Galileo高精度定位服务初始服务性能评估

Performance Evaluation of the Initial Service of Galileo High Accuracy Service

从服务改正数可用性、轨道钟差精度等方面综合分析高精度定位服务(high accuracy service,HAS)的性能,同时利用全球各区域的多模GNSS实验跟踪网(multi-GNSS experiment,MGEX)测站分析HAS PPP的性能。结果表明,大部分卫星改正数的可用性在80%以上;GPS和Galileo的空间信号测距误差(signal-in-space ranging error,SISRE)分别为0.163 m、0.097 m;MGEX测站水平方向定位精度均小于0.2 m,垂直方向均小于0.4 m。

This paper comprehensively analyzes the performance of high accuracy service(HAS)from the aspects of service correction availability,track accuracy,clock correction accuracy,and so on.At the same time,we analyze the performance of HAS PPP using MGEX stations in different regions of the world.The results show that the availability of most satellite corrections is at least 80%.Signal-in-space ranging error(SISRE)of GPS and Galileo are 0.163 m and 0.097 m,respectively.The accuracy of MGEX stations is less than 0.2 m in the horizontal direction and 0.4 m in the vertical direction.