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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 Older versions will no longer be available and have been superseded by Version 07.

All 1C products have a common L1C data structure, simple and generic. Each L1C swath includes scan time, latitude and longitude, scan status, quality, incidence angle, Sun glint angle, and the intercalibrated brightness temperature (Tc). One or more swaths are included in a product. The radiometer data are recalibrated to a common basis so that precipitation products derived from them are consistent. 1CGMI contains common calibrated brightness temperatures from the GMI passive microwave instrument flown on the GPM satellite. 1C-R GMI is a remapped version of 1CGMI which is explained at the end of this section. Swath S1 has 9 channels which are similar to TRMM TMI (10V 10H 19V 19H 23V 37V 37H 89V 89H). Swath S2 has 4 channels similar to AMSU-B (166V 166H 183+/-3V 183+/-8V). Data for both swaths is observed in the same revolution of the instrument.

Product Summary

Platforms
GPM
Instruments
GMI
Spatial Extent

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

Location
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
C2259345484-GES_DISC
Data State
ACTIVE
Number of Files/Granules
67743
Processing Level
1
Published
Updated
Science Keywords
Atmospheric Water Vapor ,
Precipitation ,
Brightness Temperature

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 Common Calibrated Brightness Temperatures Collocated L1C 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/1C/07 Date Accessed: 2026-02-27

Documents

READ-ME

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

ANOMALIES

GENERAL DOCUMENTATION

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
S1/incidenceAngle S1/incidenceAngle degrees float32 -9999.900390625 N/A N/A
S1/incidenceAngleIndex S1/incidenceAngleIndex N/A int8 -99 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/Quality S1/Quality N/A int8 -99 N/A N/A
S1/ScanTime/DayOfMonth S1/ScanTime/DayOfMonth days int8 -99 N/A N/A
S1/ScanTime/DayOfYear S1/ScanTime/DayOfYear days int16 -9999 N/A N/A
S1/ScanTime/Hour S1/ScanTime/Hour hours int8 -99 N/A N/A
S1/ScanTime/MilliSecond S1/ScanTime/MilliSecond ms int16 -9999 N/A N/A
S1/ScanTime/Minute S1/ScanTime/Minute minutes int8 -99 N/A N/A
S1/ScanTime/Month S1/ScanTime/Month months int8 -99 N/A N/A
S1/ScanTime/Second S1/ScanTime/Second s int8 -99 N/A N/A
S1/ScanTime/SecondOfDay S1/ScanTime/SecondOfDay s float64 -9999.9 N/A N/A
S1/ScanTime/Year S1/ScanTime/Year years int16 -9999 N/A N/A
S1/SCstatus/FractionalGranuleNumber S1/SCstatus/FractionalGranuleNumber N/A float64 -9999.9 N/A N/A
S1/SCstatus/SCaltitude S1/SCstatus/SCaltitude km float32 -9999.900390625 N/A N/A
S1/SCstatus/SClatitude S1/SCstatus/SClatitude degrees float32 -9999.900390625 N/A N/A
S1/SCstatus/SClongitude S1/SCstatus/SClongitude degrees float32 -9999.900390625 N/A N/A
S1/SCstatus/SCorientation S1/SCstatus/SCorientation degrees int16 -9999 N/A N/A
S1/sunGlintAngle S1/sunGlintAngle degrees int8 -99 N/A N/A
S1/sunLocalTime S1/sunLocalTime hours float32 -9999.900390625 N/A N/A
S1/Tc S1/Tc K float32 -9999.900390625 N/A N/A
S2/incidenceAngle S2/incidenceAngle degrees float32 -9999.900390625 N/A N/A
S2/incidenceAngleIndex S2/incidenceAngleIndex N/A int8 -99 N/A N/A
S2/Latitude S2/Latitude degrees float32 -9999.900390625 N/A N/A
S2/Longitude S2/Longitude degrees float32 -9999.900390625 N/A N/A
S2/Quality S2/Quality N/A int8 -99 N/A N/A
S2/ScanTime/DayOfMonth S2/ScanTime/DayOfMonth days int8 -99 N/A N/A
S2/ScanTime/DayOfYear S2/ScanTime/DayOfYear days int16 -9999 N/A N/A
S2/ScanTime/Hour S2/ScanTime/Hour hours int8 -99 N/A N/A
S2/ScanTime/MilliSecond S2/ScanTime/MilliSecond ms int16 -9999 N/A N/A
S2/ScanTime/Minute S2/ScanTime/Minute minutes int8 -99 N/A N/A
S2/ScanTime/Month S2/ScanTime/Month months int8 -99 N/A N/A
S2/ScanTime/Second S2/ScanTime/Second s int8 -99 N/A N/A
S2/ScanTime/SecondOfDay S2/ScanTime/SecondOfDay s float64 -9999.9 N/A N/A
S2/ScanTime/Year S2/ScanTime/Year years int16 -9999 N/A N/A
S2/SCstatus/FractionalGranuleNumber S2/SCstatus/FractionalGranuleNumber N/A float64 -9999.9 N/A N/A
S2/SCstatus/SCaltitude S2/SCstatus/SCaltitude km float32 -9999.900390625 N/A N/A
S2/SCstatus/SClatitude S2/SCstatus/SClatitude degrees float32 -9999.900390625 N/A N/A
S2/SCstatus/SClongitude S2/SCstatus/SClongitude degrees float32 -9999.900390625 N/A N/A
S2/SCstatus/SCorientation S2/SCstatus/SCorientation degrees int16 -9999 N/A N/A
S2/sunGlintAngle S2/sunGlintAngle degrees int8 -99 N/A N/A
S2/sunLocalTime S2/sunLocalTime hours float32 -9999.900390625 N/A N/A
S2/Tc S2/Tc K float32 -9999.900390625 N/A N/A
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