北斗二号/三号融合载波相位时间传递精度分析

Performance analysis of BDS-2/BDS-3 carrier phase time transfer

摘要: 本文给出了载波相位时间传递数学模型，并基于多模全球卫星导航系统(GNSS)试验跟踪网MGEX (Multi-GNSS Experiment)的实测数据，对北斗二号/北斗三号卫星导航系统(BDS-2/BDS-3)融合载波相位时间传递性能进行分析. 结果表明：BDS-3的加入能够增加测站的可视卫星数量，改善卫星分布空间构型. 相比仅使用BDS-2，BDS-2/BDS-3融合解算可将MRO1-CUSV和NNOR-CUSV的时间传递精度分别从0.11 ns、0.10 ns提高到0.07 ns、0.08 ns，A类不确定度分别从0.007 ns、0.006 ns提高到0.004 ns、0.005 ns.

Abstract: The mathematical model of carrier phase time transfer is given, and the performance of BeiDou-2/BeiDou-3 Navigation Satellite System (BDS-2/BDS-3) combined carrier phase time transfer is analyzed based on the measured data of the multi-GNSS experiment (MGEX). The results show that the addition of BDS-3 can increase the number of visible satellites and improve the spatial configuration of satellite distribution. Compared with only using the BDS-2 system, the time transfer accuracy of MRO1-CUSV and NNOR-CUSV can be improved from 0.11 ns and 0.10 ns to 0.07 ns and 0.08 ns, and the A-class uncertainty can be improved from 0.007 ns and 0.006 ns to 0.004 ns and 0.005 ns, respectively, in the BDS-2/BDS-3 combination scenario.