High-Resolution Real-Time Imaging Processing for Spaceborne Spotlight SAR With Curved Orbit via Subaperture Coherent Superposition in Image Domain. - Yanbin Liu; Guang-Cai Sun; Liang Guo 002; Mengdao Xing; Hanwen Yu; Ruimin Fang; Shiyu Wang (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2022)