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Description

Version 07 is the current version of the data set. Older versions will no longer be available and have been superseded by Version 07.

The 1BGMI algorithm uses a non-linear three-point in-flight calibration to derive antenna temperature (Ta) and convert Ta to Tb using GMI antenna pattern corrections. The four-point calibration, which utilizes noise diode measurements, is used to monitor the sensor non-linearty. The noise diode measurements also provide a hot load back-up calibration in case hot load measurements are lost. Details are in the GMI ATBD. The 1BGMI algorithm and software transform Level 0 counts into geolocated and calibrated brightness temperatures (Tb) for 13 GMI channels.

Product Summary

Platforms
GPM
Instruments
GMI
Spatial Extent

N: 70 S: -70 E: 180 W: -180

Geographic Region
TROPICS
Coordinate System
GEODETIC
Granule Spatial Representation
GEODETIC
Temporal Extent
2014-03-04 to Present
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C2259345403-GES_DISC
Data State
ACTIVE
Number of Files/Granules
66589
Processing Level
1B
Published
Updated
Science Keywords
Atmospheric Water Vapor ,
Precipitation

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Precipitation Processing System (PPS) At NASA GSFC. (2022). GPM GMI Brightness Temperatures L1B 1.5 hours 13 km V07 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/GPM/GMI/GPM/1B/07 Date Accessed: 2025-12-14

Documents

READ-ME

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

ANOMALIES

GENERAL DOCUMENTATION

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
S1/calCounts/coldLoadnDiodeReading S1/calCounts/coldLoadnDiodeReading counts uint16 0 N/A N/A
S1/calCounts/coldLoadReading S1/calCounts/coldLoadReading counts uint16 0 N/A N/A
S1/calCounts/hotLoadnDiodeReading S1/calCounts/hotLoadnDiodeReading counts uint16 0 N/A N/A
S1/calCounts/hotLoadReading S1/calCounts/hotLoadReading counts uint16 0 N/A N/A
S1/calCounts/hotLoadThermisterTemp S1/calCounts/hotLoadThermisterTemp K float32 -9999.900390625 N/A N/A
S1/calibration/calibrationQCflag S1/calibration/calibrationQCflag N/A int16 -9999 N/A N/A
S1/calibration/coldSkyTemp S1/calibration/coldSkyTemp K float32 -9999.900390625 N/A N/A
S1/calibration/derivedNonLinearity S1/calibration/derivedNonLinearity K float32 -9999.900390625 N/A N/A
S1/calibration/diodeCoupledTemp S1/calibration/diodeCoupledTemp K float32 -9999.900390625 N/A N/A
S1/calibration/diodeFlag S1/calibration/diodeFlag counts int16 -9999 N/A N/A
S1/calibration/gain S1/calibration/gain K float32 -9999.900390625 N/A N/A
S1/calibration/hotLoadTemp S1/calibration/hotLoadTemp K float32 -9999.900390625 N/A N/A
S1/calibration/meanColdSkyCntnDiode S1/calibration/meanColdSkyCntnDiode N/A uint16 65535 N/A N/A
S1/calibration/meanColdSkyCount S1/calibration/meanColdSkyCount N/A uint16 65535 N/A N/A
S1/calibration/meanHotLoadCntnDiode S1/calibration/meanHotLoadCntnDiode N/A uint16 65535 N/A N/A
S1/calibration/meanHotLoadCount S1/calibration/meanHotLoadCount N/A uint16 65535 N/A N/A
S1/calibration/nonLinearGain S1/calibration/nonLinearGain N/A float32 -9999.900390625 N/A N/A
S1/calibration/offset S1/calibration/offset K float32 -9999.900390625 N/A N/A
S1/calibration/onOrbitNonLinearity S1/calibration/onOrbitNonLinearity K float32 -9999.900390625 N/A N/A
S1/calibration/receiverGain S1/calibration/receiverGain N/A float32 -9999.900390625 N/A N/A
S1/calibration/receiverTemp S1/calibration/receiverTemp N/A float32 -9999.900390625 N/A N/A
S1/incidenceAngle S1/incidenceAngle degrees float32 -9999.900390625 N/A N/A
S1/Latitude S1/Latitude degrees float32 -9999.900390625 N/A N/A
S1/Longitude S1/Longitude degrees float32 -9999.900390625 N/A N/A
S1/moonVectorInstFrame S1/moonVectorInstFrame counts float32 -9999.900390625 N/A N/A
S1/navigation/dprAlt S1/navigation/dprAlt m float32 -9999.900390625 N/A N/A
S1/navigation/greenHourAng S1/navigation/greenHourAng degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAlt S1/navigation/scAlt m float32 -9999.900390625 N/A N/A
S1/navigation/scAttPitchGeoc S1/navigation/scAttPitchGeoc degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAttPitchGeod S1/navigation/scAttPitchGeod degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAttRollGeoc S1/navigation/scAttRollGeoc degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAttRollGeod S1/navigation/scAttRollGeod degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAttYawGeoc S1/navigation/scAttYawGeoc degrees float32 -9999.900390625 N/A N/A
S1/navigation/scAttYawGeod S1/navigation/scAttYawGeod degrees float32 -9999.900390625 N/A N/A
S1/navigation/scHeadingGround S1/navigation/scHeadingGround degrees float32 -9999.900390625 N/A N/A
S1/navigation/scHeadingOrbital S1/navigation/scHeadingOrbital degrees float32 -9999.900390625 N/A N/A
S1/navigation/scLat S1/navigation/scLat degrees float32 -9999.900390625 N/A N/A
S1/navigation/scLon S1/navigation/scLon degrees float32 -9999.900390625 N/A N/A
S1/navigation/scPos S1/navigation/scPos m float32 -9999.900390625 N/A N/A
S1/navigation/scVel S1/navigation/scVel m/s float32 -9999.900390625 N/A N/A
S1/navigation/timeMidScan S1/navigation/timeMidScan s float64 -9999.9 N/A N/A
S1/navigation/timeMidScanOffset S1/navigation/timeMidScanOffset s float64 -9999.9 N/A N/A
S1/RFIFlag S1/RFIFlag N/A int16 -9999 N/A N/A
S1/sampleHeader/blanking S1/sampleHeader/blanking N/A int8 -99 N/A N/A
S1/sampleHeader/earthViewFirstSample S1/sampleHeader/earthViewFirstSample N/A int16 -9999 N/A N/A
S1/sampleHeader/sampleNumber S1/sampleHeader/sampleNumber N/A int16 -9999 N/A N/A
S1/sampleHeader/tachMicroSeconds S1/sampleHeader/tachMicroSeconds N/A uint16 0 N/A N/A
S1/sampleHeader/tachSeconds S1/sampleHeader/tachSeconds N/A uint32 0 N/A N/A
S1/satAzimuthAngle S1/satAzimuthAngle degrees float32 -9999.900390625 N/A N/A
S1/scanStatus/acsModeMidScan S1/scanStatus/acsModeMidScan N/A int8 -99 N/A N/A
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