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24 February 2004 Atmospheric correction algorithm for multiangular satellite measurements in the solar spectrum
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Multiangular and hyperspectral capabilities of the last generation of remote sensing sensors require new data processing algorithms that can take advantage of this new type of information. In terms of atmospheric correction, taking into account surface directional reflectance properties leads to a coupling between surface and atmospheric radiative transfer effects that cannot be analitically decoupled in the most general case, so other strategies must be developed. In addition to this, commonly used radiative transfer codes are based on a plane-parallel atmosphere approximation, what causes problems for large view and illumination zenith angles. The aim of this paper is to present an atmospheric correction method based on Vermote et al. scheme for MODIS atmospheric correction. It considers BRDF effects in the surface, improving 6S code calculations in off-nadir configurations . We have simulated the top-of-the-atmosphere reflectances using nine different natural surfaces by means of MODTRAN4 radiative transfer code. The reflectance angular pattern retrieved for each surface has allowed us to validate the model and check the improvements versus the original MODIS algorithm.
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Luis Guanter, Jose M. Marti, and Jose F. Moreno "Atmospheric correction algorithm for multiangular satellite measurements in the solar spectrum", Proc. SPIE 5232, Remote Sensing for Agriculture, Ecosystems, and Hydrology V, (24 February 2004);

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