中国空间科学技术

中国空间科学技术

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SAR成像对瞄准线方向运动补偿的要求

曹福祥,袁建平   

  1. 西北工业大学航天工程学院
  • 发布日期:1999-06-25

SAR Motion Compensation Requirement Concerning Complicated Line of Sight Motion Errors

Cao Fuxiang Yuan Jianping (Northwestern Polytechnical University,Xian 710072)   

  • Online:1999-06-25

被引次数

8

摘要： 载体偏离匀速直线运动的运动误差是合成孔径雷达成像的基本困难之一。文章就载体沿瞄准线方向（即雷达天线相位中心至目标视线）同时存在恒定的速度误差和恒定的加速度、同时存在恒定的速度误差和正弦摆动速度误差两种情况进行了详细推导；根据回波信号压缩波形的主瓣偏移、二次相位误差、三次相位误差以及积分旁瓣比等图像指标的最大允许值，给出了带状正侧视合成孔径雷达瞄准线方向运动补偿定量要求的解析式，并结合一例子进行了计算分析。

关键词: 合成孔径雷达, 运动, 补偿, 误差分析

Abstract: Synthetic Aperture Radar(SAR)relies on knowledge of the relative motion between the flight vehicle(strictly is Antenna Phase Center)and the target.If the flight path of the flight vehicle is not accurately known or the SAR processor is limited in its ability to take the flight data into account,the SAR image will be degraded.This paper studies stripmap SAR Motion Compensation(SARMC)requirement to two types of line of sight(LOS)complicated motion errors of fligtht vehicle,gives analytical equations of SARMC quantitative requirement to LOS comphicated motion errors expressed as allowable maximum value of the mainlobe shift,quadratic phase error,cubic phase error and the Integrated Sidelobe Ratio (ISLR).