude of Satellite
The orbit semi-major axis
The orbital eccentricity
The orbital argument perigee
The orbital inclination
The orbital period
Orbit recurrent days
The kind of AMSR channels

AMSRBandWidthBand width of AMSRAMSRbeamWidth

Beam width of AMSR

Concrete Values or Examples
Sun-synchronous_sub-recurrent
707.9km
7085.858km
0.00095
106.480deg
98.15deg
98minutes
16days
6.925GHz,10.65GHz,18.7GHz,23.8GHz,36.5GHz,89.0GHz-A,89.0GHz-B
6G-350MHz,10G-100MHz,18G-200MHz,23G-400MHz,36G-1000MHz,
50.3G-0,52G-0,89GA-3000MHz,89GB-3000MHz
6G-1.8deg,10G-1.2deg,18G-0.64deg,23G-0.75deg,36G-0.35deg,50.3G-0,52G-0,89GA-0.15deg,89GB-0.15deg
47.0deg: 89GB, 47.5deg: others
6G-43.2kmX75.4km,10G-29.4kmX51.4km,18G-15.7kmX27.4km,23G-18.1kmX31.5km,
36G-8.2kmX14.4km,50.3G- ,52G- ,89GA-3.7kmX6.5km,89GB-3.5kmX5.9km
1.5sec1450km
2.7K-340K
NCSA-HDF
Ver4.2r4
WGS84
6378.1km
0.00335
Rx=0.00000,Ry=0.00000,Rz=0.00000

OffNadirOff-nadir angle
SpatialResolution(AzX
Spatial resolution
El)
ScanningPeriod
Scanning period
SwathWidth
Swath width
DynamicRange
Dynamic range
DataFormatType
Data format type
HDFFormatVersion
HDF format version
EllipsoidName
Earth ellipse model
SemiMajorAxisofEarth Earth equatorial radius
FlatteningRatioofEarth Flattening ratio of earth
SensorAlignment
Sensor alignment
ThermistorCountRang The effective range of a thermistor
60,585,770,872,924,952,961,1023
eWx
engineering value conversion factor* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-8

Fix/
Example
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix

Table 1.2-2 Product Meta Items (2/4)
Items (Attribute Name)

Explanation

ThermistorConversionTa
ble
Thermistor conversion table: Wa
Wa
ThermistorConversionTa Thermistor conversion table: Wb
ble
Wb
ThermistorConversionTa Thermistor conversion table: Wc
ble
Wc
ThermistorConversionTa Thermistor conversion table: Wd
ble
Wd
Platinum#1CountRang
Platinum#1 count range: Wx
eWx
Platinum#1Conversion
Platinum#1 conversion table: Wa
TableWa
Platinum#1Conversion
Platinum#1 conversion table: Wb
TableWb
Platinum#1Conversion
Platinum#1 conversion table: Wc
TableWc
Platinum#1Conversion
Platinum#1 conversion table: Wd
TableWd
Platinum#2CountRang
Platinum#2 count range: Wx
eWx
Platinum#2Conversion
Platinum#2 conversion table: Wa
TableWa
Platinum#2Conversion
Platinum#2 conversion table: Wb
TableWb
Platinum#2Conversion
Platinum#2 conversion table: Wc
TableWc
Platinum#2Conversion
Platinum#2 conversion table: Wd
TableWd

Concrete Values or Examples

Fix/
Example0.000000,0.000015,0.000161,0.000618,0.002331,0.011459,0.010101,0.000000

Fix

0.000000,0.056460,-0.109878,-0.819170,-3.801865,-20.783040,-18.212120,0.000000

Fix-35.000000,-38.250000,9.220000,284.170000,1582.770000,9480.000000,8263.350000,90.000000

Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix1168,1296,1536,1752,4095

Fix

0.0,0.0,0.0,0.0,0.0

Fix

0.000000,0.039000,0.042000,0.039000,0.042000

Fix-35.000000,-80.625000,-84.000000,-80.000000,-84.667000

Fix

0.0,0.0,0.0,0.0,0.0

Fix

272,1536,1792,2032,2288,3248,3712,4095

Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

0.000000,0.078300,0.078000,0.083000,0.078000,0.083000,0.085300,0.000000

Fix-140.000000,-161.440000,-160.000000,-169.333000,-158.750000,-170.667000,-177.640000,14
0.000000Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-9

Table 1.2-2 Product Meta Items (3/4)
Items (Attribute Name)

Explanation

Platinum#3CountRange
Platinum#3 count range: Wx
Wx
Platinum#3ConversionTa
Platinum#3 conversion table: Wa
bleWa
Platinum#3ConversionTa
Platinum#3 conversion table: Wb
bleWb
Platinum#3ConversionTa
Platinum#3 conversion table: Wc
bleWc
Platinum#3ConversionTa
Platinum#3 conversion table: Wd
bleWd

Concrete Values or Examples
349,1454,2000,2555,3059,3566,4020,4095

Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

0.000000,0.009100,0.009100,0.009100,0.009900,0.009900,0.008500,0.000000

Fix

0.000000,6.845000,6.803800,6.803800,4.719500,4.719500,9.835000,44.000000

Fix

0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0

Fix

6G-1.037,10G-1.032,18G-1.025,23G-1.032,36G-1.029,50G-0.000,52G-0.000,89GA-1.025,89
GB-1.029
6G--0.003,10G--0.003,18G--0.003,23G--0.004,36G--0.004,50G-0.000,52G-0.000,89GA--0.0
CoefiicientAhv
Coefficient: Ahv
03,89GB--0.004
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52G-0.000,89GA--0.0
CoefficientAov
Coefficient: Aov
22,89GB--0.024
6G-1.037,10G-1.031,18G-1.025,23G-1.034,36G-1.029,50G-0.000,52G-0.000,89GA-1.028,89
CoefficientAhh
Coefficient: Ahh
GB-1.031
6G--0.003,10G--0.002,18G--0.003,23G--0.006,36G--0.004,50G-0.000,52G-0.000,89GA--0.0
CoefficientAvh
Coefficient: Avh
06,89GB--0.006
6G--0.034,10G--0.029,18G--0.022,23G--0.028,36G--0.024,50G-0.000,52G-0.000,89GA--0.0
CoefficientAoh
Coefficient: Aoh
22,89GB--0.024
6GV-2.800, 6GH-2.800, 10GV-2.800, 10GH-2.800, 18GV-2.800, 18GH-2.800, 23GV-2.800,
Brightness temperature of the deep
CSMTemperature
23GH-2.800, 36GV-2.800, 36GH-2.800, 50GV-0.000, 52GV-0.000, 89GAV-2.800,
space
89GAH-2.800, 89GBV-2.800, 89GBH-2.800
CoRegistrationParameter
6G-0.10450, 10G--0.34960, 18G--0.32010, 23G--0.25950, 36G--0.31510, 50G-0.00000
Co-registration parameter: A1
erA1(These are stored same values as level 1B product.)
CoRegistrationParameter
6G--1.04960, 10G--0.64760, 18G--0.20170, 23G--0.26610, 36G--0.21810, 50G-0.00000
Co-registration parameter: A2
erA2(These are stored same values as level 1B product.)
CoefficientAvv

Fix/
ExampleCoefficient: Avv* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)

L1M-10

Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix
Fix

Table 1.2-2 Product Meta Items (4/4)
Items (Attribute Name)
Re-samplingMethod
PixelSpacingExcept89G
PixelSpacingFor89G
ImageSizeExcept89G(Pixel)
ImageSizeFor89G(Pixel)
ImageSizeExcept89G(Line)
ImageSizeFor89G(Line)

Explanation
Re-sampling method
Pixel resolution except 89 GHz
Pixel resolution of 89 GHz
Image size (pixel) except 89 GHz
Image size (pixel) of 89 GHz
Image size (line) except 89 GHz
Image size (line) of 89 GHz

Concrete Values or Examples
NN
10km
5km
300
600
300
600

* The un-hatched indicates the peculiar information of the level 1B Map product. (Refer to the level 1A product description for the hatched.)* The level 1B Map product does not store following product meta data in level 1B product.
−
CalibrationCurveCoefficient#1-#4−
CalibrationMethod−
HTSCorrectionParameterVersion−
SpillOverParameterVersion−
CSMInterporationParameterVersion−
Absolute89PositioningParameterVersion

L1M-11Fix/
Example
Fix
Fix
Fix
Fix
Fix
Fix
Fix

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

Table 1.2-3
Items
6GHz-V Brightness Temperature
6GHz-H Brightness Temperature
10.65GHz-V Brightness Temperature
10.65GHz-H Brightness Temperature
18.7GHz-V Brightness Temperature
18.7GHz-H Brightness Temperature
23.8GHz-V Brightness Temperature
23.8GHz-H Brightness Temperature
36.5GHz-V Brightness Temperature
36.5GHz-H Brightness Temperature
50.3GHz-V Brightness Temperature #1
52.8GHz-V Brightness Temperature #1
89.0GHz-V Brightness Temperature
89.0GHz-H Brightness Temperature
Sun Azimuth
Sun Elevation
Earth Incidence #2
Earth Azimuth
Land/Ocean flag for 6,10,18,23,37,50,89A
Data Quality Except89G
Data Quality For 89G

Data Size and Scaling Factor of Attribute Items
Byte
Type
Scale factor2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
2
signed int
0.1
1
signed char
0.02
2
signed int
0.01
1
unsigned char
1.0
1
1
-

#1 50GHz and 52GHz are filled with 0 for AMSR-E#2 The Earth Incidence has also sub-attribute “OFFSET”. This offset is set to 55.0.

L1M-12

Units
K
K
K
K
K
K
K
K
K
K
K
K
K
K
deg
deg
deg
deg
％
-

Dimension
300×300
300×300
300×300
300×300
300×300
300×300
300×300
300×300
300×300
300×300
300×300
300×300
600×600
600×600
300×300
300×300
300×300
300×300
300×300
300×300
600×600

Pixel(0,0)(Pixel-1,0)

2 byteLine(0,Line-1)

6GHz-V Brightness Temperature(Pixel-1, Line-1)(All other data have the same structure)(Note: 50-V, 52-V SDSs are filled with 0)

Figure 1.2-2 Structure of the Mapped Brightness Temperature (Image Data)

L1M-13

Pixel(Pixel-1,0)(0,0)
2 byteLine(0,Line-1)

Sun Azimuth(Pixel-1, Line-1)

Pixel
(0,0)

(Pixel-1,0)

2 byteLine(0,Line-1)

Sun Elevation(Pixel-1, Line-1)

Figure 1.2-3 Structure of Sun Azimuth and Sun Elevation

L1M-14

Pixel(Pixel-1,0)(0,0)
1 byteLine(0,Line-1)

Earth Incidence(Pixel-1, Line-1)

Pixel
(0,0)

(Pixel-1,0)

2 byteLine(0,Line-1)

Earth Azimuth(Pixel-1, Line-1)

Figure 1.2-4 Structure of Earth Incidence and Earth Azimuth

L1M-15

Figure 1.2-5 Structure of Land/Ocean Flag

L1M-16

Pixel(0,0)(Pixel-1,0)

1 byteLine(0,Line-1)

Data Quality Except 89G
Data Quality For 89G

Figure 1.2-6 Structure of Data Quality

L1M-17(Pixel-1, Line-1)1.3.

Mapping method

The level 1B Map product is the re-sampled image that used one of the following map projection methods.
- Equirectangular projection- Mercator projection- Polar Stereo projection
1.3.1.

Equirectangular projection

The latitude and longitude (φ , λ ) of the observing point are convertible for the equirectangular coordinates ( x, y )by the following formula.

x=λ
y =φ

1.3.2.

Mercator projection

In Mercator method, the latitude and longitude (φ , λ ) are convertible for the Mercator coordinates ( x, y ) by
the following formula.

x = Re(λ − λ 0)
1 − e sin(φ − φ 0) e / 2 
π 1
y = Re ln tan( + (φ − φ 0)
) 
4 2
1 + e sin(φ − φ 0)
In the above formula, Re is the earth equatorial radius (the longer radius), and e is the eccentricity of the earth
expressed in the following formula using the longer radius Ra, and the shorter radius Rb.
2

e = 1 − Rb2
Ra
1.3.3.

Polar Stereo

In Polar Stereo method, the latitude and longitude (φ , λ ) are converted into ( x, y ) by following steps.
(1) Calculate the geocentric latitude

φ ' = ta n−1{(1 − e2) tan φ }(2) Calculate the x,y in the Polar Stereo coordinate
Using the following formula, the positions of x,y are calculated1) In case of the northern hemisphere,(1 − e 2 ) cos φx⋅ sin(−λ )= − Rem0(1 − e 2 ) cos 2 φ + sin φ '(1 − e 2 ) cos φy⋅ cos(−λ )= − Rem0(1 − e 2 ) cos 2 φ + sin φ '2) In case of the southern hemisphere,(1 − e 2 ) cos φx⋅ sin(−λ )= Re
m0(1 − e 2 ) cos 2 φ + sin φ '(1 − e 2 ) cos φy⋅ cos(−λ )= Re
m0(1 − e 2 ) cos 2 φ + sin φ 'L1M-18

In the above formula, the Re, e, m0 are defined as follows,
Re : The earth equatorial radiuse : The eccentricity
m0 : The scaling factor at the origin (1.0)
1.4.

Re-sampling Method

The value of 1 pixel of the map-projected image is re-sampled brightness temperature of the level 1B product. The
re-sampling method used by level 1B Map processing is only the nearest neighbor method (the NN method).
1.4.1.

The Nearest Neighbor Method

As the value of the observation point P’ (u, v), the nearest neighbor method adopts the nearest observation point P
from four points, which enclose the observation point P’ (u, v), and it is expressed with the following formula.
P’u,v = Piji = [u+0.5]
j = [v+0.5]
In the above formula, [ ] is the gauss symbol, and that value is expressed with an integer value.
P (j, i)P (j+1, i)P’ (u, v)

P (j, i+1)

P (j+1, i+1)

Figure 1.4-1 Explanation of the nearest neighbor method

L1M-19

1.5.

Data volume size of a productThe data volume size of AMSR-E level 1B Map product is shown in Table 1.5-1.

Item
6.9GHz-V Mapped
Brightness Temperature
6.9GHz-H Mapped
Brighness Temperature
10.7GHz-V Mapped
Brightness Temperature
10.7GHz-H Mapped
Brighness Temperature
18.7GHz-V Mapped
Brightness Temperature
18.7GHz-H Mapped
Brighness Temperature
23.8GHz-V Mapped
Brightness Temperature
23.8GHz-H Mapped
Brighness Temperature
36.5GHz-V Mapped
Brightness Temperature
36.5GHz-H Mapped
Brighness Temperature
50.3GHz-V Mapped
Brightness Temperature
52.8GHz-V Mapped
Brightness Temperature
89.0GHz-V Mapped
Brightness Temperature
89.0GHz-H Mapped
Brighness Temperature
Sun Azimuth
Sun Elevation
Earth Incidence
Earth Azimuth
Land/Ocean Flag
DataQualityExcept89G
DataQualityFor89G
Total
Volume/Granule ( MB )Volume/Day ( GB )Volume/Month ( GB )Table 1.5-1 Estimation of the Data Volume
No. ofNo. ofSemi
No. of
Line
Bytes
Total
Pixel

Remark

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

300

300

2

180000

600

600

2

720000

600

600

2

720000

300
300
300
300
300
300
600

300
300
300
300
300
300
600

2
2
1
2
1
1
1

18000018000090000
180000630000 1*7 for 6,10,23,37,50,89A
90000
3600005310000
5.1
0.143 29 Files/Day
4.302 30 Days/Month

L1M-201.6. The others
1.6.1. The data range of the product
Since the observation width of AMSR-E is about 1450 km, the map-projected region (3000 km x 3000 km) is not
filled with brightness temperature. Therefore, the region that cannot acquire the brightness temperature value fromthe level 1B product stores the dummy value (0). (See Figure 1.6.1-1) And items of 50 GHz and 52 GHz verticalpolarization which are not observed by AMSR-E also stores the dummy value.

3000 km

Filled with 03000 km1450 km

The area of the observation data

Filled with 0(*1)*1: Earth Incidence sets -128.

Figure 1.6.1-1 the region of map image data

L1M-21

In case of the Polar Stereo projection, directions of mapped image between Northern Hemisphere and Southern
Hemisphere differ as shown in Figure 1.6.1-2 and Figure 1.6.1-3.

Figure 1.6.1-2

Direction of map projection（the Northern Hemisphere）

Figure 1.6.1-3

Direction of map projection（the Southern Hemisphere）

L1M-22

1.6.2.

Coordinate System

The position information stored in the AMSR-E level 1B Map product is the latitude and longitude that are used formap projection of the observation brightness temperature.
It is represented by the Greenwich coordinate system (earth fixed coordinate system), and the range of latitude isfrom -90 to 90 degrees, and the range of longitude is from -180 to 180 degrees. The earth model currently used bygeometrical calculation is WGS84.
1.6.3.

Scaling Factor

In order to make data volume small, scaling factors are applied for some floating number in AMSR-E level 1B Map.
The scale factor is stored with the data unit in the attribute information on Vdata or SDS.
Moreover, the latitude and the longitude information on a center and four corners are stored in attribute informationof the map projected brightness temperature.

L1M-23

2.

Data Explanation

This chapter shows explanation of each data item of AMSR-E level 1B Map product excluding common items forlevel 1A product of level 1B product.
2.1. Core metadata（1） ShortName
The abbreviated name of a product is stored. Please refer to the level 1A product description for the details.
（2） LocalGranuleID
ID that according to the granule ID system used at EOC is stored. The granule ID of AMSR-E level 1B Map productis defined by following.
P1AMEYYMMDDPPPMX _KNLLBCnnREVSnn[Scene ID]
P1
P1 (Fixed: EOS-PM1 Aqua)
AME
AME (Fixed: AMSR-E)
YYMMDD
Date of data acquisition start (UT)PPP
Path number at the observation start point (001 – 233)
M
M (M: regular process)X
A or D (Orbit direction, A: Ascending, D: Descending)[Product ID]
K
O (Fixed: Order project)N
0 (Fixed: Spare)LL
1M (Fixed: for level 1B Map)
B
Mapping method (E: Equirectangular; M: Mercator; P: Polar Stereo)
CnnStandard Latitude (C00: Scene Center; D00: Standard Latitude;
Snn: Latitude in the south; Nnn: Latitude in the north)R
N (Fixed: re-sampling method, Nearest Neighbor)E
W(Fixed: Earth ellipse model, WGS84)
V
T (Fixed: Map direction, True North)Snn
Center Latitude (S90 – N90)
（3） ProcessingLevelID
The processing level is stored. Please refer to the level 1A product description for the details.

L1M-24

（4） GringPointLatitude1, GringPointLongitude1 – GringPointLatitude4, GringPointLongitude4
The latitude and longitude of the four corners corresponding to the map-projected image of 89 GHz are stored. They
are set as a counterclockwise from the upper left, as shown in Figure 2.1-1.

N
1

4

2

3

By the equirectangular projection and
the Mercator projection, the upperside shows north.
About the vertical direction of the
Polar Stereo projection, refer toFigure 1.6.1-2 and Figure 1.6.1-3.

Figure 2.1-1 the order of GringPoint（5） PGEName
The product generation software name is stored. Please refer to the level 1A product description for the details.
（6） AutomaticQAFlag
The automatic inspection result of data processing is stored. The items of the automatic inspections are shown in theattribute “AutomaticQAFlagExplanation”. And the following value is stored. Automatic inspection in level 1B Map
processing is the check results of calculation anomaly about the map projection and the quality information ofbrightness temperature. The inspection result and the setting value of the product are the correspondence shown
below.
PASS

Good(When all check items are in the state of'OK'.)FAIL

Poor(When some check items are in the state of

FAIL

NG

(When all check items are in the state of'NG'.)'NG'.)（7） AutomaticQAFlagExplanation
The contents of automatic inspection for level 1B Map processing and its thresholds are stored.
1.ProcessedAnomalyQA:Less than 20 is available->OK,
2.InputAnomalyQA:Less than 20 is available->OK,
All items are OK, 'PASS' is employed

L1M-25

2.2. Product metadata(1) MapProjectionMethod
One of the following 3 kinds of mapping methods is stored.
EquivalentLongitude/Latitude

Equirectangular

Mercator projection

The Mercator

Polar Stereo projection

The Polar Stereo

projection(2) ResamplingMethod
The nearest neighbor method “NN” is stored for AMSR-E mapping process.
(3) PixelSpacingExcept89G
The fixed value “10km” is stored except 89GHz as a pixel resolution.
(4) PixelSpacingFor89G
The fixed value “5km” is stored for 89GHz as a pixel resolution.
(5) ImageSizeExcept89G (Pixel)
The fixed value “300” pixels are stored except 89GHz as an image size.
(6) ImageSizeExcept89G (Line)The fixed value “300” lines are stored except 89GHz as an image size.
(7) ImageSizeFor89G (Pixel)
The fixed value “300” pixels are stored for 89GHz as an image size.
(8) ImageSizeFor89G (Line)The fixed value “300” lines are stored for 89GHz as an image size.

L1M-26

2.3. Explanation of Each Data
(1) 6GHz-V Brightness Temperature
The observation brightness temperature of 6 GHz vertical polarization after map projection is stored.
* In the attribute information of observation brightness temperature after map projection, the following information is stored.
This is applied for all frequencies and polarizations. The latitude and longitude of the center and four corners of eachfrequency are the corrected value with the co-registration parameter (CoRegistrationParmeterA1/A2). Therefore theregistration gap between frequencies arises, since map projection is performed on the basis of 89 GHz.

Scaling Factor
Unit
Center Latitude/Longitude
Upper Left Latitude/Longitude
Lower Left Latitude/Longitude
Upper Right Latitude/Longitude
Lower Right Latitude/Longitude

0.1 (This item is the same in all frequencies)
K
latitude, longitude of the center position [deg]latitude, longitude of the upper left position [deg]latitude, longitude of the lower left position [deg]latitude, longitude of the upper right position [deg]latitude, longitude of the lower right position [deg]* The following value is stored for the abnormal observation data. This is applied for all frequencies and polarizations.

0-9999-32768The others, negative value

Outside of the observation range
Deficit data value
The parity error value
The anomaly value over the limit range(2) 6GHz-H Brightness Temperature
The observation brightness temperature of 6 GHz horizontal polarization after map projection is stored.
(3) 10.65GHz-V Brightness Temperature
The observation brightness temperature of 10.65 GHz vertical polarization after map projection is stored.
(4) 10.65GHz-H Brightness Temperature
The observation brightness temperature of 10.65 GHz horizontal polarization after map projection is stored.
(5) 18.7GHz-V Brightness Temperature
The observation brightness temperature of 18.7 GHz vertical polarization after map projection is stored.
(6) 18.7GHz-H Brightness Temperature
The observation brightness temperature of 18.7 GHz horizontal polarization after map projection is stored.
(7) 23.8GHz-V Brightness Temperature
The observation brightness temperature of 23.8 GHz vertical polarization after map projection is stored.
(8) 23.8GHz-H Brightness Temperature
The observation brightness temperature of 23.8 GHz horizontal polarization after map projection is stored.
(9) 36.5GHz-V Brightness Temperature
The observation brightness temperature of 36.5 GHz vertical polarization after map projection is stored.
(10) 36.5GHz-H Brightness Temperature
The observation brightness temperature of 36.5 GHz horizontal polarization after map projection is stored.

L1M-27

(11) 50.3GHz-V Brightness Temperature
In AMSR-E, since 50.3 GHz vertical polarization is not observed, it is filled with 0.
(12) 52.8GHz-V Brightness Temperature
In AMSR-E, since 52.8 GHz vertical polarization is not observed, it is filled with 0.
(13) 89.0GHz-V Brightness Temperature
The observation brightness temperature of 89.0 GHz vertical polarization after map projection is stored.
(14) 89.0GHz-H Brightness Temperature
The observation brightness temperature of 89.0 GHz horizontal polarization after map projection is stored.
(15) Sun Azimuth
The sun azimuth angle in each pixel after map projection is stored. (Please refer to the level 1A product description
for the details in subsequent items).
(16) Sun Elevation
The sun elevation angle in each pixel after map projection is stored.
(17) Earth Incidence
The earth incidence angle in each pixel after map projection is stored.
(18) Earth Azimuth
The earth azimuth angle in each pixel after map projection is stored.
(19) Land/Ocean Flag
The land coverage percentage of the observation footprint of AMSR-E is stored for each frequency.
(20) Data Quality Except 89G
The data quality is stored for every pixel in the map projected observation brightness temperature except 89GHz.
Each bit of data quality is set 0 for normal and 1 for abnormal (Figure. 2.3-1).
6GHz-V
6GHz-H
10GHz-V
10GHz-H
18GHz-V
18GHz-H
23GHz-V
23GHz-H
36GHz-V
36GHz-H
50GHz-V
52GHz-V

0
15
(MSB)

0 0

0 Fix

0

0
(LSB)

Figure 2.3-1 Details of the quality information

L1M-28

(21) Data Quality For 89G
The data quality is stored for every pixel in the map projected observation brightness temperature of 89GHz. Each
bit of the data quality is set 0 for normal and 1 for abnormal (Figure. 2.3-2).
89GHz-V
89GHz-H

Fix

0

0

0

0

0

0

8

0

(MSB)

(LSB)

Figure 2.3-2 Details of the quality information

L1M-29