BDS-3新频率与Galileo单频组合伪距单点定位精度分析

为对比分析北斗三号（BDS-3）/Galileo相同频率伪距单点定位精度，基于MGEX（Multi-GNSS Experiment）分布的跟踪站实测数据，分析了BDS-3、Galileo以及BDS-3/Galileo单系统单频、双系统相同频率组合和非相同频率组合伪距单点定位精度. 经研究发现，BDS-3/Galileo相比单系统有效提升了卫星可见数与卫星空间分布几何结构，在单系统定位方面，BDS-3系统B1C和B2a伪距单点定位精度优于Galileo对应相同频率的伪距单点定位精度，在双系统定位方面，BDS-3/Galileo相同频率组合伪距单点定位精度优于非相同频率组合，双系统组合定位对Galileo单系统定位精度提升优于BDS-3，表明BDS-3相同频率的设计有效地提升了与Galileo系统的兼容性. 

Accuracy analysis of single-point positioning in pseudo-range combined with BDS-3 new frequency and Galileo single frequency

In order to compare and analyze BDS-3/Galileo compatible frequency pseudorange singlepoint positioning accuracy,based on the measured data of MGEX distributed tracking stations,singal point positioning accuracy of pseudorange combination of dual-system compatible frequencies and non-compatible frequenry of BDS-3 and Galileo are analyzed,together with that of single frequency of BDS-3 and Galileo respectively.It is found through research that BDS-3/Galileo combination effectively improves the visible number of satellites and the geometric structure of satellite spatial distribution compared to a single system.In terms of single system positioning,the single point positioning accuracy of B1C and B2a pseudorange of BDS-3 is better than that of comesponding compatible frequenry of Galileo.In terms of dual-system positioning,the single point positioning accuracy of compatible frequenry pseudorange combination of BDS-3/Galileo is better than that of non-compatible frequenry combination.and the dual-system combination positioning improves the Galileo single-system positioning accuracy better BDS-3,which indicates that the design of BDS-3 compatible frequency effectively improves the compatibility with Galileo system.