RFI detection using cross-polarization coherence for dual-and full-polarimetric Synthetic Aperture radar

We propose a method to detect Radio Frequency Interference (RFI) superimposed on synthetic a perture radar (SAR) images using interferometric coherence in both range time and range frequency domain. We assume that RFI contains both horizontally and vertically polarized components at SAR reception, and therefore, propose to detect RFI by calculating similarity of those two channels. The method was applied to actual satellite SAR data and achieved RFI-free images with low computational cost and few RFI components.