CEOS Instrument: Advanced Microwave Sounding Unit-A




Instrument:AMSU-A
Agencies: NOAA [Primary]
 UKSA
Missions: NOAA-16
 NOAA-17
 NOAA-18
 NOAA-15
 Metop-B
 Metop-C
 Metop-A
Status:Operational
Type:Absorption-band MW radiometer/spectrometer
Description:All-weather night-day temperature sounding to an altitude of 45 km
Spatial Resolution: 48 km
Swath Width: 2054 km
Wavebands: Microwave: 15 channels, 23.8 - 89.0 GHz
Technology: Absorption-band MW radiometer/spectrometer
Description: Radiometers operating in bands of absorption from O2 (typical, ~ 54 GHz) and from H2O (typical: ~ 183 GHz) enable measuring the atmospheric temperature and humidity profiles in nearly-all-weather conditions. Cross-nadir scanning is utilised, though also conical scanners use to include channels in absorption bands. Radiometric accuracy is a driver for profiling, thus scanning speed must be relatively slow, that implies coarse resolution (typical, 50 km for 54 GHZ, 15 km for 183 GHz, horizontal; the vertical, referring to the product, is ~ 2 km). Applicable in LEO; however by adding higher frequencies (e.g. 118 and 425 GHz for O2 and 380 GHz for H2O) sounding is also possible from GEO.

Measurement List:

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CEOS Systems Engineering Office (SEO)

CEOS Data Base Version: 17 - Created: 2012-01-18