IASI : An advance sounder for operational meteorology
- Paper ID
IAF-01-B.3.10
- author
- company
Centre National d'Etudes Spatiales (CNES)
- country
France
- year
2001
- abstract
IASI is an infrared atmospheric sounder. It will provide meteorologist and scientific community with atmospheric spectra. The IASI system includes 3 instruments that will be mounted on the Metop satellite series, a data processing software integrated in the EPS (EUMETSAT Polar System) ground segment and a technical expertise centre implemented in CNES Toulouse. The instrument is composed of a Fourier transform spectrometer and an associated infrared imager. The optical configuration is based on a Michelson interferometer and the interferograms are processed by an on-board digital processing subsystem, which performs the inverse Fourier transforms and the radiometric calibration. The infrared imager coregisters the IASI soundings with AVHRR imager (AVHRR is another instrument on the Metop satellite). CNES is leading the IASI program in association with EUMETSAT and is supported by Météo-France for scientific aspects. This paper presents the IASI mission, an overview of the IASI system and a description of the instrument.