本程序为星载降水雷达卫星测量地面降雨时，回波的归一化雷达散射截面图。 主程序为FiSAR，其他两个程序为嵌套的函数。-This procedure for the spaceborne precipitation radar satellite measurements of rainfall on the ground, the echoes of the normalized radar cross section diagram. The main program for the Fi