A Robust Autonomous Timekeeping Scheme For Navigation Constellations Using Inter-satellite Links

A Robust Autonomous Timekeeping Scheme For Navigation Constellations Using Inter-satellite Links | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 9 April 2026 V1 Latest version Share on A Robust Autonomous Timekeeping Scheme For Navigation Constellations Using Inter-satellite Links Authors : Lihao Yin , Mingyuan Zhang , Qianyi Ren , and Wenbin Gong 0009-0001-3762-6221 [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.177573452.25258841/v1 931 views 167 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract In this letter, a robust autonomous timekeeping scheme for navigation constellations based on inter-satellite links is proposed. In this scheme, the clocks in the constellation are divided into two groups to generate two Ensemble Times (ET) respectively, then taking the two ETs as references to evaluate the frequency stability of each clock. Abnormal clocks can be identified and excluded from the clock group. After Fault Detection and Exclusion (FDE), the particle swarm optimization (PSO) algorithm is introduced to calculate the optimal weights of the two clock groups using the ensembled time of the opposite group as references respectively. Based on the optimized weights, the final Inter-satellite Link Time (ISLT) is obtained. The simulation implements ISL measurement precision and clock performance parameters of 8 BDS-3 satellites. Simulation results show that when the stability of the ensembled time is significantly higher than that of the evaluated clock, the evaluation results are very close to the true values. In the case of one abnormal clock, the long-term stability of the ISLT obtained by the proposed scheme reaches $1.6\times10^{-14}$ at $\tau=1\;\text{day}$, which is obviously better than $2.3\times10^{-14}$ at $\tau=1\;\text{day}$ using default weights. After 30 days of autonomous operation, the detrended clock difference is 7.8 ns. The research results provide a reference scheme for the autonomous timekeeping of navigation constellations. Supplementary Material File (iet-ell.bib) Download 4.92 KB File (robusttimekeeping.pdf) Download 926.91 KB File (robusttimekeeping.tex) Download 31.35 KB Information & Authors Information Version history V1 Version 1 09 April 2026 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords atomic clocks satellite links satellite navigation time measurement Authors Affiliations Lihao Yin UCAS View all articles by this author Mingyuan Zhang Innovation Academy for Microsatellites of CAS View all articles by this author Qianyi Ren UCAS View all articles by this author Wenbin Gong 0009-0001-3762-6221 [email protected] Innovation Academy for Microsatellites of CAS View all articles by this author Metrics & Citations Metrics Article Usage 931 views 167 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Lihao Yin, Mingyuan Zhang, Qianyi Ren, et al. A Robust Autonomous Timekeeping Scheme For Navigation Constellations Using Inter-satellite Links. Authorea . 09 April 2026. DOI: https://doi.org/10.22541/au.177573452.25258841/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. 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