A comparison between simulated data and measurements performed by means of a spectroradiometer has been done. We searched a correlation between Aerosol Optical Depth, measured the over a wide spectral range, and TOMS Aerosol Index, which is satellite retrieved. This comparison has been done for both desertic aerosol (measurements taken in Namibia, 1998) and rural aerosol (measurements realized in Southern Italy, 2000 and 2001). At the same time, the simulation code MODTRAN has been used, in order to obtain both synthetic Aerosol Optical Depth and Aerosol Index. Finally, we compared measured and simulated correlation, finding, a good agreement for desertic aerosol.
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