精测雷达低仰角测角误差规律的研究

Research on low elevation angle error of precision instrumentation radar

对精测雷达低仰角测角误差规律进行研究,分析了精测雷达回波测量原理,并计算其天线差波束波瓣能量分布情况;研究雷达直射地物回波及地面遮挡对雷达跟踪目标的影响,并与传统多路径效应模型进行对比,得出传统多路径效应模型对雷达低仰角误差的影响并不是主要的;最后结合精测雷达对地物回波的实测数据得出雷达低仰角测角误差的真实变化规律。

The low elevation angle error of precision instrumentation radar is studied in this paper. The echo measurement principle of precision instrumentation radar is analyzed. The lobes energy distribution of antenna difference beam is calculated. The effects of echo signals of direct ground object and the ground shielding on radar′s target tracking is researched. In compari-son with the traditional multipath effect model,it is found that the influence of the traditional multipath effect model on the ra-dar low elevation angle error is not important. The real changing rule of low elevation angle error of precision instrumentation ra-dar was obtained by the measured ground echo datas of precision instrumentation radar.