无源时差定位布站形式对定位精度的影响

用时差法对空中机动目标进行定位,地面至少需要四个基站工作,而地面基站的布站形式对定位精度有很大的影响.通过计算机对时差定位的三种基本布站形式进行分析和仿真,得出了目标定位精度与布站方式的关系,即在相同的测量条件下达到最优的测量结果.通过建立时差定位模型,分析影响定位精度的各因素,得出了不同布站情况下的几何精度因子图,为无源时差定位系统的布站提供理论指导.

Influence of Passive Location System Station on Target Location Precision

Using TDOA (Time Difference of Arrival) position system locate 3-D moving target, it needs at least four stations- The layout of passive position system influences positioning precision directly. With the help of computer, three basic layouts are discussed, the connection of position precision and layout is educed. The model of target positioning system using TDOA is discussed, some factors which influence positioning precision are analyzed and some graphs of GDOP (Geometrical Dilution of Precision) are presented, which can give some theoretical instructions to the layout of passive location system.