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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
20/02/2024 |
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Data da última atualização: |
20/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANO, E. E.; FERREIRA, L. G.; HUETE, A. R. |
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Afiliação: |
EDSON EYJI SANO, CPAC; LAERTE G. FERREIRA, UNIVERSIDADE FEDERAL DE GOIÁS; ALFREDO R. HUETE, UNIVERSITY OF ARIZONA. |
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Título: |
Synthetic aperture radar (L band) and optical vegetation indices for discriminating the brazilian savanna physiognomies: a comparative analysis. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Earth Interactions, v. 9, n. 15, 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
The all-weather capability, signal independence to the solar illumination angle, and response to 3D vegetation structures are the highlights of active radar systems for natural vegetation mapping and monitoring. How- ever, they may present significant soil background effects. This study adresses a comparative analysis of the performance of L-band synthetic aperture radar (SAR) data and optical vegetation indices (VIs) for discriminating the Brazilian cerrado physiognomies. The study area was the Brasilia National Park, Brazil, one of the test sites of the Large-Scale Biosphere–Atmosphere (LBA) experiment in Amazonia. Seasonal Japanese Earth Resources Satellite-1 (JERS-1) SAR backscatter coefficients (sigma°) were compared with two vegetation índices [normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI)] over the five most dominant cerrados’ physiognomies plus gallery forest. In contrast to the VIs, (sigma°) from dry and wet seasons did not change significantly, indicating primary response to vegetation structures. Discriminant analysis and analysis of variance (ANOVA) showed an overall higher performance of radar data. However, when both SAR and VIs are combined, the discrimination capability increased significantly, indicating that the fusion of the optical and radar backscatter observations provides overall improved classifications of the cerrado types. In addition, VIs showed good performance for monitoring the cerrado dynamics. |
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Thesagro: |
Análise Comparativa; Cerrado; Radar; Vegetação. |
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Thesaurus Nal: |
Savannas; Synthetic aperture radar; Vegetation index. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02189naa a2200229 a 4500
001 2162135
005 2024-02-20
008 2009 bl uuuu u00u1 u #d
100 1 $aSANO, E. E.
245 $aSynthetic aperture radar (L band) and optical vegetation indices for discriminating the brazilian savanna physiognomies$ba comparative analysis.$h[electronic resource]
260 $c2009
520 $aThe all-weather capability, signal independence to the solar illumination angle, and response to 3D vegetation structures are the highlights of active radar systems for natural vegetation mapping and monitoring. How- ever, they may present significant soil background effects. This study adresses a comparative analysis of the performance of L-band synthetic aperture radar (SAR) data and optical vegetation indices (VIs) for discriminating the Brazilian cerrado physiognomies. The study area was the Brasilia National Park, Brazil, one of the test sites of the Large-Scale Biosphere–Atmosphere (LBA) experiment in Amazonia. Seasonal Japanese Earth Resources Satellite-1 (JERS-1) SAR backscatter coefficients (sigma°) were compared with two vegetation índices [normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI)] over the five most dominant cerrados’ physiognomies plus gallery forest. In contrast to the VIs, (sigma°) from dry and wet seasons did not change significantly, indicating primary response to vegetation structures. Discriminant analysis and analysis of variance (ANOVA) showed an overall higher performance of radar data. However, when both SAR and VIs are combined, the discrimination capability increased significantly, indicating that the fusion of the optical and radar backscatter observations provides overall improved classifications of the cerrado types. In addition, VIs showed good performance for monitoring the cerrado dynamics.
650 $aSavannas
650 $aSynthetic aperture radar
650 $aVegetation index
650 $aAnálise Comparativa
650 $aCerrado
650 $aRadar
650 $aVegetação
700 1 $aFERREIRA, L. G.
700 1 $aHUETE, A. R.
773 $tEarth Interactions$gv. 9, n. 15, 2009.
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| Registros recuperados : 272 | |
| 29. |  | FRANÇA, A. M. S.; SANO, E. E.; SOUSA, A. O. Avaliação de fusão de imagens CBERS/2B no mapeamento de áreas úmidas do Distrito Federal. In: ENCONTRO DE JOVENS TALENTOS DA EMBRAPA CERRADOS, 4., 2009, Planaltina, DF. Resumos apresentados... Planaltina, DF: Embrapa Cerrados, 2009. p. 155-156 (Embrapa Cerrados. Documentos, 243).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Cerrados. |
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| 38. | | SANO, E. E.; GIAROLLA, A.; ADAMI, M.; JACKSON, T. J. Calibração da estimativa superficial de solos do Cerrado. In: ANDRADE, S. R. M. de; FALEIRO, F. G.; SERENO, J. R.; DALLA CORTE, J. L.; SOUSA, E. dos S. de (Ed.). Resultados de pesquisa para o Cerrado: 2004-2005. Planaltina, DF: Embrapa Cerrados, 2007. p. 79-82.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 272 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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