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18 September 1997 Calibration approach for SCIAMACHY
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SCIAMACHY is one of the payloads for the ENVISAT satellite of the European Space Agency ESA. The instrument is a German-Dutch co-production. The launch of ENVISAT is foreseen in 1999. SCIAMACHY is an atmospheric chemistry instrument with wavelength coverage from 240 nm up to 2.4 micrometer and allows nadir viewing, limb viewing, solar occultation and observation of solar reference spectra over an onboard diffuser. The instrument uses eight linear array detectors with 1024 pixels, each, yielding a spectral simultaneity factor of more than 8000, spanning a large wavelength range from UV to NIR. The instrument has a two- mirror scan system, allowing nadir and limb scans. The instrument has different optical efficiencies for different polarization orientations of incoming radiation. An onboard Polarization Monitoring Device is used to monitor the polarization state of the incoming radiation so that the observed instrument output can be corrected for polarization effects. Accurate pre-flight and in-flight calibration of SCIAMACHY is essential for the observational objectives of the instrument, and a vacuum facility with external optical stimulators has been developed in order to allow the instrument to be calibrated under representative environmental conditions.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anne Erik Zoutman and Carina Olij "Calibration approach for SCIAMACHY", Proc. SPIE 3117, Earth Observing Systems II, (18 September 1997);

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