A simple “clear water” atmospheric correction algorithm for Landsat-5 sensors下载

In this study, an atmospheric correction algorithm (improved “clear water” atmospheric correction algorithm for broad-band sensors, or “ICAB” algorithm) was constructed and tested, and the results are shown in this paper. The Rayleigh scattering contributions at three visible bands and one near-infrared (NIR) band were estimated using the lookup table method. The remote sensing reflectance associated with aerosol scattering at the NIR bands was estimated with the “clear water” method. The Angstrom exponential model was used to extrapolate the aerosol scattering contribution from the NIR bands into visible bands. An innovative empirical spectral relationship of spectral empirical relationship of 485nm vs. 560nm was constructed for estimating the exponential coefficient of the Angstrom exponential model. According to the case study performed in Taihu Lake, China, the results of which are shown in this paper, it was found that spectral characteristics in shape and magnitude estimated by the ICAB algorithm were quite similar to the typical spectral of water body, and the uncertainties of the ICAB algorithm at three visible bands and one NIR band were 7.45%, 10.57%, 13.51% and 17.14%, respectively.