%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.23.19.37.17
%2 sid.inpe.br/marte2/2017/10.23.19.37.18
%@isbn 978-85-17-00088-1
%F 59237
%T Análise comparativa dos padrões de reflectância bidirecional em função da hora de aquisição das imagens
%D 2017
%A Breunig, Fabio Marcelo,
%A Bourscheidt, Vandoir,
%@electronicmailaddress fabiobreunig@gmail.com
%E Gherardi, Douglas Francisco Marcolino,
%E Aragão, Luiz Eduardo Oliveira e Cruz de,
%B Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)
%C Santos
%8 28-31 maio 2017
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 1447-1454
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X Wide field of view sensors allows to adequately timely monitoring forest and agricultural areas, and increase the probability to cloud free scenes. Thus, we are committed to evaluate the differences of bidirectional surface reflectance as a function of the acquisition hours. For that, we defined a study area comprising the Misiones region (Argentina) and the Parque Estadual do Turvo (Brazil). We used daily data from Moderate-Resolution Imaging Spectroradiometer (MODIS) aboard Terra and Aqua satellites (MOD09GA e MYD09GA). The MODIS products were processed using the Google Earth Engine. The original data were filtered to mask low quality and cloudy pixels throughout the period of 2000-2016. To evaluate the acquisition hour effect, only data acquired at nadir (±5° in the forward scattering and backscattering directions) were used. For each pixel, we calculated the series average for each MODIS band and derived the vegetation indices: NDVI and EVI. The results demonstrated that red band did not present clear differences between Terra and Aqua MODIS sensors reflectance. Conversely, the near infrared allowed monitoring the annual cycle of the forest and solar zenith variation. By contrasting the near infrared bands, a positive linear adjustment was obtained for Terra and Aqua. The red band did not present correlations. Considering the vegetation indices, the NDVI presented high dependence on red band. The EVI covariate more with the near infrared band as expected, and allowed to evaluate the annual dynamics of the forest.
%9 Monitoramento e modelagem ambiental
%@language pt
%3 59237.pdf