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Balloon-borne Limb profiling of UV/vis skylight radiances, O3, NO2 and BrO: technical set-up and validation of the method

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Author(s): F. Weidner | H. Bösch | H. Bovensmann | J. P. Burrows | A. Butz | C. Camy-Peyret | M. Dorf | K. Gerilowski | W. Gurlit | U. Platt | C. von Friedeburg | T. Wagner | K. Pfeilsticker

Journal: Atmospheric Chemistry and Physics Discussions
ISSN 1680-7367

Volume: 4;
Issue: 6;
Start page: 7631;
Date: 2004;
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ABSTRACT
A novel light-weight, elevation scanning and absolutely calibrated UV/vis spectrometer and its application to balloon-borne Limb radiance and trace gas measurements is described. Its performance and the novel method of balloon-borne UV/vis Limb trace gas measurements has been tested against simultaneous observations of the same atmospheric parameters available from either (a) in-situ instrumentation (cf., by an electrochemical cell (ECC) ozone sonde also deployed aboard the gondola) or (b) trace gas profiles from inferred UV/vis/near IR solar occultation measurements performed on the same payload. The novel technique is also cross validated with radiative transfer modelling. Reasonable agreement is found (a) between measured and simulated Limb radiances and (b) inferred Limb O3, NO2 and BrO and otherwise measured profiles when properly accounting for all relevant atmospheric parameters (temperature T, pressure P, aerosol extinction, and major absorbers).
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