The evaluation models of detection power and the airspace overlay index of the multi-station TOA location passive radar system are established. The selection of subsidiary station site and the altitude optimizing positioning between the subsidiary station and the main station are analyzed. The two failure modes of the system are discussed and the impact caused by the target position change upon the combat ability of the passive radar system when one of the subsidiary stations fails is emulated. It provides the theoretical basis for the practical application and can be applied to the location optimization as a practical method.%提出了四站时差定位无源雷达系统的探测威力模型及覆盖度指数评估模型,分析了系统在实际部署应用中面临的辅站站址的选择、主辅站高度优化配置等问题.论述了系统在实际运行中可能出现2种故障模式,并定量仿真分析了目标位置变化对辅站故障时系统探测能力的影响.分析方法及所得结论对系统的实际部署使用具有理论指导意义,且可作为一种实用方法用于具体部署优化决策.
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