Vibration Error Analysis and Motion Compensation of Video Synthetic Aperture Radar

Leida xuebao

Li-Chao¹  Fang Guang-you¹  Ji Yi-cai¹  Zhang Qun-ying¹  Zhao Yu-lu¹ 

[1] Key Laboratory of Electromagnetic Radiation and Detection Technology, Institute of Electronics, Chinese Academy of Sciences;

关键词: Synthetic Aperture Radar (SAR);    High frame rate;    Vibration errors;    Motion compensation;   

DOI  :  10.12000/JR14153

来源: DOAJ

【 摘 要 】

Video Synthetic Aperture Radar (ViSAR) system offers high imaging frame rate, and high resolution, and it is consequently used to investigate and locate near-moving targets. Compared with microwave SAR, the practical application of ViSAR is restricted by motion compensation caused by short wavelength. Even slight platform vibrations cause significant variations in the phase of echo signal.Thus, it is imperative to analyze the motion compensation and the error of ViSAR. In this study, the results show that imaging is affected less in the direction of flight direction and by low vibration in the direction of the slant range. In contrast, high-frequency vibration in the direction of the slant range requires higher compensation accuracy. Given the particularity of ViSAR's motion compensation, a compensation scheme is designed to achieve high compensation precision .The effectiveness of the scheme is verified by ViSAR imaging simulation experiments.

【 授权许可】

Unknown