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 (~0.1 cm - ~100 cm)
Instrument Measurements
Measurements Overview
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 intensity at the surface (liquid or solid)
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
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Cloud Properties click here click here search ECV Inventory records
Precipitation click here click here search ECV Inventory records
Sea Surface Temperature click here click here search ECV Inventory records
Soil Moisture click here click here search ECV Inventory records
Water Vapour (upper air) click here click here search ECV Inventory records
Instrument Missions
GPM Constellation - Global Precipitation Measurement Mission Constellation spacecraft (2014 - 2019)
GPM Core - Global Precipitation Measurement Mission Core spacecraft (2014 - 2026)