Abstract: The high squint SAR signal characterizes a large range walk and a small range curvature, which enables us to compress it in range and azimuth separately. But in case of the large azimuth scene size, complex algorithms must be employed to cope with the constraint of focus depth. In this paper we present a simplified fast sub-aperture method which incorporates reshaping in imaging and is able to group sub-images seamlessly. Finally simulation results and real data image are given to verify our method.

Key words: high squint SAR imaging, simplified method, azimuth focus depth