THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - GMI -
Full Name GPM Microwave Imager Status Operational
Instrument Agencies NASA Maturity
Instrument Type Imaging multi-spectral radiometers (passive microwave) Geometry Conical scanning
Instrument Technology Multi-purpose imaging MW radiometer Sampling Imaging
Data Access Open Access Data Format HDF-EOS(HDF5)
Measurements and Applications Measures rainfall rates over oceans and land, combined rainfall structure and surface rainfall rates with associated latent heating. Used to produce three hour, daily, and monthly total rainfall maps over oceans and land.
Resolution Summary Horizontal: 36 km cross-track at 10.65 GHz (required - Primary Spacecraft, goal - Constellation Spacecraft); 10 km along-track and cross-track (goal - Primary Spacecraft)
Swath Summary 800 km (Core Observatory
Accuracy Summary 0.65 - 1.5 K
Waveband Summary Microwave: 10.65 GHz, 18.7 GHz, 23.8 GHz, 36.5 GHz, 89.0 GHz, 165.5 GHz, 183.31 ± 3 GHz, 183.31 ± 8 GHz
MW (~1.0 cm - ~100 cm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (TC) 
Cloud particle properties and profileCloud liquid water (TC) 
Precipitation Profile (liquid or solid) 
Cloud ice (column/profile) 
Liquid water and precipitation ratePrecipitation rate (liquid) at the surface 
Ocean surface windsWind speed over sea surface (horizontal) 
Radiation budgetLong-wave Earth surface emissivity 
Soil moistureSoil moisture at the surface 
Surface temperature (ocean)Sea surface temperature 
Instrument Missions
GPM Core - Global Precipitation Measurement Mission Core spacecraft (2014 - 2017)
GPM Constellation - Global Precipitation Measurement Mission Constellation spacecraft (2014 - 2019)
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