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Description
Version 08 is the current version of the data set. Older versions will no longer be available and have been superseded by Version 08.
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.
GMI geometric footprints are: 12x13.4 km (10.65 GHz), 6.0x13.4 km (18.7 GHz), 6.0x13.4 km (23.8 GHz), 6.0x13.4 km (36.5 GHz), 3.0x13.4 km (89 GHz), 3.0x13.4 km (166.5 GHz), 3.0x13.4 km (183.31GHz). GPM Project cross-calibrates all channels at spatial sampling: 6x13 km (cross-track x along-track at forward bore sight).
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
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.
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Berg, W. (2026). GPM GMI Common Calibrated Brightness Temperatures Collocated L1C 1.5 hours 13 km V08 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/GPM/GMI/GPM/1C/08 Date Accessed: 2026-05-01
Berg, Wesley. “GPM GMI Common Calibrated Brightness Temperatures Collocated L1C 1.5 Hours 13 Km V08.” NASA Goddard Earth Sciences Data and Information Services Center, 2026. doi:10.5067/GPM/GMI/GPM/1C/08. Date Accessed: 2026-05-01
Berg, Wesley. GPM GMI Common Calibrated Brightness Temperatures Collocated L1C 1.5 Hours 13 Km V08. NASA Goddard Earth Sciences Data and Information Services Center, 2026, doi:10.5067/GPM/GMI/GPM/1C/08. Date Accessed: 2026-05-01
Padulles, Ramon, Cardellach, Estel, Paz, Antia, Oliveras, Santi, Hunt, Douglas C., Sokolovskiy, Sergey, Weiss, Jan-Peter, Wang, Kuo-Nung, Turk, F. Joe, Ao, Chi O., de la Torre Juarez, Manuel
Atmospheric Water Vapor, Precipitation, Brightness Temperature, Precipitation Amount, Precipitation Rate, Snow, Rain, Brightness Temperature
Guilloteau, Clement, Foufoula-Georgiou, Efi, Kummerow, Christian D., Petkovic, Veljko
Atmospheric Water Vapor, Precipitation, Brightness Temperature, RADAR
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.