Interferometric Analysis of Raw Data for Radio Frequency Interference Detection in ALOS-2

Inhalt:
In this paper, we propose a novel radio frequency interference (RFI) detection method for multi-receiver SAR systems. The approach is based on the differences between scattered radar echoes and direct signal of RFI, and further assumed that RFI signals have more similarity than echoes in a multi-receiver SAR system. Based on this idea, we developed an interferometric analysis method for separating RFI polluted bands from the SAR raw data. Experimental results show an effectiveness of the proposed method by reducing the noise level in the sea area by up to 3dB.