2007
DOI: 10.1590/s0044-59672007000200014
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Análise derivativa de dados hiperespectrais medidos em nível de campo e orbital para caracterizar a composição de águas opticamente complexas na Amazônia

Abstract: Análise derivativa de dados hiperespectrais medidos em nível de campo e orbital para caracterizar a composição de águas opticamente complexas na Amazônia Conrado M. RUDORFF 1 , Evlyn M. L. M. NOVO 1 , Lênio S. GALVÃO 1 , Waterloo PEREIRA FILHO 2 RESUMO A técnica de análise derivativa de dados espectrais foi usada para estudar a variação dos constituintes opticamente ativos (COAs) na água, por meio de dados de campo e de imagens do sensor orbital Hyperion/EO-1. A imagem Hyperion usada neste estudo foi adquirida… Show more

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Cited by 27 publications
(30 citation statements)
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“…The objective of this work is to compile and organize a database and build a spectral library using field water reflectance spectra and limnological data collected by different researchers and campaigns in the Amazonian region (Barbosa 2005, Nóbrega 2005, Rudorff et al 2007). An iterative clustering procedure is developed and applied to define reference spectra representative of the major Amazonian water types based on the correspondence between their limnological and spectral reflectance attributes.…”
Section: Introductionmentioning
confidence: 99%
“…The objective of this work is to compile and organize a database and build a spectral library using field water reflectance spectra and limnological data collected by different researchers and campaigns in the Amazonian region (Barbosa 2005, Nóbrega 2005, Rudorff et al 2007). An iterative clustering procedure is developed and applied to define reference spectra representative of the major Amazonian water types based on the correspondence between their limnological and spectral reflectance attributes.…”
Section: Introductionmentioning
confidence: 99%
“…Hyperspectral imager sensors have the advantage of instantly composing images acquired in hundreds of spectra with a level of resolution closer to that obtained with field or laboratory spectroradiometer (RUDORFF et al, 2007). The Hyperion, which was launched aboard the Earth Observing One satellite (EO-1) in November 2000, is the first orbital hyperspectral sensor that allows the acquisition of images in 220 spectral bands (10 nm wide each), with a spatial resolution of 30 m. Covering the spectrum from 400 nm to 2,500 nm, the bands are positioned in the visible, near infrared and short wave infrared, allowing more precise analyses of the relationships between plant components and spectral bands.…”
Section: Introductionmentioning
confidence: 99%
“…The evaluation of the spectral profile can allow not only crop differentiation (TISOT et al, 2007), but also bring inferences about their conditions. At this point, the analysis of spectral profiles can identify differences in plants and provide important insights on the spatial distribution of postharvest damage, one of the critical steps of crop management.…”
Section: Introductionmentioning
confidence: 99%
“…O uso de Sensoriamento Remoto permite uma abordagem sinótica do problema visto que possibilitam não apenas identificar substâncias em suspensão na água como também, a partir da análise de séries temporais, determinar seu deslocamento ao longo do tempo (JENSEN, 2009;RUDORFF, 2007).…”
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