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Conference Papers Year : 2017

A new method to analyze UV stellar occultation data

Abstract

SPICAV stellar occultation measurements in the UV composed a huge dataset concerning vertical distributions of CO2, SO2 and O3 abundances on the night side of Venus mesosphere (80-130 km). Beside those absorption features the instrument was also sensitive to emissions from different extended sources in addition to a star light in spectral range from 110 to 320 nm. These emissions, hereafter «stray light», result in systematic errors when retrieving gaseous abundances from transmission spectra. In this paper we present a new method of data processing and a classification of different types of stray light at SPICAV UV stellar occultations. The method was developed on a basis of Richardson- Lucy algorithm including: (a) deconvolution process of measured star light and (b) separation of extra emissions registered by the spectrometer.
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Dates and versions

insu-04613079 , version 1 (15-06-2024)

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Daria Evdokimova, Lucio Baggio, Franck Montmessin, Denis Belyaev, Jean-Loup Bertaux. A new method to analyze UV stellar occultation data. European Planetary Science Congress 2017, Sep 2017, RIGA, Latvia. pp.EPSC2017-962-1. ⟨insu-04613079⟩
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