Full Name TRMM Microwave Imager Status No longer operational
Instrument Agencies NASA Maturity
Instrument Type Imaging multi-spectral radiometers (passive microwave) Geometry
Instrument Technology Multi-purpose imaging MW radiometer Sampling Imaging
Data Access Open Access Data Format HDF
Measurements and Applications Measures rainfall rates over oceans (less reliable over land), combined rainfall structure and surface rainfall rates with associated latent heating. Used to produce monthly total rainfall maps over oceans.
Resolution Summary Vertical: 2.5 km approx; Horizontal: 18 km
Swath Summary 790 km
Accuracy Summary Liquid water: 3 mg/cm3, Humidity: 3 mg/cm3, Ocean wind speed: 1.5 m/s
Waveband Summary Microwave: 10.7 GHz, 19.4 GHz, 21.3 GHz, 37 GHz, and 85.5 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)
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 Record ID: 10381
Precipitation click here click here Record ID: 11856
Record ID: 11839
Record ID: 10440
Record ID: 10321
Sea Surface Temperature click here click here search ECV Inventory records
Soil Moisture click here click here Record ID: 12050
Record ID: 12049
Record ID: 12048
Record ID: 12047
Record ID: 12046
find more ECV Inventory records
Water Vapour (upper air) click here click here Record ID: 11840
Record ID: 10380
Instrument Missions
TRMM - Tropical Rainfall Measuring Mission (1997 - 2015)