| 时间基准的现在和未来 |
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| 引用本文： | 蔡志武,袁海波,张升康.时间基准的现在和未来[J].导航定位于授时,2023,10(3):21-28. |
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| 作者姓名： | 蔡志武 袁海波 张升康 |
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| 作者单位： | 北京卫星导航中心，北京 100094;中国科学院国家授时中心，西安 710600;北京无线电计量测试研究所，北京 100854 |
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| 摘 要： | 介绍了时间基准、时间系统的基本内涵及常用类型，阐述了当前时间基准的理论定义、计量定义、物理实现。分析评估了时间基准未来可能的发展变化，特别是对光钟的影响、秒定义的变化、闰秒的变化等进行了详细分析。考虑到我国实际情况，从基础研究、技术试验和体系应用的角度给出了关于时间基准的一些思考和建议。
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| 关 键 词： | 时间基准 协调世界时 秒定义 光钟 闰秒 |
Present and future of time standard |
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| CAI Zhiwu,YUAN Haibo,ZHANG Shengkang.Present and future of time standard[J].Navigation Positioning & Timing,2023,10(3):21-28. |
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| Authors: | CAI Zhiwu YUAN Haibo ZHANG Shengkang |
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| Abstract: | This paper introduces the basic connotation and common types of time standard and time systems, and expounds the theoretical definition, metrological definition, and physical implementation of the current time standard. It analyzes and evaluates the possible development and changes of time standard in the future, especially the impact of optical clocks, changes in second definitions, and changes in leap seconds. Considering the actual situation in China, some thoughts and suggestions on time standard are put forward from the perspectives of basic research, technical experiments, and system applications. |
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| Keywords: | Primary time standard Coordinated universal time Definition of second Optical clock Leap second |
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