摘要
星载钟性能分析对于系统完好性监测、卫星钟差确定和预报等具有重要作用。GLONASS(Global Navigation Satellite System)于2011年10月完成全球组网,目前在轨卫星全部搭载铯钟。采用欧洲定轨中心(CODE)提供的2018年4月1日00:00:00至2019年3月31日00:00:00期间的GLONASS事后精密卫星钟差产品,通过频率准确度、漂移率和稳定度3个指标对GLONASS星载钟在轨性能进行了分析。结果表明,GLONASS星载铯钟的频率准确度在10^-13~10^-12量级,频率漂移率小于1×10^-14/d,日稳定度优于1×10^-13。
Analyzing the performance of satellite clock in space plays a key role in navigation system integrity monitoring,and satellite clock bias determination and prediction.By October 2011,Global Navigation Satellite System(GLONASS)had achieved full global coverage.Currently,all the in-flight satellites of GLONASS are equipped with high-precision Cesium clocks.In this paper,the performance of the in-orbit Cesium clocks equipped in GLONASS satellites is analyzed focusing on three indexes,namely frequency accuracy,drift and stability,by using the post precise GLONASS satellite clock products during April 1,2018 and March 31,2019 provided by the Center for Orbit Determination in Europe(CODE).The results show that the frequency accuracy of the Cesium clocks is in the order of 10^-13~10^-12,the frequency drift 1×10^-14/d,and the frequency stability reaches the 1×10^-12 level in 1 day interval.
作者
赵丹宁
ZHAO Dan-ning(School of Electrical&Electronic Engineering,Baoji University of Arts and Sciences,Baoji 721016,China)
出处
《时间频率学报》
CSCD
2020年第1期66-71,共6页
Journal of Time and Frequency
基金
国家自然科学基金资助项目(11503031)。
