 The proposed algorithm, SSRAMDIA, is designed to address the issue of incomplete ECHO-SAR imaging caused by azimuth-missing data, AMD. It uses a combination of sub-scene segmentation and reconstruction techniques to expand the maximum depth of focus, DOF, and eliminate the effects of planar approximation in the polar format algorithm, PFA. The algorithm also provides a more accurate reconstruction of the full ECHO compared to the SOAMDIA. This article was authored by Nan Jiang, Jiahua Zhu, Dong Feng, and others.