THz-ISAR Imaging of Space Targets Based on Cross-Term Suppression and Rearrangement in the Time-Frequency Domain

Due to the absence of atmospheric interference, space-based terahertz (THz) inverse synthetic aperture radar (ISAR) can obtain high-resolution images of space satellites at long ranges, offering significant application potential. However, the intricate relative dynamics between the sensing platform and the target induce non-uniform variations in the radar-target aspect angle, resulting in severe image defocusing. This paper proposes a non-parametric THz-ISAR imaging algorithm for non-uniformly r