InSAR phase noise filter in frequency domain

In this paper, we propose an improved InSAR phase filter in frequency domain based on the Goldstein filter. Firstly, we use different window size determined by the coherence to suppress phase noise. Secondly, we use fringe frequencies compensation to eliminate the effect of the terrain topography. Thirdly, we excute the phase filtering procedure pixel by pixel with a new filtering parameter. Another obvious difference is that we use the Fourier transformation of a small window to deal with the power spectrum of InSAR phase patches. The effectiveness of the improved InSAR phase noise filtering method is investigated by both simulated and real data sets.