接收机天线相位中心变化对GLONASS精密单点定位性能影响评估

The assessment of receiver PCV corrections on GLONASS PPP performance

研究接收机天线相位中心变化(PCV)对俄罗斯全球卫星导航系统(GLONASS)定位和对流层估计的影响分析。定位方面,分析接收机PCV改正与否对单GLONASS静态精密单点定位(PPP)三维坐标精度的影响,同时探讨将全球定位系统(GPS)和GLONASS系统对应的接收机PCV改正用于GLONASS PPP的定位研究的可行性与可用性。对流层估计方面,综合研究了在静态PPP和固定坐标PPP两种解算模式中接收机PCV改正对对流层延迟估计精度的影响。选取全球均匀分布的180个IGS站一个月(2017年4月份)的数据进行处理,结果表明,采用GPS或GLONASS系统对应的接收机PCV改正均可明显提升GLONASS PPP垂向坐标和对流层延迟估计精度。相比于采用GPS系统接收机PCV,GLONASS系统对应的接收机PCV改正对GLONASS PPP垂向坐标和对流层延迟估计精度有进一步的提升。

This contribution focused on the impact of receiver antenna phase center variation(PCV)corrections on global navigation satellite system(GLONASS)-only precise point positioning(PPP)performance and tropospheric delay estimation.In terms of positioning,this study investigated if there were influence that receiver PCV corrections on GLONASS-only static PPP performance.Furthermore,the receiver PCV corrections corresponding to global positioning system(GPS)and GLONASS system were both utilized in GLONASS-only PPP to study the necessity of correcting receiver PCVs with the corresponding satellite system.In the aspect of tropospheric delay estimation,the impact of receiver PCV corrections on the estimated accuracy of tropospheric delay was comprehensively studied by means of two processing modes namely coordinatestatic and coordinate-fixed PPP.The experimental results of 180 International GNSS Service(IGS)stations with observations spans in April,2017 showed that the GPS/GLONASS system corresponding receiver PCV correction could significantly improve the GLONASS PPP vertical coordinate and tropospheric delay estimation accuracy.Compared with that of GPS,the receiver PCV correction corresponding to the GLONASS system furtherly improved the GLONASS PPP vertical coordinate and tropospheric delay estimation accuracy.