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Exploitation of Electromagnetic Models for Sea Wind Speed Estimation from C-Band Sentinel-1 Images

Tran Vu La 1, 2 Ali Khenchaf 1, 2 Fabrice Comblet 1, 2 Carole Nahum 3 Helmi Ghanmi 1, 2
1 Lab-STICC_ENSTAB_MOM_PIM
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
2 Pôle STIC_REMS
ENSTA Bretagne - École Nationale Supérieure de Techniques Avancées Bretagne
Abstract : Among the different available wind sources, i.e. in situ measurements, numeric weather models, the retrieval of wind speed from Synthetic Aperture Radar (SAR) data is one of the most widely used methods, since it can give high wind resolution cells. For this purpose, one can find two principal approaches: via electromagnetic (EM) models and empirical (EP) models. In both approaches, the Geophysical Model Functions (GMFs) are used to describe the relation of radar scattering, wind speed, and the geometry of observations. By knowing radar scattering and geometric parameters, it is possible to invert the GMFs to retrieve wind speed. It is very interesting to compare wind speed estimated by the EM models, general descriptions of radar scattering from sea surface, to the one estimated by the EP models, specific descriptions for the inverse problem. Based on the comparisons, some ideas are proposed to improve the performance of the EM models for wind speed retrieval.
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https://hal.archives-ouvertes.fr/hal-01326437
Contributeur : Annick Billon-Coat <>
Soumis le : vendredi 3 juin 2016 - 15:38:10
Dernière modification le : mercredi 24 juin 2020 - 16:19:51

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Tran Vu La, Ali Khenchaf, Fabrice Comblet, Carole Nahum, Helmi Ghanmi. Exploitation of Electromagnetic Models for Sea Wind Speed Estimation from C-Band Sentinel-1 Images. International Journal of Electromagnetics and Applications, 2016, 8 (3), pp.42-55. ⟨10.4236/jemaa.2016.83005⟩. ⟨hal-01326437⟩

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