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Master Thesis

Analyse spatio-temporelle de la vapeur d’eau dans la troposphère par GNSS par tomographie

Abstract : Nowadays, the development of Global Navigation Satellite System enables to estimate the tropospheric parameters for meteorological purposes.They become the alternative solution to reproduce the 3D water vapor field. Actually, this restitution was, until now, done with the Global Positionning System (GPS) alone. This dissertation tackles the adjustment of the whole process to the GLONASS's constellation. To do so, two softwares are useful: GAMIT, which devises the calculation of the station's positions and the estimate of the troposphere's parameters and TSAAR which purpose is the reproduction of this 3D steam field. The adjustment of the tomographic software TSAAR now authorizes to get multi-constellation's tomographic results. These results have been compared to those we got from the GPS constellation alone. Finest variations have been observed with a multi-GNSS calculation, depending on the alpha coefficient value. Another study between the ZWD got from the GLONASS and GPS's constellations has been realized just like a statiscal study, reporting the difference between the two calculations' patterns.Last but not least, the conditionning of the system has been tested in order to appreciate the GLONASS benefices to the resolution of the tomographic opposite system.
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Master Thesis
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Damien Berges. Analyse spatio-temporelle de la vapeur d’eau dans la troposphère par GNSS par tomographie. Sciences de l'ingénieur [physics]. 2019. ⟨dumas-02440805⟩



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