A New Approach to Sar Interferogram Geocoding

Several geocoding methods for SAR interferometry are compared. The discussion results in the proposal of a new geocoding model. It is based on a least squares adjustment combining interferometric phase, range, Doppler centroid frequency, flight path and control point data. A complete mathematical framework for the computation of object space coordinates without approximations is presented. This gives a way to an efficient implementation of the algorithm for geocoding the pixels of an interferogram.