Two Dimensional Kalman Filter Approach for Phase Unwrapping of TerraSAR-X Data

Against the background of availableness of good resolved SAR image pairs which come from the German radar satellite TerraSAR-X, we investigate in solving the problem of unwrapping the phase image obtained from a noisy interferometric SAR (InSAR) image. A Kalman filter based data fusion approach to unwrap and simultaneously filter the phases of interferometric SAR images is developed. The data fusion concept exploits phase information, extracted from the complex interferogram rather than from the phase image and fuses that information with phase slope information extracted from the power spectral density of the interferogram.