SAR IMAGE GEOREFERENCE REFINEMENT USING REFERENCE OPTICAL IMAGE

The paper proposes an algorithm for refining the geodetic reference of a spaceborne SAR image of the Earth's surface based on correlation coregistration with an accurately referenced raster optical image mosaic. The algorithm is designed to preserve high characteristics of the Earth radar observation information products in the cases of abnormal situations on a satellite, when the accuracy of navigation measurements decreases. Experimental studies have been performed that revealed the upper estimate of the proposed algorithm error.