A fast and efficient technique for SAR interferogram geocoding

A new efficient technique for SAR interferogram geocoding is presented. The method is based on the well-known geolocation approach which is used to relate the SAR signal domain to the geometric Euclidian space in which all geo-information is represented. In contrast to common approaches the geocoding problem is solved via an object-to-image transformation, hence allowing the user to precisely define the desired DEM sampling. The methodology appears to be extremely fast, yet highly accurate since supplementary interpolation of the DEM values can be avoided by proper over-sampling of the interferogram data.