基于地形可视性分析的机载气象雷达地杂波剔除方法

摘要

针对机载气象雷达工作于气象模式时的地杂波抑制,该文提出一种基于地形可视性分析的时域地杂波剔除方法.该方法根据可视性判断原理,分析机载雷达可视域地面点的下视角分布的规律,利用其计算雷达波束触地的位置,然后将触地距离单元的回波剔除,从而抑制地杂波.仿真和实测数据验证了该方法的有效性.%A ground clutter elimination method based on terrain visible analysis is proposed for airborne weather radar that operates in weather mode. Visibility judgment is adopted to identify the range bins containing clutter. The view angles for all sampling points in digital terrain model are computed and its distributing rule is analyzed. The view angles and the depression angle of radar are compared. Those range bins with clutter are edited and rejected, so the suppression is directly implemented. Finally, the validity and effectivity of the method are illustrated by processing the simulation data and the measured airborne data.