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dc.contributor.authorSANCHES, I. D. A.pt_BR
dc.contributor.authorANDRADE, R. G.pt_BR
dc.contributor.authorQUARTAROLI, C. F.pt_BR
dc.contributor.authorRODRIGUES, C. A. G.pt_BR
dc.date.accessioned2011-10-04T11:11:11Zpt_BR
dc.date.available2011-10-04T11:11:11Zpt_BR
dc.date.created2011-10-04pt_BR
dc.date.issued2011pt_BR
dc.identifier.citationIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE, 2011.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/902348pt_BR
dc.descriptionThe present study has compared three methods of atmospheric correction, two dark object subtraction (DOS) methods and one method based on the fourth component of the tasseled cap transformation (TC4), to obtain reflectance and NDVI values of Landsat 5 ? TM satellite images. For each atmospheric correction method, reflectance and NDVI values of five targets (crop/pasture, forest, straw, bare soil and water) were analyzed in three images (Landsat path-row 222-75). The study area is localized in the west of Sao Paulo State, Brazil. The images were acquired on 29/10/2009, 02/02/2010 and 26/06/2010 with solar zenith angles of 28°, 34° and 55°, correspondingly. The TC4 was the only method which eliminated the haze in the image, but it is not recommended if the objective is to obtain reflectance values. The DOS methods did not removed the image haze but performed reasonably to obtain reflectance values. For the visible bands, both DOS methods analyzed performed well. The DOS method which considered the atmospheric transmittance (DOS2), although more indicated to correct the infrared bands, it is dependent of the image solar zenith angle. The image acquired under a zenith angle of 55°, after been corrected using the DOS2 method, presented reflectance values overestimated. Without the atmospheric correction the NDVI of vegetation targets tended to be underestimated.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectSubtração do pixel escuropt_BR
dc.subjectTransformação tasseled cappt_BR
dc.subjectEstudos multitemporaispt_BR
dc.subjectÂngulo zenitalpt_BR
dc.titleAnálise comparativa de três métodos de correção atmosférica de imagens Landsat 5 - TM para obtenção de reflectância de superfície e NDVI.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2019-05-03T11:11:11Zpt_BR
dc.subject.thesagroSensoriamento Remotopt_BR
dc.format.extent2p. 7564-7571.pt_BR
riaa.ainfo.id902348pt_BR
riaa.ainfo.lastupdate2019-05-03 -03:00:00pt_BR
dc.contributor.institutionIEDA DEL'ARCO SANCHES, Bolsista/CNPM; RICARDO GUIMARAES ANDRADE, CNPM; CARLOS FERNANDO QUARTAROLI, CNPM; CRISTINA APARECIDA G RODRIGUES, CNPM.pt_BR
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