Along Track Scanning Radiometer - 1
|Within Vocab||SeaVoX Device Catalogue|
|Definition||A passive optical imager with dual view composed of a 4-channel infra-red radiometer and a 2-channel nadir-viewing microwave sounder, designed to measure sea surface temperature and cloud parameters. The infra-red radiometer uses an along-track scanning telescope to focus incoming radiation from two views at different angles: one at nadir and one fore-looking at approximately 47 degrees. The same point on the Earth's surface is thus observed twice through differing atmospheric thickness, allowing for direct estimation of the atmospheric effect as well as atmospheric correction for the surface dataset. The radiometer's bandwidths are (1.46 - 1.76)um, (3.55 - 3.85) um, (10.35 - 11.35) um, and (11.50 - 12.50)um; the microwave sounder's central frequencies are 23.8 GHz and 36.5 GHz, and have a bandwidth of 400 MHz. The instrument's resolutions at sub-satellite point are 1 km (infra-red radiometer) and 20 km (microwave sounder). The swath is 500 km. The accuracy of sea surface temperature measurements is approximately 0.3 degC. Flown on ERS-1. http://www.wmo-sat.info/oscar/instruments/view/55|
|Has Current Version||1|
|L05 SeaDataNet device categories - (2)|
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