“北斗”卫星导航系统仿真与全球覆盖分析

Simulation and Global Coverage Analysis of Beidou Navigation Satellite System

为了解"北斗"卫星导航系统(BDS)的星座分布及其正式运行后卫星在全球范围内的覆盖情况,依据BDS卫星轨道参数,使用卫星工具包(STK)构建了完整的BDS空间星座,对BDS卫星轨道信息、可见性以及对地覆盖品质进行分析。在对可见性及覆盖品质的分析中,分别仿真分析了在4个不同的城市和全球范围进行观测得到的几何精度因子(GDOP)和导航精度等参数性能。研究结果对分析BDS系统的服务性能以及提高BDS的导航精度有一定的参考意义。

To learn constellation distribution and satellites global coverage after formal operation of Beidounavigation satellite system（BDS）,this paper simulates the complete constellation of BDS by Satellite ToolKit（STK） with the published information of BDS satellite orbit parameters. The orbital parameters,accessand coverage of satellites are analyzed based on the simulated constellation of BDS. The performance of geometricdilution of precision （ GDOP） and navigation accuracy in four different stations and global area aresimulated. The results of this study have a certain reference value for analyzing the service performance andimproving BDS navigation accuracy.