中国空间科学技术

中国空间科学技术 ›› 2025, Vol. 45 ›› Issue (4): 183-193.doi: 10.16708/j.cnki.1000-758X.2025.0099

• 论文 • 上一篇    

短基线精密共视时间传递解算策略优化

郭慧芝，韩保民*，孙令阳，肖伟   

  1. 山东理工大学 建筑工程与空间信息学院，淄博255000
  • 收稿日期:2024-06-06 修回日期:2024-09-10 录用日期:2024-09-15 发布日期:2025-07-22 出版日期:2025-08-01

Optimization of solution strategy for short baseline precise

GUO Huizhi，HAN Baomin*，SUN Lingyang，XIAO Wei   

  1. School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo 255000, China
  • Received:2024-06-06 Revision received:2024-09-10 Accepted:2024-09-15 Online:2025-07-22 Published:2025-08-01

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摘要： 短基线精密共视时间传递是时频领域基础工作之一，已成为GNSS时频领域的研究热点。为提高短基线精密共视时间传递精度及可靠性，在对多种短基线精密共视时间传递解算策略比较的基础上，基于光纤双向时间传递试验比对结果，提出了一种基于短基线精密共视时间传递解算策略的优化方案。用西安多个跟踪站连续多天观测数据展开试验，试验结果表明：对于超短基线情况不宜采用任何电离层和对流层修正模型；而当基线较长时，必须采用合适的对流层和电离层修正模型。使用无电离层组合解算方案对短距离精密共视时间传递精度最高可提升76.9%，达到亚纳秒量级，修正效果明显；对流层延迟方案对于短基线时间传递精度改善不明显；适当降低截止高度角，提高可见卫星数量，时间传递精度也能得到提升；双向滤波改善了收敛问题，对时间传递精度最高可提升40.9%。

关键词: 精密共视, 时间传递, 电离层延迟, 对流层延迟, 截止高度角, 滤波

Abstract: Short baseline precise common-view time transfer is one of the fundamental tasks in the time-frequency domain and has become a research hotspot of GNSS time-frequency. In order to improve the accuracy and reliability of short baseline precise common-view time transfer, various strategies are compared, and an optimization scheme is presented in this paper based on the results of fiber optic bidirectional time transfer experiments. Experiments are conducted, using continuous observation data from multiple tracking stations in Xi'an for multiple days. The experimental results show that it is not advisable to use any ionospheric and tropospheric correction models for ultra short baseline situations. When the baseline is long, appropriate tropospheric and ionospheric correction models must be used. The ionospheric delay modified by the ionosphere-free combination can significantly improve the accuracy of the results by up to 76.9%. The result of the accuracy improvement effect is not obvious by correcting the troposphere. The number of visible satellites can be increased by appropriately reducing the elevation mask, and the results can be improved with this method. Bidirectional filtering can improve convergence, and the time transmission precision can be improved by 40.9%. 


Key words: precise common view, time transmission, ionosphere delay, tropospheric delay, elevation mask, filter