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Unidade da Embrapa/Coleção:: Área de Informação da Sede - Artigo em periódico indexado (ALICE)
Data do documento: 4-Set-2001
Tipo do Material: Artigo em periódico indexado (ALICE)
Autoria: FORMAGGIO, A. R.
SIMOES, M. dos S.
Título: Radarsat backscattering from an agricultural scene.
Edição: 2001
Fonte/Imprenta: Pesquisa Agropecuaria Brasileira, Brasilia, v.36, n.5, p.823-30, maio, 2001.
Idioma: en
Palavras-chave: Farmland
Terras agricolas.
Conteúdo: Orbital remote sensing in the microwave electromagnetic region has been presented as an important tool for agriculture monitoring. The satellite systems in operation have almost all-weather capability and high spatial resolution, which are features appropriated for agriculture. However, for full exploration of these data, an understanding of the relationships between the characteristics of each system and agricultural targets is necessary. This paper describes the behavior of backscattering coefficient (so) derived from calibrated data of Radarsat images from an agricultural area. It is shown that in a dispersion diagram of so there are three main regions in which most of the fields can be classified. The first one is characterized by low backscattering values, with pastures and bare soils; the second one has intermediate backscattering coefficients and comprises well grown crops mainly; and a third one, with high backscattering coefficients, in which there are fields with strong structures causing a kind of double bounce effect. The results of this research indicate that the use of Radarsat images is optimized when a multitemporal analysis is done making the best use of the agricultural calendar and of the dynamics of different cultures.
Thesagro: Radar
Sensoriamento Remoto
Uso da Terra.
NAL Thesaurus: land use
remote sensing.
Ano de Publicação: 2001
Aparece nas coleções:Artigo em periódico indexado (AI-SEDE) / Embrapa Informação Tecnológica (SCT)

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