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Communication dans un congrès

Sensitivity of sea wind direction retrieval from sentienl-1 data with regard to spatial resolution and speckle noise

Ali Khenchaf 1, 2 Carole Nahum 3 Fabrice Comblet 1, 2 Tran Vu La 1, 2
1 Pôle STIC_REMS
ENSTA Bretagne - École Nationale Supérieure de Techniques Avancées Bretagne
2 Lab-STICC_ENSTAB_MOM_PIM
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : Retrieval of sea surface wind speed from Synthetic Aperture Radar (SAR) data is one of the most widely used methods, since it can give higher resolutions than the other available surface wind sources. For this approach, two principal methods can be found: one is based on electromagnetic (EM) models and the other is based on empirical (EP) ones. In both indicated ways, the Geophysical Model Functions (GMFs) are used to describe the dependency of radar scattering on wind speed and the geometry of observations. By knowing radar scattering and geometric parameters from SAR data, it is possible to invert the GMFs to retrieve sea wind speed. Wind speed estimated by two studied models is compared together and evaluated with measured data. Based on the comparisons, the advantages and limits of the studied models are analyzed and discussed.
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https://hal.archives-ouvertes.fr/hal-01653335
Contributeur : Annick Billon-Coat <>
Soumis le : vendredi 1 décembre 2017 - 12:25:37
Dernière modification le : mercredi 24 juin 2020 - 16:19:51

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  • HAL Id : hal-01653335, version 1

Citation

Ali Khenchaf, Carole Nahum, Fabrice Comblet, Tran Vu La. Sensitivity of sea wind direction retrieval from sentienl-1 data with regard to spatial resolution and speckle noise. IGARSS 2016, Jul 2016, Beijing, China. ⟨hal-01653335⟩

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