Abstract
An analytic model for the radiance applicable to the remote sensing of mountainous terrain is described. This radiance model includes the radiation arising from adjacent terrain outside the instantaneous field of view (IFOV) of the sensor. The atmosphere is treated as the optically thin, horizontally uniform layer bounded by non-homogeneous Lambertian surface. The results derived from the radiance model show that the component of the irradiance impinging on the target due to multiple reflections by adjacent terrain is of no significance except in regions covered with high reflectance materials. It is also shown that the component of the uniform sky irradiance is of no significance exept in very poorly illuminated regions. Furthermore, the correction algorithm for removing atmospheric and topographic effects from high-resolution satellite images is formulated, and the image correction for the Landsat TM image is performed.
