Experience of RFI Signatures in SAR Across Different Frequency Bands

Radio Frequency Interference (RFI) phenomenon occurs when there is an interference between SAR main signal and a signal originating from another source operating in the same frequency band. It is observed as various kinds of bright stripes/artifacts in SAR raw data as well as azimuth time range frequency spectrum. It introduces high-intensity hazy patterns in the processed image predominantly in the low SNR regions. RFI affects the contrast and overall radiometric quality of the image. This paper discusses different kinds of RFI patterns observed in Spaceborne SAR raw data across different frequency bands. RFI detection and suppression on raw data using frequency domain algorithm and its impact on the processed image is discussed.