Galileo广播星历评估及其对定位精度的影响

分析现阶段伽利略空间信号的精度，并评估伽利略广播星历及其对单点定位的影响。统计30 d健康卫星广播星历，结果表明，FOC和IOV两种类型的广播星历卫星轨道误差优于0.8 m，并且径向误差最小，法向误差次之，切向误差最大；伽利略卫星的钟差误差精度达到1.0 ns；从空间信号测距误差对伽利略卫星进行整体分析，广播星历精度优于1.0 m，FOC与IOV卫星精度相当；用广播星历进行事后单点定位的精度可以达到dm级。

Evaluation Galileo Broadcast Ephemeris and Its Influence on Positioning Accuracy

This paper analyzes the accuracy of Galileo spatial signal and Galileo broadcast ephemeris at the present stage. We examine statistics and analyze 30 days health satellite ephemeris in this paper. The results show that the satellite orbit error of FOC and IOV is better than 0.8 m, and the radial error is the smallest. The accuracy of the Galileo satellite clock bias is 1.0 ns. From the spatial signal ranging error to the Galileo satellite, the accuracy of the broadcast ephemeris is better than 1 m, and the accuracy of FOC is equivalent to that of IOV satellite. Single point positioning using broadcast ephemeris precision can reach up to the decimeter level.