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Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps

Atomic clock frequency jumps directly influence the accuracy and reliability of timekeeping systems. The necessary corrections are typically implemented by postprocessing mutual comparison data between multiple atomic clocks based on the overly strict assumption that these atomic clocks are independ...

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Detalles Bibliográficos
Autores principales: Liu, Mochi, Chen, Yu, Xu, Qian, Wang, Yuzhuo, Gao, Yuan, Zhang, Aimin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9696367/
https://www.ncbi.nlm.nih.gov/pubmed/36433590
http://dx.doi.org/10.3390/s22228995
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author Liu, Mochi
Chen, Yu
Xu, Qian
Wang, Yuzhuo
Gao, Yuan
Zhang, Aimin
author_facet Liu, Mochi
Chen, Yu
Xu, Qian
Wang, Yuzhuo
Gao, Yuan
Zhang, Aimin
author_sort Liu, Mochi
collection PubMed
description Atomic clock frequency jumps directly influence the accuracy and reliability of timekeeping systems. The necessary corrections are typically implemented by postprocessing mutual comparison data between multiple atomic clocks based on the overly strict assumption that these atomic clocks are independent of each other. This paper describes the concept of a mirror clock, which enables atomic clock frequency jumps to be identified in real time without any assumptions. By comparing whether the real measured data and a corresponding mirror clock prediction fall within a confidence interval determined by the uncertainty of past physical clock data, atomic clock frequency jumps can be effectively identified and corrected. The results of several experiments using three hydrogen masers verify that the precision and recall of simultaneous jump identification reach 96.41% and 73.49%, respectively.
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spelling pubmed-96963672022-11-26 Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps Liu, Mochi Chen, Yu Xu, Qian Wang, Yuzhuo Gao, Yuan Zhang, Aimin Sensors (Basel) Article Atomic clock frequency jumps directly influence the accuracy and reliability of timekeeping systems. The necessary corrections are typically implemented by postprocessing mutual comparison data between multiple atomic clocks based on the overly strict assumption that these atomic clocks are independent of each other. This paper describes the concept of a mirror clock, which enables atomic clock frequency jumps to be identified in real time without any assumptions. By comparing whether the real measured data and a corresponding mirror clock prediction fall within a confidence interval determined by the uncertainty of past physical clock data, atomic clock frequency jumps can be effectively identified and corrected. The results of several experiments using three hydrogen masers verify that the precision and recall of simultaneous jump identification reach 96.41% and 73.49%, respectively. MDPI 2022-11-21 /pmc/articles/PMC9696367/ /pubmed/36433590 http://dx.doi.org/10.3390/s22228995 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Mochi
Chen, Yu
Xu, Qian
Wang, Yuzhuo
Gao, Yuan
Zhang, Aimin
Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title_full Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title_fullStr Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title_full_unstemmed Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title_short Mirror Clock: A Strategy for Identifying Atomic Clock Frequency Jumps
title_sort mirror clock: a strategy for identifying atomic clock frequency jumps
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9696367/
https://www.ncbi.nlm.nih.gov/pubmed/36433590
http://dx.doi.org/10.3390/s22228995
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