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UP: Umweltphysik

UP 12: Poster: Satelliten und Anwendungen

UP 12.9: Poster

Dienstag, 23. März 2004, 14:00–16:00, Schellingstr. 3

Occultation Measurements with SCIAMACHY: First Results and Validation — •Leonard Amekudzi, Bettina Hoffmann, Jerome Meyer, Alexei Rozanov, Heinrich Bovensmann und John P. Burrows — Institut für Umweltphysik - Universität Bremen

SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) has successfully been launched onboard ENVISAT (ENVIronmental SATellite) in March 2002. It measures scattered, reflected, and direct radiation in the UV-Vis-IR range in three different viewing geometries (nadir, limb, and solar/lunar occultation). The focus of this presentation is on first solar and lunar occultation results. Height resolved concentration profiles of O₃ and NO₂ are derived from the occultation data as a standard product. First validations for these species have been carried out successfully. Furthermore, first vertical concentration profiles of NO₃ have been retrieved from lunar occultation measurements and will be presented. The retrieval algorithm is based on the optimal estimation method. It is specialised on the spectral fitting of differential structures of radiation transmitted through the atmosphere.