摘要
伽利略卫星导航系统（GNSS）提供高精度的定位导航授时服务已经一年有余,很有必要对这个阶段的星载钟性能进行评估,相关方法能够为我国北斗三代星载氢原子钟的评估提供参考。基于此目的,从多个角度分析了伽利略卫星导航系统正式运行期间所有可用星载氢原子钟的性能。表明哈德玛方差为适用于星载氢原子钟的时域频率稳定度统计方法;将采样间隔为5 min的钟差序列重采样为低频序列时,对于星载钟稳定度几乎没有影响;缺失数据天数越多,对星载钟稳定度影响越大,还表明星载钟的噪声类型和星载钟稳定度关系密切。
The high precision positionnavigationtiming service has been offered by Galileo navigation satellite system for more than one year, it is necessary to evaluate the performance of on-board clock during this period. The related evaluation method can be used as the reference for the BDS-3 on-board hydrogen maser. The performance on the on-board Hydrogen clock is analyzed since the official service starts. It shows that Hadamard variance is the optimal statistics. Moreover, resampling the clock difference to low-frequency clock difference has no influence on the stability. The more days of missing data, the greater the impact on the stability of the on-board clock. It is also verified that the noise type of on-board clock closely relatedto the stability of on-board clock.
作者
钦伟瑾
葛玉龙
杨旭海
Qin Weijin;Ge Yulong;Yang Xuhai(National Time Service Center,Chinese Academy of Science,Xi＇an 710600,China;University of Chinese Academy of Science,Beijing 100039,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2018年第10期93-99,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(11703033)项目资助
关键词
伽利略卫星导航系统
星载氢钟
哈德玛方差
稳定度
频率漂移
Galileo navigation satellite system
on-board Hydrogen maser
Hadamard variance
stability
frequency drift
