Geração de imagens de reflectância de um ponto de vista geométrico

This article presents four methods to produces TOA and surface reflectance factor images. The methods are sorted out in two categories in accordance to sensor swath width, namely narrow or wield swath width. For sensors with narrow swath width the methods are based on look-up tables, since the variability of solar zenith angle inside of the scene can be ignored. For sensors with wield swath width this one is significant and shouldn't be ignored. The methods to process scenes of this type are based on computation of reflectance factor pixel-a-pixel. The radiative transfer model 6S is used to compute the bidirecional reflectance distribution function. The atmosphere is characterized by 6S existent models and by atmospheric haziness image. The preliminaries tests have been done with scenes from LANDSAT-5 TM. The produced images by methods have been checked against the reference images provided by LEDAPS. The results have obtained show concordance between these images.