An algorithm of acquiring terrain slope based on interferogram

By analyzing mapping geometry of interferometric synthetic aperture radar, the relation between terrain slope and interferogram is explained. Then an approach which can acquire terrain slope using interferogram is presented. Results using airborne InSAR system data show validity of our algorithm. The algorithm avoids phase unwrapping and absolute phase calibration which are usually computational burden for traditional processing method. And the algorithm will play an important role in project of responding to nature disaster real-time.