一种定位系统的定位精度衰减因子

Study of Geometric Dilution of Precision in a Positioning System

介绍在一种定位系统中几何精度因子(GDOP)值的计算方法,利用这种方法计算在地面布站个数、布站边长以及飞行器飞行高度等因素影响下的GDOP值,由此分析出这些因素对GDOP值的影响,最终提出该系统的布站策略和提高定位精度的优化方案。

The calculating method of Geometric Dilution of Precision (GDOP) in a positioning system is introduced. By this method, the value of GDOP under the circumstances of some certain factors, say, the quantity of grounds stations, the distance between ground stations and the user's flying height, can be worked out.With the help of the value, this paper analyses the influences that these factors have on GDOP. At the end, the ground station distributing strategy and optimized scheme are given.