Topography Adaptive Filtering of Phase Image Based On Residue Matrix

At present, SAR interferometry (InSAR) is the foreland of radar remote sensing. This paper will suggest residual matrix used as the factor of filtering to interferometric phase image. Two kinds of filters for phase image are modified through utilizing residual matrix. The modified filters have different filter intensity in different areas of the phase image according to noise condition. Therefore they can realize an adaptive filtering effect and preserve topographical information and fringes in areas with steep slopes. The implementation of the filters is described in detail and the effectiveness is tested by using the interferometric phase data generated from ERS-1 repeat-pass