GPS/BDS/GLONASS多系统组合定位分析

Analysis on Positioning of Combined GPS/BDS/GLONASS Multi-system

可见卫星数是评价导航系统定位性能的一个重要指标,也是系统可用性的基本要求。均方根差(亦称中误差)是观测精度的数据标准。本文通过实验分析了不同环境下的多系统组合的可见星数以及中误差,进而研究了多系统组合在不同环境中的可用性及定位精度。实验结果表明:在相同环境下,系统组合的可用性大幅提高,精度高于单GPS系统的精度,其中GPS/BDS/GLONASS三系统组合测量精度最高,GPS/BDS组合精度次之,GPS/GLONASS组合精度略低于GPS/BDS组合。

Visible satellite number is an important indicator of the positioning performance of the navigation system and it is also the basic requirement of system availability .And the root mean square error is the standard of the observation accuracy .Through experi-ments ,I analyze the number of visible stars and the mean square difference of multi system in different environments .In order to study the availability of multi system combination , and the positioning accuracy .Experimental result shows that under the same environ-ment , a substantial increase in the availability of system combination model and its precision is higher than that the precision of GPS , which GPS/BDS/GLONASS system combined measurement accuracy the highest , GPS/BDS accuracy combination times and combined GPS /GLONASS accuracy slightly lower than GPS/BDS combination of precision .