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	Provedor de dados ArchiMer (2) Autor Caudal, G (1) Chapron, Bertrand (1) Dulov, V. A. (1) Guerin, C.a. (1) Hauser, D (1) Hauser, D. (1) Kudryavtsev, V (1) Mironov, Alexey (1) Yurovskaya, M. V. (1) Mais... Palavra-chave Short wind waves (2) Bragg scattering (1) Non Bragg scattering (1) Ocean field study (1) Ocean surface waves (1) Radar backscattering modeling (1) Radar cross section (1) Remote sensing (1) Sea surface (1) Stereo photography (1) Wave breaking (1) Mais... Tipo do documento Text (2) Ano 2012 (1) 2003 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última 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 Statistical characterization of short wind waves from stereo images of the sea surface ArchiMer Mironov, Alexey; Yurovskaya, M. V.; Dulov, V. A.; Hauser, D.; Guerin, C.a.. We propose a methodology to extract short-scale statistical characteristics of the sea surface topography by means of stereo image reconstruction. The possibilities and limitations of the technique are discussed and tested on a data set acquired from an oceanographic platform at the Black Sea. A validation is made with simultaneous in situ measurements as well as results from the literature. We show that one- and two-point properties of the short-scale roughness can be well estimated without resorting to an interpolation procedure or an underlying surface model. We obtain the first cumulants of the probability distribution of small-scale elevations and slopes as well as related structure functions. We derive an empirical parametrization for the skewness... Tipo: Text Palavras-chave: Ocean field study; Radar backscattering modeling; Remote sensing; Sea surface; Short wind waves; Stereo photography. Ano: 2012 URL: http://archimer.ifremer.fr/doc/00114/22511/20194.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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