Abstract
Abstract An algorithm for atmospheric correction was developed for correcting AVIRIS (Airborne Visible and Infrared Imaging Spectrometer) images that were acquired during the 1991 Mac Europe campaign ofNASA/JPL over the ‘Landes’ (south-west France). The methodology is based on the inversion of the 5S atmospheric model, through an iterative procedure that uses the Gauss Seidel principle. The environmental effect is fully taken into account, on a pixel per pixel basis, by the usc of circular neighbourhoods the radii of which are variable with wavelength. Here, input parameters, i.e. optical characteristics of the atmosphere. are estimated with ill situ atmospheric profile and visibility measurements combined with the 5S model. The visual analysis of AVIRIS spectral bands in the blue region clearly showed a heterogeneous spatial distribution of aerosol etTects. Consequently, a procedure was developed which computes the aerosol optical depth directly from the image. The only assumption is the presence of dens...
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