Infrared Atmospheric Sounding Interferometer
|Within Vocab||SeaVoX Device Catalogue|
|Definition||A cross-nadir, hyperspectral infrared sounder, designed to measure temperature, humidity, ozone profile and total-column reactive trace gases and greenhouse gases in the troposphere and lower stratosphere. The observations retrieved by the IASI instrument are primarily used to support numerical weather prediction. Measurements are carried out by an infrared imager and a calibrated Fourier Transform Spectrometer for passive infrared remote-sensing. A Michelson interferometer with 8461 channels is used for the optical configuration of the sounder. The spectrometer operates in the (3.6 - 15.5) um spectral range, equivalent to (645 - 2760) cm^-1; the spectral resolution is 0.25 cm^-1. The imager operates in the (10.3 - 12.5) um spectral range. The swath width is approximately 2130 km. Cross-track scans consist of 30 steps of 48 km at sub-satellite point, whilst along-track scans cover one line of 48 km every 8 seconds. The horizontal resolution is 4 by 12 km near the centre of a (48 by 48) km^2 cell, whilst the vertical resolution in the lower troposphere is 1 km. Flown on Metop-A, Metop-B, Metop-C. http://www.wmo-sat.info/oscar/instruments/view/207|
|Has Current Version||1|
||atmospheric radiometers||Mapping: 880107|
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