从波束控制策略、天线方向图加权、目标回波积累时间方面对滑动扫描合成孔径雷达(TOPSAR)进行分析,给出TOPSAR方位分辨率和模糊度的计算公式。总结了部分关键系统参数设计特点,对TOPSAR信号特点进行了分析,并对点目标进行了成像仿真。

A mode is analyzed in terms of beam steering law, azimuth antenna pattern and target illuminated time. Formulas of azimuth resolution and ambiguity ratio are presented. The calculation of some critical system parameters for terrain observation by progressive scans SAR(TOPSAR) is discussed. Signal characteristics of TOPSAR acquisition mode are analyzed. A combined processing flow of TOPSAR imaging is proposed and validated by point target simulation.