中近程战术导航台空域覆盖特性分析

Analysis on Airspace Coverage Performance of Short-Range Tactics Navigation Station

中近程战术导航系统(塔康,俄制近程)信标天线下视波分量因周边地面反射,与直射波叠加后其合成场强度随距离呈峰-谷状分布,位于谷区的飞机因场信号过弱会丢失导航信息。本文描述了基于信标天线/机载天线高度、方向图特性、地空距离、地面反射系数等参数的合成场峰-谷区分布规律,分析了各参数影响,并归纳了弱化反射场效应的选项。

The beaconing antenna downward-looking wave of the short-range tactics navigation reflect because of the surface around, after adding the direct wave, its intensity is peak-valley distributed by the distance, and the airplane located in the valley area might lose the navigation signal causing by the too weakness signals. Based on beaconing/airborne antenna height, direction chart characteristic, ground-to-air distance and the surface reflection, the peak-valley distribution is described in this paper. The influences on each parameter are analyzed, and the options of softeninz the reflection are concluded.