Airborne Squinted Spotlight SAR Imaging using Polar Format Algorithm

Though several reconstruction methods have been studied in stripmap-mode SAR with a squint angle, it is a still difficult task to obtain the high quality images in the case of the spotlight SAR with a squint angle. In general, the polar format algorithm has been used for the processing of the airborne squint-mode spotlight SAR. However, the PEA has limitations of the scene size and the squint angle. Thus, to compensate the shortcomings, we analyze the errors and introduce a compensation technique based on the subarea technique and the Taylor approximation