During radar tracking target in low elevation, the measuring error of tracked target was removed or reduced with array antenna beam forming technique that can reduce the multi-path error.

当雷达在低仰角跟踪时，降低多径误差的阵列天线波束的形成技术，可消除或降低低仰角跟踪目标时的测量误差。

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For the problem of multi-path effects, firstly the low-angle target tracking model of sea-surface is built up, and the geometric relationship among target, image and radar is analyzed.

针对多径效应的问题，首先建立海面低空目标的跟踪模型，分析了目标、镜像和雷达之间几何关系。

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