雷达超视距探测的实验研究

Experimental Study of the Radar's Over-the-horizon Detection

在海上频繁出现的蒸发波导可以使雷达的电波信号以较小的衰减在类似于金属波导的大气层结内传播,从而可实现雷达的超视距探测。为了检验雷达实现超视距探测的距离、信号强度等参数与实际蒸发波导的相互关系,采用了高精度的大气波导测试仪在典型海面进行了蒸发波导的实际测量,同时利用岸上雷达进行目标探测。实测结果表明,雷达在蒸发波导条件下能够实现超视距探测,且探测距离和信号强度与蒸发波导的特征参数相关。

The radar electromagnetic wave is able to propagate to a far fetch with a low attenuation in the evaporation duct which appears on the sea frequently,just like in the metal pipeline,so radar can be used to realize the overthe-horizon detection.In order to check up the correlativity of the parameter of the over-the-horizon detection such as distant and the intensity of the signal,etc.and the real evaporation duct,high precision device for atmospheric duct test is used,also use radar which at the bank to detect at the same time.The result shows that radar is able to actualize over-the-horizon detection in the evaporation duct condition,and the distant of detection and the signal intensity are relative to the characteristic parameters of the evaporation duct.