Abstract: A robust approach to ground moving target indication and localization is proposed for the multi-channel SAR system in the presence of coregistration errors. In the proposed approach， the joint eigen steering vector of a moving target is constructed according to its space steering vector and eigen coefficient vector, the optimal beamforming approach is used to suppress the clutter, the velocity of the moving target can be determined simultaneously, and the moving target can be relocalized subsequently. This method has good robustness to image coregistration errors, and can provide accurate estimate of the ground moving target radial velocity. The validity and superiority of this method are verified by simulated data.

Key words: synthetic aperture radar (SAR), ground moving target indication (GMTI), coregistration error, joint eigen steering vector