全球定位系统2026，Vol.51Issue(4)：30-36,7.DOI:10.12265/j.gnss.2026191
双向比对方法在eLoran系统内应用研究
Research on the application of a two-way comparison method in eLoran systems
李振中 1牛亚飞 1杨朝中 1齐信1
作者信息
- 1. 中国科学院国家授时中心,西安 710600
- 折叠
摘要
Abstract
eLoran is an important component of the international standard positioning,navigation and timing(PNT)system.High-precision time-frequency synchronization among transmitting stations is essential for stable PNT service,but conventional synchronization methods mainly rely on external techniques such as satellite common-view,optical fiber transfer,or transported clocks.To reduce this external dependence,this paper proposes a two-way time-frequency transfer method based on eLoran signals.In the proposed method,two eLoran transmitting stations receive each other's signals carrying timing information,perform local time-difference measurements,and exchange observation data to obtain the time-frequency transfer result.Owing to the reciprocal propagation path between the two stations,the propagation delay can be largely canceled.Experimental results on 736 km and 486 km baselines verify the feasibility of the proposed method.The measured 10 000 s stability reaches 10-12,respectively.The results show that the proposed method can realize time-frequency synchronization among eLoran transmitting stations by using the system's own signals,thereby improving system autonomy and reducing dependence on external synchronization links.关键词
增强型罗兰(eLoran)/频率校准/双向时频传递/传播时延抵消/Vondrak 滤波Key words
eLoran/two-way time-frequency transfer/time synchronization/propagation delay cancellation/stability evaluation分类
天文与地球科学引用本文复制引用
李振中,牛亚飞,杨朝中,齐信..双向比对方法在eLoran系统内应用研究[J].全球定位系统,2026,51(4):30-36,7.
