An Imaging Algorithm for High Squint Missile-borne SAR Based on Block Processing

For the high squint mode of missile-borne SAR,analyzes the impact of range cell migration and phase error on imaging.In order to overcome the constraint of the focus depth caused by range walk correction,and improve the accuracy of motion error compensation,an improved RD algorithm based on block processing in azimuth and range cell is proposed.The validity of the proposed method is demonstrated with computer simulation and real data collected by an experimental airborne system.