InSAR periodic median adaptive filtering algorithm based on the phase frequency credibility

The filtering of the interferogram is an important step in the data processing of interferometric synthetic aperture radar (InSAR). Considering the characteristics of the interferometric fringe, this paper transforms the interferometric fringe into frequency domain, and estimates the credibility of the phase frequency to which the periodic median filtering algorithm is weighted according. It is also the rule of judging the change of the adaptive filtering windows. The algorithm can effectively remove the noise of phase, minimize the signal loss. Experimental results show the validity of the proposed algorithm and the improved performances through the filtering procedures.