Journal Article

FZJ-2014-07027

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png New calibration noise suppression techniques for the GLORIA limb imager

Guggenmoser, T. (Corresponding Author)FZJ* ; Blank, J. ; Kleinert, A. ; Latzko, T. ; Ungermann, J.FZJ* ; Friedl-Vallon, F. ; Höpfner, M. ; Kaufmann, M.FZJ* ; Kretschmer, E. ; Maucher, G. ; Neubert, T.FZJ* ; Oelhaf, H. ; Preusse, P.FZJ* ; Riese, M.FZJ* ; Rongen, H.FZJ* ; K. Sha, M. ; Sumińska-Ebersoldt, O. ; Tan, V.FZJ*

2014
Copernicus Katlenburg-Lindau

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Please use a persistent id in citations: http://hdl.handle.net/2128/8184  doi:10.5194/amtd-7-12649-2014

Abstract: The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) presents new opportunities for the retrieval of trace gases in the upper troposphere and lower stratosphere. The radiometric calibration of the measured signal is achieved using in-flight measurements of reference blackbody and upward-pointing "deep space" scenes. In this paper, we present techniques developed specifically to calibrate GLORIA data exploiting the instrument's imaging capability. The algorithms discussed here make use of the spatial correlation of parameters across GLORIA's detector pixels in order to mitigate the noise levels and artefacts in the calibration measurements. This is achieved by combining a priori and empirical knowledge about the instrument background radiation with noise-mitigating compression methods, specifically low-pass filtering and principal component analysis. In addition, a new software package for the processing of GLORIA data is introduced which allows us to generate calibrated spectra from raw measurements in a semi-automated data processing chain.

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Contributing Institute(s):

1. Stratosphäre (IEK-7)

Research Program(s):

1. 234 - Composition and Dynamics of the Upper Troposphere and Stratosphere (POF2-234) (POF2-234)

Appears in the scientific report 2014

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