Relationship Between Satellite Attitude Jitter and SAR Imaging Quality
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摘要: 建立了卫星姿态指向抖动的数学模型,基于成对回波畸变理论推导了存在姿态指向抖动时点目标扩展函数的解析表达式,提出了卫星姿态指向抖动幅度与星载SAR(合成孔径雷达)成像质量关系的定量分析方法,为SAR卫星总体分析与设计提供了理论依据.计算机仿真结果验证了结论的正确性.Abstract: To provide a theoretical foundation for the design and analysis of spaceborne SAR, a method quantitatively analyzing the relationship between attitude distortion and spaceborne SAR imaging quality was developed, based on a mathematical model describing satellite attitude jitter and an expression of impulse response function for attitude jitter. The validity of the theoretical results was confirmed by computer simulation.
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Key words:
- synthetic aperture radar /
- satellite attitude /
- radar echo /
- pared-echo
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[1] Raney R K. Wave orbital velocity, fade and SAR response to azimuth waves[J]. IEEE Journal Oceanic Engineering, 1981,6:2~4. [2] Curlander J C. Mcdonough R N. Synthetic aperture radar: system and signal processing[M]. New York: Wiley, 1991. [3] 张澄波.综合孔径雷达——原理、系统分析与应用[M].北京:科学出版社,1989. [4] 章仁为.卫星轨道姿态动力学与控制[M].北京:北京航空航天大学出版社,1998.
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