Abstract:

As one of the basilica steps in InSAR data processing, the accuracy of registration affects the quality of subsequent processing. Because of different flight attitudes, there is large relative deformation between images obtain by airborne SAR system from different flight courses. Conventional methods cannot deal with the entire images. In this paper, the robustness of the SIFT matching algorithm and high precision of analytic search registration approach are combined, excluding the mismatch using the relationship between the flight path and statistical analysis of offset between images, and a method is proposed for registration of airborne repeat pass InSAR, which effectively solves the problem in registration of airborne repeat pass InSAR. First, SIFT matching algorithm to extract matching points, and then eliminate false matching points using the relationship between flight courses and statistical analysis of the offset of matching points, to complete the rough registration, and finally use analytic search method to complete the fine resolution. P-band airborne repeat pass InSAR data obtained by CASMSAR are processed and good results are achieved.

Key words: airborne, InSAR, SIFT, Mismatch removed, analytic search registration approach