推导了雷达载体作匀速直线运动时，载体初始位置，速度以及合成孔径时间表示的聚束照射ＳＡＲ等效合成孔径长度的解析式，给出了以雷达工作波长，合成孔径起始及终止时刻速度矢量与天线相位中心到目标瞄准线之间夹角表示的聚束照射ＳＡＲ方位分辨率的理论表达式。

This paper derives the effective synthetic aperture length equation expressed as the initial position, the velocity and the synthetic aperture time when the radar operates in spotlight mode and the vehicle does uniform straight line motion, gives the ideal azimuth resolution equation expressed as the radar wavelength, the angles between velocity vector and line of sight from the antenna phase center to target at the begining and end time of synthetic aperture.

TN958 TN953