Rôle des précipitations dans l'interaction ondes atmosphère dans la bande 10-50 GHz

Laurent Barthès 1
1 SPACE - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : In the troposphere, the microwave electromagnetic radiation interacts with matter according to three processes: absorption by gas molecules and water, scattering due to the deflection of the waves by hydrometeors, and the emission of a natural radiation. My work has a common basis for these processes of interaction of electromagnetic waves with the atmosphere, and relates to two distinct areas: Earth-satellite telecommunications and small scales studies of precipitations. I will present measurement campaigns and modeling works performed in relation with the development of new Fade Mitigation Techniques for Earth – satellite telecommunications. In this context I will show the interest to use rain microphysics properties to improve frequency scaling models. A model of short term prediction of rain attenuation level and its volatility in Earth-to-Satellite links will be also presented. This model uses a statistical model based on GARCH model which is able to well represents periods of high volatility and is particular well designed to model rain variability. Finally, multifractal properties of rain will be presented within the framework of universal multifractals.
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Habilitation à diriger des recherches
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Laurent Barthès. Rôle des précipitations dans l'interaction ondes atmosphère dans la bande 10-50 GHz . Météorologie. Université Versailles Saint Quentin en Yvelines, 2010. ⟨tel-01591115⟩

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