Geostationary Operational Environmental Satellite Imager (8-11)
|Within Vocab||SeaVoX Device Catalogue|
|Alternative Labels||GOES IMAGER (8-11)|
|Definition||A five-channel imaging radiometer designed to measure radiant and solar reflected energy from sampled areas of the earth, with the primary mission of determining cloud cover and characteristics, as well as water vapour features and horizontal wind. The Imager's optical system collects scene radiance, which is then separated into spectral channels by beam splitters. One of the bands captures the Earth's reflected radiation in the visible part of the electro-magnetic spectrum; the other four bands sense the Earth's emitted or infrared energy. The spectral energy is then directed to different visible and infrared sets of detectors, and converted into an electrical signal by each detector. The signal goes through amplification, filtration and digitalization before being sent to a ground station through a sensor data transmitter. The Imager uses a Cassegrain telescope in conjunction with a servo-driven, two-axis gimbaled mirror scan system to simultaneously sweep an 8 km north-to south swath along an east-to-west/west-to-east path at a rate of 20 degrees per second. The Imager collects at five bands of radiation wavelengths: (0.55 - 0.75) um, which is the visible band and has a spatial resolution of 1 km; (3.80 - 4.00) um, (6.50 - 7.00) um, (10.2 - 11.2) um and (11.5 - 12.4) um, which are the infrared bands, and have a spatial resolution of 4 km. Flown on GOES-8, GOES-9, GOES-10, GOES-11, GOES-9 (GMS backup), GOES-10 (S-America). https://www.wmo-sat.info/oscar/instruments/view/217|
|Has Current Version||2|
||atmospheric radiometers||Mapping: 877876|
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