Level 2A Data Fields

Notations Used in this Document

The following notations are used throughout this document:

Int8	8-bit (1-byte) signed integer
Int16	16-bit (2-byte) signed integer
Int32	32-bit (4-byte) signed integer
Uint8	8-bit (1-byte) unsigned integer
Uint16	16-bit (2-byte) unsigned integer
Float32	32-bit (4-byte) floating-point integer
Float64	64-bit (8-byte) floating-point integer
Char	8-bit character

Res. 1	56-km footprint
Res. 2	37-km footprint
Res. 3	21-km footprint
Res. 4	11-km footprint
Res. 5	5-km footprint

JAXA	Japan Aerospace Exploration Agency
RSS	Remote Sensing Systems (U.S.)

Note: For data with scale and offset values, the data values can be obtain in the specified units with the following equation:

data value in units = (stored data value * scale factor) + offset

Example: T_b (kelvin) = (stored data value * 0.01) + 327.68

Scaling factors and offsets are provided with the local attributes of each HDF-EOS file. You should check each file to ensure correct values. See the Software and Tools Web page for help reading these data.

Low_Res_Swath Data Fields

See Notations Used in this Document for notation definitions.

Field	Type	Dimension per Scan	Units	Scale Factor	Offset	Source
Antenna_Temp_Coefficients_6_to_52	Float32	12 x 3	kelvin, kelvin/count, kelvin/countsq	n/a	n/a	RSS
Data_Quality	Float32	128	n/a	n/a	n/a	JAXA
Observation_Supplement	Uint16	27	n/a	n/a	n/a	JAXA
Interpolation_Flag_6_to_52	Int8	12 x 16	n/a	n/a	n/a	JAXA
Position_in_Orbit	Float64	1	JAXA_convention_for_fractional_orbit	n/a	n/a	JAXA
Navigation_Data	Float32	6	m, m/s	n/a	n/a	JAXA
Attitude Data	Float32	3	degree	n/a	n/a	JAXA
SPC_Temperature_Count	Uint16	20	count	n/a	n/a	JAXA
Earth_Incidence	Int16	243	degree	0.0050	n/a	JAXA
Earth_Azimuth	Int16	243	degree	0.01	n/a	JAXA
Sun_Elevation	Int16	243	degree	0.1	n/a	JAXA
Sun_Azimuth	Int16	243	degree	0.1	n/a	JAXA
RX_Offset_Gain_Count	Uint16	32	count	n/a	n/a	JAXA
SPS_Temperature_Count	Uint16	32	count	n/a	n/a	JAXA
Land/Ocean_Flag_for_6_10_18_23_36_50_89A	Uint8	243 x 7	%	n/a	n/a	JAXA
Cold_Sky_Mirror_Count_6_to_52	Int16	16 x 12	radiometer_counts	n/a	n/a	JAXA
Hot_Load_Count_6_to_52	Int16	16 x 12	radiometer_counts	n/a	n/a	JAXA
6.9V_Res.1_TB_(not-resampled) 6.9H_Res.1_TB_(not-resampled) 10.7V_Res.2_TB_(not-resampled) 10.7H_Res.2_TB_(not-resampled) 18.7V_Res.3_TB_(not-resampled) 18.7H_Res.3_TB_(not-resampled) 23.8V_Approx._Res.3_TB_(not-resampled) 23.8H_Approx._Res.3_TB_(not-resampled) 36.5V_Res.4_TB_(not-resampled) 36.5H_Res.4_TB_(not-resampled)	Int16	243	kelvin	0.01	327.68	RSS, calculated from JAXA counts
6.9V_Res.1_TB 6.9H_Res.1_TB 10.7V_Res.1_TB 10.7V_Res.2_TB 10.7H_Res.1_TB 10.7H_Res.2_TB 18.7V_Res.1_TB 18.7V_Res.2_TB 18.7H_Res.1_TB 18.7H_Res.2_TB 23.8V_Res.1_TB 23.8V_Res.2_TB 23.8V_Res.3_TB 23.8H_Res.1_TB 23.8H_Res.2_TB 23.8H_Res.3_TB 36.5V_Res.1_TB 36.5V_Res.2_TB 36.5V_Res.3_TB 36.5H_Res.1_TB 36.5H_Res.2_TB 36.5H_Res.3_TB 89.0V_Res.1_TB 89.0V_Res.2_TB 89.0V_Res.3_TB 89.0V_Res.4_TB 89.0H_Res.1_TB 89.0H_Res.2_TB 89.0H_Res.3_TB 89.0H_Res.4_TB	Int16	243	kelvin	0.01	327.68	RSS
Scan_Quality_Flag	Int32	1	flag	n/a	n/a	RSS
Channel_Quality_Flag_6_to_52	Int16	12	flag	n/a	n/a	RSS
Resampled_Channel_Quality_Flag	Int16	30	flag	n/a	n/a	RSS
Effective_Cold_Space_Temperature_6_to_52	Float32	12	kelvin	n/a	n/a	RSS
Effective_Hot_Load_Temperature_6_to_52	Float32	12	kelvin	n/a	n/a	RSS
Res1_Surf Res2_Surf Res3_Surf Res4_Surf	Int8	243	%land	0.4	n/a	RSS
Sun_Glint_Angle	Int16	243	degree	0.01	n/a	RSS
Geostationary_Satellite_Glint_Angle	Int16	243	degree	0.01	n/a	RSS

High_Res_A_Swath and High_Res_B_Swath Data Fields

See Notations Used in this Document for notation definitions.

Element	Type	Dimension per Scan	Unit	Scale Factor	Offset	Source
Antenna_Temp_Coefficients_89A	Float32	2 x 3	kelvin, kelvin/count, kelvin/countsq	n/a	n/a	RSS
Interpolation_Flag_89_A	Int8	2 x 32	n/a	n/a	n/a	RSS
Cold_Sky_Mirror_Count_89A	Int16	32 x 2	radiometer_counts	n/a	n/a	JAXA
Hot_Load_Count_89A	Int16	32 x 2	radiometer_counts	n/a	n/a	JAXA
89.0V_Res.5A_TB_(not-resampled)	Int16	486	kelvin	0.01	327.68	RSS
89.0H_Res.5A_TB_(not-resampled)	Int16	486	kelivn	0.01	327.68	RSS
Scan_Quality_Flag_89A	Int32	1	flag	n/a	n/a	RSS
Channel_Quality_Flag_89A	Int16	2	flag	n/a	n/a	RSS
Effective_Cold_Space_Temperature_89A	Float32	2	kelvin	n/a	n/a	RSS
Effective_Hot_Load_Temperature_89A	Float32	2	kelvin	n/a	n/a	RSS
Res5A_Surf	Int8	486	%land	4.0	n/a	RSS

Geolocation Fields

See Notations Used in this Document for notation definitions.

The Geolocation fields for the High_Res_A_Swath and the High_Res_B_Swath are completely analogous to those of the Low_Res_Swath with 486 observations per scan rather than 243.

Field	Type	Dimension per scan	Source	Units
Time	Float64	1	JAXA	TAI93 (seconds since midnight, 01 January 1993)
Latitude	Float32	243	RSS	degree
Longitude	Float32	243	RSS	degree

Global Attributes

See Notations Used in this Document for notation definitions.

The swath attribute fields of the High_Res_A_Swath and the High_Res_B_Swath are identical to those of the Low_Res_Swath except that the Resampled_Channel_Sequence field is omitted because high-resolution swaths have no resampled channels. Also, the Level1A_Channel_Sequence field was modified to describe the order of the elements of the High_Res_A_Swath Level1A_Scan_Chan_Quality_Flag rather than that of the Low_Res_Swath quality flag.

Attribute	Type
HDFEOSVersion	Char
StructMetadata.0	Char
ProcessingLevelID	Char
ProcessingFacility	Char
SensorShortName	Char
EquatorCrossingLongitude	Char
OrbitSemiMajorAxis	Char
OrbitEccentricity	Char
OrbitArgumentPerigee	Char
OrbitInclination	Char
OrbitPeriod	Char
EllipsoidName	Char
SemiMajorAxisofEarth	Char
FlatteningRatioofEarth	Char
L1AProductionDataTime	Char
L1ANumerofMissingScans	Char
L2AProcessingDate	Char
PlatformShortName	Char
EquatorCrossingTime	Char
EquatorCrossingDate	Char
EphemerisType	Char
EphemerisGranulePointer	Char
EphemerisQA	Char
NumberofMissingPackets	Char
QAPercentParityErrorData	Char
Altitude	Char
RangeBeginningDate	Char
RangeBeginningTime	Char
RangeEndingDate	Char
RangeEndingTime	Char
InputPointer	Char
PlatinumThermistorWbCoeff	Char
PlatinumThermistorWcCoeff	Char
PlatinumThermistorSegment	Char
CoefficientAvv	Char
CoefficientAhv	Char
CoefficientAovTimesCold	Char
CoefficientAhh	Char
CoefficientAvh	Char
CoefficientAohTimesCold	Char
PGE_Version	Char
StartOrbitNumber	Float32
StopOrbitNumber	Float32
LongitudeOfAscendingNode	Float
AscendingNodeDate	Char
AscendingNodeTime	Char
OrbitDirection	Char
NumberofScans	Int32
SoftwareRevisionDate	Char
CoreMetadata.0	Char