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Initial result of single channel CSAR GMTI based on background subtraction

A new ground moving target indication algorithm for single channel Circular Synthetic Aperture Radar (CSAR) is presented and evaluated by airborne CSAR dataset. The algorithm is based on overlap subaperture magnitude images. The subaperture image can be regarded as the background image (clutter) plus the foreground image (moving target). The background image is obtained by median filter. Then the moving targets can be detected by using the subaperture magnitude images subtracting the background image. The algorithm is tested by GOTCHA GMTI dataset. The algorithm is capable of real-time processing and detecting multiple moving targets. And the initial results is presented in the paper.