多GNSS精密单点定位性能分析  

Performance Analysis of Multi-GNSS Precise Point Positioning

作　　者：丁赫 孙付平[1] 门葆红[1] 满小三 李亚萍[1] 叶险峰[2] 

机构地区：[1]信息工程大学,河南郑州450001 [2]湘潭大学能源工程学院,湖南湘潭411100

出　　处：《测绘科学技术学报》2016年第1期21-26,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41374027);湖南省教育厅资助科研项目(13C903)

摘　　要：在实现BDS/GPS/GLONASS组合精密单点定位的基础上,模拟多种遮挡环境;利用3个MGEX测站的数据进行三系统组合PPP试验;并在可见卫星数、PDOP值、定位精度、收敛时间和定位可用性等方面与GPS单系统PPP进行了比较分析。结果表明：在亚太地区,相比于GPS单系统PPP,三系统组合PPP可见卫星数增加了2~3倍,PDOP值显著减小。动态试验中,在无遮挡环境下,三系统组合PPP相较于GPS PPP收敛时间更短,且收敛后定位精度更高;在遮挡环境下,GPS PPP性能急剧下降,三系统组合PPP较好的保证了定位精度,提高了系统定位可用性。Based on the realization of BDS / GPS / GLONASS combined PPP（ Precise Point Positioning）, multi-GNSS PPP is tested under various masking environments. Three MGEX stations are used to compare BDS / GPS / GLONASS combined PPP with GPS-only PPP on the aspects of satellite visibility, PDOP value, convergence time, positioning accuracy and availability. The results show that： compared to GPS-only PPP, the combined PPP has 2 to3 times visible satellites and the PDOP value reduces observably; in kinematic PPP without masking environment,both the convergence time and the accuracy of combined PPP are improved; in masking environment, the performance of GPS-only PPP decreases sharply, but the combined PPP still has a preferable positioning accuracy which improves the availability.

关 键 词：BDS/GPS/GLONASS组合系统 PDOP值 精密单点定位 可用性 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]