北斗卫星在轨原子钟稳定性分析  

Stability Analysis of Atomic Clocks Onboard the Beidou Satellites

作　　者：孟祥广[1,2] 孙越强[1,2] 杜起飞[1,2] 白伟华[1,2] 张绍成[3] 柳聪亮[1,2] 夏俊明[1,2] 

机构地区：[1]中国科学院国家空间科学中心,北京市南二条1号100190 [2]天基空间环境探测北京市重点实验室,北京市南二条1号100190 [3]中国地质大学(武汉)信息工程学院,武汉市鲁磨路388号430074

出　　处：《大地测量与地球动力学》2016年第7期574-576,580,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41505030;41405039;41405040);中国科学院科研装备研制项目(YZ201129)~~

摘　　要：使用IGS MEGX发布的北斗卫星精密钟差数据,利用哈达玛方差公式对目前所有在轨健康北斗卫星钟的稳定性进行分析。结果表明,北斗卫星钟在1a的跨度内比较稳定;其300s稳定性量级为10^(-13),但是各颗卫星并不完全相同;北斗卫星钟与GPS卫星钟的稳定性对比显示,北斗卫星钟稳定性介于GPSⅡR-M与GPSⅡF上搭载的铷钟之间。The atomic clocks onboard navigation satellites provide the reference frequency for the navigation signals,and the stability of the clock will directly influence the accuracy of timing and positioning performance.In this paper,the IGS MEGX clock products for Beidou satellites are used for analysis,and the Hadamard variance is used to calibrate the clock stability of all orbiting Beidou satellites.The results show that the clocks onboard Beidou satellites are relatively stable over 1 year＇s analysis;and the Hadamard variance is about 10^-13 on 300 sinterval with slight differences between different Beidou satellites.Compared with GPS satellite clocks,the stability performance is between those of GPS ⅡR-M and GPS ⅡF satellite clock performance.These results are beneficial for navigation and positioning users.

关 键 词：北斗导航卫星系统 原子钟 哈达玛方差 稳定性分析 

分 类 号：P228[天文地球—大地测量学与测量工程]