Abstract

I.A.S.I (Infrared Atmospheric Sunding Interferometer), developed by the CNES (French Spatial Agency), will be the major intrument of the european meteorological METOP satellites. The optical part of this instrument is mainly composed of a Fourier spectrometer, followed by a three channel infrared detection device (cold box), as shown in figure 1. The spectral range of this instrument extends from 3.62 µm up to 15.5 µm. Two dichoïc filters, placed in the cold box, permit to divide this spectrum in three channels, B1, B2 and B3. A 1.54 µm laser beam serves as wavelength reference in the interferometer.

© 1998 Optical Society of America