GPS/北斗-2组合定位性能的研究

摘要

The BeiDou-2 satellites system navigation system has been basically completed the construction of Geostationary satellites and Inclined Geosynchronous satellites.Three Medium Earth Orbit satellites were launched in April 14,2007 and April 30,2012.The BeiDou-2 can separately provide positioning function in China and neighboring area currently.This paper evaluated the positioning performance of GPS/Compass combination system and two stand-alone systems by analysis of number of visible satellites,position dilution of precision,stability and accuracy.The results show that the combination mode further improves the positioning performance of separate system mode.The BeiDou-2 system has reaches the 10 meters level in the horizontal direction of the positioning accuracy.%今年年底北斗卫星导航系统已基本完成地球静止轨道卫星和倾斜地球同步轨道卫星的建设工作.目前,在中国及周边地区北斗导航系统已经可以单独提供定位服务.本文对GPS/北斗组合系统以及GPS北斗单独系统在上海的定位性能进行了评估,分析了在不同模式下的可视卫星数量、几何精度因子、定位的稳定性和准确性.结果表明组合定位进一步提高了单独系统模式下的定位性能,北斗系统目前在水平方向上的定位精度已经达到10米级.