%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.27.13.57.13
%2 sid.inpe.br/marte2/2017/10.27.13.57.14
%@isbn 978-85-17-00088-1
%F 60007
%T Correções atmosféricas de imagens OLI Landsat 8 com dados visibilidade horizontal de campo e de aeroporto
%D 2017
%A Bolpato, Isadora Ferreira,
%A Antunes, Mauro Antonio Homem,
%@electronicmailaddress isadora.bolpato@hotmail.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 4851-4858
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X The accurate use of satellite images for mapping and environmental monitoring requires the image transformation to ground reflectance through atmospheric correction. The most difficult parameter to obtain for the atmospheric correction is the horizontal visibility. The objective of this paper is to present the comparison of atmospheric correction of OLI Landsat 8 images using horizontal visibility from field inspection and from airport data. OLI images were acquired from three dates, 02/26/2014, 02/10/2014, 10/11/2015 and 04/20/2016 and field work was conducted at the same time of satellite overpass and horizontal visibility was obtained by observing target at different distances and recording the maximum distance at which targets could be identifiable by visual inspection. Horizontal visibility was also downloaded from the Galeão airport data, to which the obtained values were 10km as this is the maximum value recorded for this airport. Atmospheric correction was carried out for the two sources of horizontal visibility using the Atmcor4OLI program, adapted through the 6S code. The comparison between the two methods was through graphs of surface and apparent reflectance for typical targets and by a statistic test. The results show that the atmospheric correction is necessary to analyze the spectral response of the targets. The visibility of the airport yield surface reflectance different from the correction with field obtained data, mainly for clear atmospheres, while for visibility close to 10km the difference was smaller. It is concluded that an accurate source of horizontal visibility is key for obtaining correct surface reflectance values.
%9 Correção atmosférica
%@language pt
%3 60007.pdf