Accuracy analysis of single-point positioning in pseudo-range combined with BDS-3 new frequency and Galileo single frequency
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摘要: 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.
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关键词:
- 北斗三号(BDS-3)/Galileo /
- 相同频率 /
- 单频组合 /
- 伪距定位
Abstract: In order to compare and analyze BDS-3/Galileo compatible frequency pseudorange single-point 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. -
表 1 单系统伪距单点定位精度(RMS值)统计
系统 频率 RMS/m E N U BDS-3 B1C 0.41 0.33 2.93 B2a 0.65 0.45 5.31 Galileo E1 0.58 0.45 2.99 E5a 0.86 0.63 5.36 表 2 双系统组合伪距单点定位精度(RMS值)统计
系统 频率 RMS/m E N U BDS-3/Galileo B1C/E1 0.37 0.26 2.14 B2a/E5a 0.60 0.35 4.22 B1C/E5a 0.40 0.32 2.91 B2a/E1 0.64 0.38 4.62 表 3 双系统频率组合对单系统单频定位精度定量提升统计
频率类型 频率 对B1C提升/% 对B2a提升/% 对E1提升/% 对E5a提升/% E N U E N U E N U E N U 兼容 B1C/E1 9.7 21.2 27.0 36.2 42.2 28.7 B2a/E5a 7.7 22.2 20.5 30.2 44.4 21.3 非兼容 B1C/E5a 2.4 3.0 0.6 B2a/E1 1.5 15.6 12.9 −10.0 15.6 −54.0 53.5 48.2 45.8 -
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