区域无线电导航系统中几何精度因子的分析

Analysis of GDOP in territorial radio navigation system

区域无线电导航系统中,几何精度因子(GDOP)对系统的定位精度有着非常重要的影响.在此介绍了一种基于圆-圆定位体制下的区域无线电导航定位系统几何精度因子的计算方法,并讨论了几何精度因子的一些特性,包括导航台位置和数量对GDOP值的影响.文章还对GDOP特性进行了计算机仿真.在此基础上提出了关于系统导航台布局的一些结论.

Geometry dilution of position （GDOP） is very important in the navigation precision of territorial radio navigation system. In this paper, a calculation method is proposed for GDOP of teritorial Radio Navigation system based on circular curve location and some characteristics are discussed, including the effect of location and number of ground stations on GDOP value. The paper also gives simulation of GDOP characteristics. Furthermore, some recommendations of the optimal layout of ground stations are given.