The major revision of the operational SCIAMACHY Level 1b-2 Off-line data processor
Von Bargen, A.
Van Roozendael, M.
Nonbibliographic retrieval systems
DRACULA retrieval package
Nadir backscattered light
Off line processing
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Recently, the operational data processor chain for SCIAMACHY from Level 0 to Level 2 was subject to major revisions in each part including not only the Level 0-1b and Level 1b-2 data processing but also the IECF. In this contribution, we present the revisions and upgrades of the algorithms for the Level 1b-2 Off-line processing which had been applied to the derivation of products for Nadir and Limb back-scattered light observations as well. The results will be discussed briefly. In particular, the derivation of products from Nadir back-scattered light observations in the UV/VIS spectral region has been established by integration of most recently developments of state-of-the-art algorithms: The SDOAS algorithm of BIRA-IASB for the retrieval of column densities and the SACURA algorithm for the derivation of cloud-top height and cloud optical thickness based on cloud fraction provided by the DLR-IMF's OCRA algorithm. The combination of all three provides now the vertical column densities for Ozone and NO2. It is worth to note, that the product list for cloud parameters is now substantially extended due to SACURA. The derivation of Ozone and NO2 profiles from Limb back-scattered has been substituted by DLR-IMF's DRACULA retrieval package. Those in combination with optimised settings provide substantial improvements in profile information which are in very good agreement with scientific implementations of IFE Bremen. Additionally we present an overview about developments for future implementations. Beside an evolution scheme for the future, this holds for the evolution of the DRACULA package and for the retrieval of BrO profiles from Limb observations.
CitationVon Bargen, A.; Kretschel, K.; Doicu, A.; Hess, M.; Hilgers, S.; Schreier, F.; Schröder, T.; Lerot, C.; Van Roozendael, M.; Vountas, M.; Kokhanovsky, A.; Lotz, W.; Bovensmann, H. (2006). The major revision of the operational SCIAMACHY Level 1b-2 Off-line data processor. , Proceedings of the First Atmospheric Science Conference, Issue 628,