| NTSC时频比对中的Galileo E3总时延校准 |
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| 引用本文： | 郭栋,董绍武,武文俊,王威雄,宋会杰,王翔.NTSC时频比对中的Galileo E3总时延校准[J].天文学报,2023,64(5):55. |
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| 作者姓名： | 郭栋 董绍武 武文俊 王威雄 宋会杰 王翔 |
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| 作者单位： | 中国科学院国家授时中心 西安 710600;中国科学院大学天文与空间科学学院 北京 100049 |
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| 基金项目： | 国家自然科学基金项目(11703030)、中国科学院西部之光项目(XAB2021YN22)资助 |
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| 摘 要： | 为了提升时间传递链路的可靠性, 国际权度局(Bureau International des Poids et Mesures, BIPM)自\lk2020年起将Galileo时间比对正式作为UTC (Coordinated Universal Time)计算的备份链路, 因此对接收机Ga-lileo信号时延校准是全球各守时实验室参与UTC链路的必要工作. 以德国物理技术研究院(Physikalisch-Tech-nische Bundesanstalt, PTB)和中国科学院国家授时中心(National Time Service Center, NTSC)已校准的GPS (Global Positioning System)链路为参考, 将PT09接收机设为参考站, 对NTSC的NT02和NT05两台不同型号接收机的Galileo E3 (Galileo E1&E5a)总时延进行校准并验证. 结果表明: NT02和NT05 Galileo E3总时延分别为74.6ns和46.5ns, 校准不确定度均为3.5ns, 且校准时延比较稳定; NT02和NT05校准后与其他守时实验室已校准接收机的GPS P3和Galileo E3链路的共视比对结果基本一致; 以NTP3与其他实验室接收机GPS P3链路的共视比对结果为参考, 其偏差均值均小于1.5ns, 在校准不确定度范围内.
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| 关 键 词： | Galileo E3 时延校准 校准不确定度 |
| 收稿时间： | 2022/8/10 0:00:00 |
Galileo E3 Total Time Delay Calibration in NTSC Time and Frequency Comparison |
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| GUO Dong,DONG Shao-wu,WU Wen-jun,WANG Wei-xiong,SONG Hui-jie,WANG Xiang.Galileo E3 Total Time Delay Calibration in NTSC Time and Frequency Comparison[J].Acta Astronomica Sinica,2023,64(5):55. |
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| Authors: | GUO Dong DONG Shao-wu WU Wen-jun WANG Wei-xiong SONG Hui-jie WANG Xiang |
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| Institution: | National Time Service Center, Chinese Academy of Sciences, Xián 710600;School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | In order to improve the reliability of the time transfer link, Bureau International des Poids et Mesures (BIPM) has officially taken the Galileo time comparison as the backup link for UTC calculation since 2020. Therefore, the delay calibration of the Galileo signal of the receiver is a necessary work for all time-keeping labs around the world to participate in the UTC link. Taking the GPS link calibrated by Physikalisch-Technische Bundesanstalt (PTB) and the National Time Service Center (NTSC) as a reference, this paper sets PT09 receiver as a reference station to calibrate and verify the total Galileo E3 (Galileo E1&E5a) delay of NT02 and NT05 receivers of NTSC. The results show that the total Galileo E3 delays of NT02 and NT05 are 74.6ns and 46.5ns respectively, the calibration uncertainty is 3.5ns, and the calibration delay is relatively stable. After calibration, the results of GPS P3 and Galileo E3 common view comparison between NT02 and NT05 receivers of NTSC and calibrated receivers of other time-keeping labs are basically consistent. Taking the comparison results of GPS P3 links between NTP3 and receivers of other labs as a reference, the average deviation is less than 1.5ns, which is within the calibration uncertainty. |
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| Keywords: | Galileo E3 time-delay calibration calibration uncertainty |
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