Study on Pointing Accuracy Effect on Image Quality of Space-borne Video SAR

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Liang, Jian^1 ; Zhang, Hefen^1 ; Zhao, Yang^1 ; Chen, Gang^1 ; Wang, Qingquan^1 ; Liu, He^1

Beijing Institute of Spacecraft System Engineering, Beijing, China^1

关键词: Effect model;    Index systems;    Pointing accuracy;    Pointing errors;    Radiation performance;    Sidelobe ratios;    Single frame image;    System errors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/7/072011/pdf
DOI  :  10.1088/1757-899X/490/7/072011

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Effect of satellite pointing accuracy on spaceborne video SAR imaging quality has been studied in this paper to solve the problem of indicators decomposition. First, the effect model of pointing error on the single frame image quality was established based on the rough and precise imaging. Then the relationship between the stability of Video SAR and pointing accuracy error has been analysised. Finally, the simulations prove the validity of the analysis. The analysis and the simulation results show that the attitude pointing error mainly affects the resolution, sidelobe ratio, ambiguity and radiation performance. For the video mode, the shift and rotation of the beam covering area were caused by the attitude pointing error. The result of the report can be used to distribute the system error and establish the index system.