Advanced Microwave Sounding Unit - A
|Within Vocab||SeaVoX Device Catalogue|
|Preferred Label||Advanced Microwave Sounding Unit - A|
|Definition||A multi-channel microwave radiometer designed to measure global atmospheric temperature profiles in nearly all weather conditions. AMSU-A samples thirty consecutive scene radiances in a stepped-scan fashion every eight seconds, and measures the atmospheric temperature profile by examining fifteen bands of microwave radiation ranging between (23 - 90) GHz. The instrument consists of two independent modules with their own spacecraft interface: AMSU-A1 and AMSU-A2. AMSU-A2 identifies precipitation and corrects for surface emissivity, atmospheric liquid water and water vapour effects by processing the first two microwave radiation channels using one antenna. In AMSU-A1, two antenna-radiometer systems provide the other thirteen channels to retrieve atmospheric temperature profiles up to 42 km from the Earth's surface. The swath is 1690 km wide, and the spatial resolution is 40 km (horizontal) at nadir. The field of view is +/- 49.5 degrees cross-track, and the instantaneous field of view is 3.3 degrees circular. The thermal operating range is (0 - 20) degC. AMSU-A2 central channel frequencies are: (23.800, 31.400) GHz; AMSU-A1 central channel frequencies are: (50.300, 52.800, 53.596 +/- 0.115, 54.400, 54.940, 55.500, f0 = 57.290344, f0 +/- 0.217, f0 +/- 0.3222 +/- 0.048, f0 +/- 0.3222 +/- 0.022, f0 +/- 0.3222 +/- 0.010, f0 +/- 0.3222 +/- 0.0045, 89.0) GHz. Flown on Aqua, Metop-A, Metop-B, Metop-C, NOAA-15, NOAA-16, NOAA-17, NOAA-18, NOAA-19 . http://www.wmo-sat.info/oscar/instruments/view/30|
|Has Current Version||http://vocab.nerc.ac.uk/collection/L22/current/TOOL1067/1/|
|Authored On||2016-11-15 15:28:05|
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