Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (2) Autor Chapron, Bertrand (2) Mouche, Alexis (2) Park, Kyung-ae (2) Jang, Jae-cheol (1) Kim, Tae-sung (1) Lee, Ji-hyun (1) Lee, Moonjin (1) Li, Xiaofeng (1) Mais... Palavra-chave C-band model (CMOD) functions (1) Full-polarization synthetic aperture radar (SAR) (1) Sea surface temperature (SST) front (1) Sea surface wind field (1) Sentinel-1A/B (1) Stability-effect (1) Synthetic aperture radar (SAR) (1) Wind direction (1) Wind speed (1) Wind speed error (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 Validation of Sea Surface Wind From Sentinel-1A/B SAR Data in the Coastal Regions of the Korean Peninsula ArchiMer Jang, Jae-cheol; Park, Kyung-ae; Mouche, Alexis; Chapron, Bertrand; Lee, Ji-hyun. In this study, using in situ measurements at 17 buoy stations off the Korean Peninsula, C-band model (CMOD) functions for Sentinel-1A/B IW mode synthetic aperture radar (SAR) data were validated. In total, 395 Sentinel-1A/B IW mode dual-vertical polarized images were used for collocation with in situ measurements from May 1, 2015, to September 30, 2017, and 807 matchup points were obtained. Prior to the validation, preprocessing such as speckle noise reduction and ship and land masking was completed. The in situ wind speeds were converted to a 10-m neutral wind considering atmospheric stability. High-resolution wind speeds were estimated by using the CMOD functions such as CMOD4, CMOD_IFR2, CMOD5, CMOD5.N, and CMOD5.Na. The root-mean-square errors of... Tipo: Text Palavras-chave: C-band model (CMOD) functions; Synthetic aperture radar (SAR); Sentinel-1A/B; Wind speed; Wind speed error. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62395/66792.pdf Observation of Wind Direction Change on the Sea Surface Temperature Front Using High-Resolution Full Polarimetric SAR Data ArchiMer Kim, Tae-sung; Park, Kyung-ae; Li, Xiaofeng; Mouche, Alexis; Chapron, Bertrand; Lee, Moonjin. In this study, we derive high-resolution wind speeds and directions from full-polarization synthetic aperture radar (SAR) data. Previous wind retrieval result from conventional single-polarization SAR data has a limitation to resolve small-scale structures in the surface wind because external wind direction data with coarser spatial resolution than those of SARs have been commonly used as an input. Using fully polarimetric SAR data, however, both wind speed and direction can be derived with high resolution from the image itself without any ancillary data. We derive wind field off the southern coast of Korea from the Radarsat-2 quad-polarization data and investigate the spatial variation. The retrieved wind field from the Radarsat-2 image presents a... Tipo: Text Palavras-chave: Full-polarization synthetic aperture radar (SAR); Sea surface temperature (SST) front; Sea surface wind field; Stability-effect; Wind direction. Ano: 2017 URL: http://archimer.ifremer.fr/doc/00374/48485/48786.pdf Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco