各卫星导航系统纷纷将精密单点定位服务作为系统的标准服务向用户提供.BDS-3的精密单点定位服务(PPP-B2b)和QZSS的实验厘米级增强服务CLAS-E(Centimeter Level Augmentation Service for Experi-ment)已率先向用户提供实时精密单点定位服务,但对比分析两系统精密单点定位服务性能的研究较为缺乏.文中以CODE分析中心的最终产品作为参考,对比分析了PPP-B2b与CLAS-E的服务性能;并采用MGEX的 4 个测站观测数据验证了两种服务的定位性能.结果显示,目前两系统提供的精密单点定位服务均支持厘米级静态定位应用,PPP-B2b在轨道钟差精度、定位精度、收敛时间和服务范围上均稍逊于CLAS-E.CLAS-E播发的改正产品中GPS BLOCK IIF卫星受轨道机动影响,轨道误差会发生跳变.BDS-3仍然在发展建设当中,相信PPP-B2b的服务性能将会进一步提升.
Comparative Analysis of Performance of BDS-3 Precise Point Positioning Service and QZSS Centimeter Level Augmentation Service for Experiment
Many satellite navigation systems provide precise point positioning service as a standard service.Current-ly,BDS-3 Precise Point Positioning Service(PPP-B2b)and QZSS Experimental Centimeter Level Augmentation Service for Experiment(CLAS-E)are the first two systems to offer real-time precise point positioning services to users.However,there is a lack of research to compare and analyze the service performance between the two sys-tems.In this paper,the final product of CODE analysis center is used as a reference to compare and analyze the service performance of PPP-B2b and CLAS-E,and the observation data of four MGEX stations are used to verify their positioning performance.The results show that the precise point positioning services provided by the two sys-tems both support centimeter-level static positioning applications,and the PPP-B2b is slightly inferior to CLAS-E in terms of orbit and clock accuracy,positioning accuracy,convergence time and service scope.Affected by the or-bit maneuver of GPS BLOCK IIF satellites,abrupt jumps are observed in the corresponding orbit error series of CLAS-E correction products.It is believed that with the continuous development of BDS-3,the performance of PPP-B2b services will be further improved.
precise point positioningCLAS-Eephemeris comparisonreal-time servicequality assessment
万方数据
维普
