An algorithm of moving target detection, radial velocity estimation and relocation based on ATI(along-track interferometry) with dual-aperture antenna was proposed. Compared with DPCA (displaced phase center antenna) technique, this method need not satisfy the strict constraint between platform velocity and pulse repetition frequency. Meanwhile, it overcame the shortcoming of decreased slow moving target detection ability because of moving target amplitude cancellation varying with radial velocity according to sinusoid rule generated by DPCA and CSI (clutter suppression interferometry) techniques. On the basis of ATI principle analysis, the realization method of moving target detection, radial velocity estimation and relocation using interferometric phase information was presented. This method can perform the detection, radial velocity estimation and relocation of moving targets masked by ground clutters. Computer simulation results show the effectiveness.
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