带状SAR成像对瞄准线加速度及正弦速度误差的要求

对合成孔径雷达载体偏离匀速直线运动的误差进行了详细推导,根据回波信号压缩波形主瓣偏移、二次相位误差、三次相位误差以及积分旁瓣比等图像质量指标最大允许值,给出了沿瞄准线(即雷达天线相位中心至目标视线)同时存在恒定加速度和正弦摆动速度误差时,带状正侧视SAR运动补偿要求的解析式. 

SAR MOTION COMPENSATION REQUIREMENT CONCERNINGCOMPLICATED LINE-OF-SIGHT MOTION ERRORS

The working principle of Synthetic Aperture Radar (SAR) based on the knolledge of the relative motion between the vehicle (strictly is Antenna Phase Center)and the target. If the flight path of the vehicle is not accurately known or the SARprocessor is limited in its ability to take the flight data into account, the SAR imagewill be degraded. The purpose of this paper is to study the stripmap SAR MotionCompensation (SARMC) requirement to complicated Line-of-Sight (LOS) motionerrors of flight vehicle and to derive analytical equations of SARMC quantitativerequirement expressed as allowable maximum value of the mainlobe shift, quadraticphase error, cubic phase error and the Integrated Sidelobe Ratio (ISLR).