Abstract
Because of its off-nadir viewing, the Advanced Solid-State Array Spectroradiometer (ASAS) presents a new challenge for atmospheric correction. One of the main differences between the atmospheric effect on nadir and off-nadir observations is the adjacency effect. To remove the adjacency effect on 45/spl deg/ viewing ASAS images, we extracted a first-order analytic approximation of the atmospheric point spread function (PSF) using the relationship between the physical quantities and the geometry of the sensor, target pixel and environmental pixel. The correction results by a Wiener filter based on the PSF demonstrate that this method of removing the adjacency effect is feasible and effective.
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