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	Provedor de dados ArchiMer (2) Autor Balashova, E.a. (1) Chapron, Bertrand (1) Mouche, Alexis (1) Ren, Lin (1) Wang, He (1) Wang, Juan (1) Yang, Jingsong (1) Zabolotskikh, E.v. (1) Zhang, Huaguo (1) Zheng, Gang (1) Mais... Palavra-chave Polarization difference (2) AMSR2 (1) Arctic (1) Brightness temperatures (1) Gaofen-3 (1) Geophysical model function (1) Noise equivalent sigma zero (1) Ocean surface wind (1) Physical modeling (1) Polarization ratio (1) Quad-polarization (1) Satellite passive microwave radiometers (1) Sea ice (1) Sea ice concentration (1) Synthetic aperture radar (1) Mais... Tipo do documento Text (2) Ano 2019 (1) 2017 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Preliminary Analysis of Chinese GF-3 SAR Quad-Polarization Measurements to Extract Winds in Each Polarization ArchiMer Ren, Lin; Yang, Jingsong; Mouche, Alexis; Wang, He; Wang, Juan; Zheng, Gang; Zhang, Huaguo. This study analyzed the noise equivalent sigma zero (NESZ) and ocean wind sensitivity for Chinese C-band Gaofen-3 (GF-3) quad-polarization synthetic aperture radar (SAR) measurements to facilitate further operational wind extraction from GF-3 data. Data from the GF-3 quad-polarization SAR and collocated winds from both NOAA/NCEP Global Forecast System (GFS) atmospheric model and National Data Buoy Center (NDBC) buoys were used in the analysis. For NESZ, the co-polarization was slightly higher compared to the cross-polarization. Regarding co-polarization and cross-polarization, NESZ was close to RadarSAT-2 and Sentinel-1 A. Wind sensitivity was analyzed by evaluating the dependence on winds in terms of normalized radar cross-sections (NRCS) and polarization... Tipo: Text Palavras-chave: Gaofen-3; Synthetic aperture radar; Quad-polarization; Ocean surface wind; Noise equivalent sigma zero; Geophysical model function; Polarization ratio; Polarization difference. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00420/53104/54059.pdf Advanced method for sea ice concentration retrieval from satellite microwave radiometer measurements at frequencies near 90 GHz ArchiMer Zabolotskikh, E.v.; Balashova, E.a.; Chapron, Bertrand. An advanced method for sea ice concentration retrieval from satellite microwave radiometer measurements at frequencies near 90 GHz is presented. The method is based on the new approach for the determination of the tie points ― the polarization differences (PD) of the brightness temperatures (TB) of the ocean-atmosphere system (PDW) and the sea ice-atmosphere system microwave radiation (PDSI). The approach is based on the results of physical modeling of the sea ice – ocean – atmosphere TB and the analysis of the measurements of the Advanced Microwave Scanning Radiometer 2 (AMSR2) in the Arctic region. The TB simulation is carried out for the whole ranges of the Arctic atmospheric conditions and sea ice and ocean parameters. The method of sea ice... Tipo: Text Palavras-chave: Sea ice; Sea ice concentration; Arctic; Satellite passive microwave radiometers; Brightness temperatures; AMSR2; Polarization difference; Physical modeling. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00660/77194/78613.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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