THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - AMSU-A -
Full Name Advanced Microwave Sounding Unit-A Status Operational
Instrument Agencies NASA Maturity High Heritage - Operational
Instrument Type Atmospheric temperature and humidity sounders Geometry Cross-track scanning
Instrument Technology Absorption-band MW radiometer/spectrometer Sampling Sounding
Data Access Open Access Data Format HDF-EOS
Measurements and Applications All-weather night-day temperature sounding to an altitude of 45 km.
Resolution Summary 48 km
Swath Summary 2054 km
Accuracy Summary Temperature profile: 2 K, humidity: 3 kg/m2, ice & snow cover: 10%
Waveband Summary Microwave: 15 channels, 23.8 - 89.0 GHz
MW (~1.0 cm - ~100 cm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (column/profile) 
Atmospheric Temperature FieldsAtmospheric temperature (column/profile) 
Height of tropopause 
Temperature of tropopause 
Cloud particle properties and profileCloud liquid water (column/profile) 
Cloud type, amount and cloud top temperatureCloud type 
Liquid water and precipitation ratePrecipitation rate (liquid) at the surface 
Ocean surface windsWind speed over sea surface (horizontal) 
Radiation budgetLong-wave Earth surface emissivity 
Sea ice cover, edge and thicknessSea-ice cover 
Snow cover, edge and depthSnow cover 
Snow water equivalent 
Soil moistureSoil moisture at the surface 
Surface temperature (land)Land surface temperature 
Instrument Missions
Aqua - Aqua (formerly EOS PM-1) (2002 - 2019)
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