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Etude du rayonnement diurne émis à 557,7 nm et 630,0 nm par l'atome d'oxygène
dans la thermosphère de la Terre : analyse de données satellite et modélisation numérique

Abstract : The main goal of this thesis is to analyse the diurnal airglow which appears in the
Earth's thermosphere, and more specifically the atomic oxygen emissions (green line at 557.7
nm and red line at 630.0 nm). This study involves a statistical analysis of the measurements of the
WINDII interferometer, which allows to quantify the influence of the solar flux and magnetic activity on this airglow.
It appears that the intensity and altitude of both emissions increase quasi-linearly
with solar flux. It is also shown that when magnetic activity increases, the intensity of
the 557.7 nm thermospheric peak decreases, and the red line intensity is almost constant.
This study also allowed to reproduce qualitatively and quantitatively those statistical results in using
the TRANSCAR ionosphere model, which proves that the involved physical phenomenon are well understood.
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Contributor : Frédéric Culot <>
Submitted on : Sunday, April 16, 2006 - 12:23:53 PM
Last modification on : Friday, November 6, 2020 - 3:47:08 AM
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Frédéric Culot. Etude du rayonnement diurne émis à 557,7 nm et 630,0 nm par l'atome d'oxygène
dans la thermosphère de la Terre : analyse de données satellite et modélisation numérique. Astrophysique [astro-ph]. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00012149⟩

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