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	Provedor de dados ArchiMer (2) Autor Chapron, Bertrand (2) Caudal, G (1) Fan, Shengren (1) Hauser, D (1) Kudryavtsev, V (1) Kudryavtsev, Vladimir (1) Mouche, Alexis (1) Perrie, William (1) Zhang, Biao (1) Mais... Palavra-chave Bragg scattering (2) Breaking waves (1) Non Bragg scattering (1) Ocean surface current (1) Ocean surface waves (1) Polarization decomposition (1) Quad-polarized SAR (1) Radar cross section (1) Short wind waves (1) Wave breaking (1) Mais... Tipo do documento Text (2) Ano 2019 (1) 2003 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última On C-Band Quad-Polarized Synthetic Aperture Radar Properties of Ocean Surface Currents ArchiMer Fan, Shengren; Kudryavtsev, Vladimir; Zhang, Biao; Perrie, William; Chapron, Bertrand; Mouche, Alexis. We present new results for ocean surface current signatures in dual co- and cross-polarized synthetic aperture radar (SAR) images. C-band RADARSAT-2 quad-polarized SAR ocean scenes are decomposed into resonant Bragg scattering from regular (non-breaking) surface waves and scattering from breaking waves. Surface current signatures in dual co- and cross-polarized SAR images are confirmed to be governed by the modulations due to wave breaking. Due to their small relaxation scale, short Bragg waves are almost insensitive to surface currents. Remarkably, the contrast in sensitivity of the non-polarized contribution to dual co-polarized signals is found to largely exceed, by a factor of about 3, the contrast in sensitivity of the corresponding cross-polarized... Tipo: Text Palavras-chave: Quad-polarized SAR; Ocean surface current; Polarization decomposition; Bragg scattering; Breaking waves. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00588/70030/67948.pdf A semiempirical model of the normalized radar cross-section of the sea surface - 1. Background model ArchiMer Kudryavtsev, V; Hauser, D; Caudal, G; Chapron, Bertrand. Multiscale composite models based on the Bragg theory are widely used to study the normalized radar cross-section (NRCS) over the sea surface. However, these models are not able to correctly reproduce the NRCS in all configurations and wind wave conditions. We have developed a physical model that takes into account, not only the Bragg mechanism, but also the non-Bragg scattering mechanism associated with wave breaking. A single model was built to explain on the same physical basis both the background behavior of the NRCS and the wave radar Modulation Transfer Function (MTF) at HH and VV polarization. The NRCS is assumed to be the sum of a Bragg part (two-scale model) and of a non-Bragg part. The description of the sea surface is based on the short wind... Tipo: Text Palavras-chave: Ocean surface waves; Radar cross section; Short wind waves; Wave breaking; Bragg scattering; Non Bragg scattering. Ano: 2003 URL: https://archimer.ifremer.fr/doc/00000/10182/9580.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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