摘要
为了使欧亚ABS-2A卫星双向链路早日用于国际标准时间协调世界时(UTC)计算并长期稳定运行,提出一种基于Express-80的欧亚链路性能测试方法:选取组网中4条长、短基线卫星双向时间频率传递(TWSTFT)比对链路2022年3月的观测数据,以已校准的全球定位系统(GPS)精密单点定位(PPP)链路数据为参考,利用修正阿伦方差和与参考链路作差结果的标准偏差等指标对双向链路开展性能分析。结果表明,通过Express-80卫星构建的欧亚链路双向时间比对的天稳为10-15量级,与GPS PPP链路作差结果的标准差小于0.5 ns,与GPS PPP时间传递结果一致,说明建立的卫星双向链路可以用于UTC的计算。
In order to enable the two-way link of Eurasian ABS-2A satellite to be used for international standard time coordinated universal time(UTC)computing as soon as possible and to run stably for a long time,the paper proposed a performance test method of Eurasian link based on Express-80:the observation data of the four long and short baseline two-way satellite time and frequency transfer(TWSTFT)comparison links in the network in March 2022 were selected;and taking the calibrated global positioning system(GPS)precise point positioning(PPP)link data as a reference,the modified Allan variance and the the standard deviation of the results between the TWSTFT and the reference link were used to analyze the performance of the TWSTFT link.Result showed that the stability of TWSTFT comparison through the Eurasian link constructed by the Express-80 satellite would reach the order of magnitude of 1×10^(-15)/d,and the standard deviation between the TWSTFT and GPS PPP link would be less than 0.5 ns,which is consistent with GPS PPP solutions,indicating that the established TWSTFT link could be used for UTC calculation.
作者
高喆
王威雄
王翔
郭栋
武文俊
董绍武
GAO Zhe;WANG Weixiong;WANG Xiang;GUO Dong;WU Wenjun;DONG Shaowu(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《导航定位学报》
CSCD
2023年第4期24-30,共7页
Journal of Navigation and Positioning
基金
中国科学院青年创新促进会项目(2020402)。
