A new method to analyze UV stellar occultation data
Résumé
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.
Domaines
Planète et Univers [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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