星载降水测量雷达杂波计算与分析

为了保证最佳距离分辨率，星载降水测量雷达（SPR）的扫描方式通常设计为在垂直于飞行向的方向上扫描，以下视的方式观测大气层内的降水分布，这样降雨回波就会受到强烈的地杂波（包括主瓣杂波和副瓣杂波）干扰。文中详细论述了SPR主／副瓣杂波的产生原理、星地几何关系以及计算步骤，最后通过仿真总结了SPR杂波的一些特性和对杂波抑制方法的建议。文中所述的主／副瓣杂波的计算方法适用于SPR的设计，对其他机栽、星载下视雷达的杂波计算也有参考作用。

Clutter Computation and Analysis of Space-Borne Precipitation Radar

To provide optimal range resolution,the space-borne precipitation radar(SPR) is usually arranged to scan back and forth across the flying direction of the satellite and to observe the precipitation distribution in the atmosphere in down-looking mode.But the SPR thus receives lots of strong ground clutter(including mainlobe clutter and sidelobe clutter).The computation method and geometry model and the causes of mainlobe/sidelobe clutter of SPR are carefully analyzed in this paper.Finally,the clutter charact...