GPS/BDS星载原子钟的钟差预报

The Prediction of Clock Difference for the Atomic Clock on board GPS/BDS Satellite

研究BDS/GPS不同卫星的钟差,是为了更好地分析我国自主研发的北斗导航系统。采用i GMAS观测站的数据,分析了三种不同轨道的BDS卫星和四种不同钟类型的GPS卫星。卫星钟差的精度直接影响导航系统定位的性能,因此卫星钟差的精度至关重要。此外,介绍多项式模型算法,对短期钟差预报进行了研究。结果表明,GPS系统的钟差精度优于BDS系统;GPS系统的铷(Rb)钟的钟差精度优于铯(Cs)钟。

Studying the clock difference of different satellites of BDS/GPS is to better analyze the Beidou navigation system independently developed by China. This paper uses the data of the iGMAS observation station to analyze the Beidou satellites in three different orbits and the GPS satellites in four different clocks. The accuracy of the satellite clock difference directly affects the positioning performance of the navigation system,so the accuracy of the satellite clock difference is crucial. This article introduces the polynomial model algorithm and studies the short-term clock difference forecast. The results show that the clock difference accuracy of the GPS system is better than that of the BDS system,and the Rb clock of the GPS system is better than Cs clock.