Research on the Imaging Method of Long-Distance High-Speed Targets in the Earth-Moon Space

Accurate monitoring and imaging of long-distance and high-speed moving targets by space platform is a long-term technical difficulty. In this paper, we analyzed and summarized classical radar imaging methods of long-range and high speed moving space targets according to the relative motion characteristics of earth-moon space target in the process of overflying, which contained Range Doppler Algorithm, ω-K Algorithm, Chirp Scaling Algorithm, Back Projection Algorithm, Polar Formation Algorithm and the STFT based imaging method. We simulated the effects of range, velocity and multi-target on these imaging algorithms and compared the imaging resolution and running time of each algorithm. Simulation results were presented in the paper which confirmed that the combination of Range Doppler Algorithm of ISAR and SAR algorithms could achieve the imaging effect with stable amplitude and better resolution when the space platform imaged long-range and high-speed space targets.