不同频率组合下的Galileo HAS性能分析  

Galileo HAS performance analysis of different frequency combinations

作　　者：徐宗秋[1] 李智颖 赵洪涛[2] 郑涛[1] 杨南南 XU Zongqiu;LI Zhiying;ZHAO Hongtao;ZHENG Tao;YANG Nannan(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Liaoning Geological Engineering Vocational College,Dandong,Liaoning 118303,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]辽宁地质工程职业学院,辽宁丹东118302

出　　处：《导航定位学报》2025年第2期132-139,共8页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41904037,42074012,42030109);辽宁省重点研发计划项目(2020JH2/10100044);辽宁省“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098);卫星导航系统与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13)。

摘　　要：针对伽利略卫星导航系统(Galileo)高精度定位服务(HAS)性能研究尚处于起步阶段,并且对于不同频率增强性能分析较少的问题,对不同频率组合下的Galileo HAS进行性能分析:选择全球范围内的50个测站,对全球定位系统(GPS)的L1/L2/L5和Galileo的E1/E5a/E5b频率组合进行实时(RT)精密单点定位(PPP)处理;并从收敛时间及定位性能方面进行分析。实验结果表明:1)在定位性能方面,欧洲区域内的定位误差小于非欧洲区域的定位误差。静态模式下Galileo系统中定位误差较小的是E1/E5b组合,高程方向能达到3.5 cm以下的定位误差,而GPS的几种组合中定位误差较小的是L1/L2,在欧洲区域能达到水平3.3 cm以下的定位误差;动态模式下Galileo的E1/E5a和E1/E5b在水平方向定位误差均在7 cm以下,而GPS的L1/L2在8 cm以下。2)在收敛时间方面,欧洲区域内测站的收敛时间明显短于非欧洲测站,且静态模式下欧洲区域内Galileo的2种频率组合E1/E5a和E1/E5b能在13.9 min和15.6 min完成收敛,而GPS的收敛时间较慢,对于全球范围内的测站均在20 min左右;动态模式下Galileo的收敛时间与GPS+Galileo的收敛时间相差不大,欧洲区域需19 min完成收敛,非欧洲区域则需24 min,而GPS对于全球范围内测站均需30 min以上。Aiming at the problem that the high accuracy service(HAS)performance of Galileo navigation satellite system(Galileo)is still in its infancy,and there is a lack of analysis on the performance enhancement of different frequencies,the paper analyzed the performance of Galileo HAS of different frequency combinations:50 stations around the world were selected to perform real-time(RT)precise point positioning(PPP)on the L1/L2/L5 frequency combination of global positioning system(GPS)and E1/E5a/E5b frequency combination of Galileo;then,the convergence time and positioning performance were analyzed.Experimental results showed that:1)In terms of positioning performance,the positioning error in the European region would be smaller than that in the non-European region.In static mode,the smaller positioning error in Galileo would be from E1/E5b combination,which could achieve the positioning error below 3.5 cm in the elevation direction,while the positioning error of L1/L2 among several GPS combinations would be the smallest,which could achieve the positioning error below 3.3 cm in the European region;in kinematic mode,Galileo's E1/E5a and E1/E5b would have horizontal positioning errors of less than 7 cm,while GPS's L1/L2 less than 8 cm.2)In terms of convergence time,the convergence time of European stations would be significantly shorter than that of non-European stations.In static mode,Galileo's two frequency combinations E1/E5a and E1/E5b in Europe could complete convergence in 13.9 min and 15.6 min,while the convergence time of GPS would be slower,requiring 20 min for global stations;the convergence time of Galileo in kinematic mode would be not much different from that of GPS+Galileo,and it would take 19 min for the European region to complete the convergence,24 min for the non-European region,while GPS would take more than 30 min for the global station.

关 键 词：精密单点定位(PPP) 伽利略卫星导航系统(Galileo) 高精度定位服务(HAS) 实时(RT) 

分 类 号：P228[天文地球—大地测量学与测量工程]