Focusing Highly Squinted SAR Data of a Short-Range Wide-Swath Region Using Azimuth-Dependent High-Order RCMC and Frequency Extended Nonlinear Chirp Scaling Based on Equidistant Sphere Model - Hua Zhong; Jianhua Huang; Mengyuan Wang; Han Wu; Yingcheng Ding; Hao Nai; Jiunan Dong; Shenghao Zhang (IEEE Access, 2022)