Radial velocity ambiguity mitigation of moving target by dual-subband ATI approach with a two-channel SAR

The estimated radial velocity of moving target can be ambiguous in traditional two-channel synthetic aperture radar (SAR) system using along-track-interferometry (ATI) method. To mitigate radial velocity ambiguity of the moving target, we first establish the model of a two-channel SAR system and analyzed the basic principle of the dual-subband ATI (DS_ATI) approach. Then, we apply the model and the approach to process real data, the results demonstrated the effectiveness of the DS_ATI approach.