关于脉冲星时定义的初步探讨  

Preliminary study on the definition of pulsar time

作　　者：何婷 郑勇 HE Ting;ZHENG Yong(PLA Strategic Support Force Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]中国人民解放军战略支援部队信息工程大学,郑州450001

出　　处：《时间频率学报》2023年第3期249-259,共11页Journal of Time and Frequency

基　　金：南京大学“银发双创”资助项目(YFSC202003)。

摘　　要：毫秒脉冲星作为新发现的稳定频率源,为新的时间计量标准的产生奠定了物理基础。基于毫秒脉冲星自转周期建立的脉冲星时间计量基准,对人类拓展时间计量及应用的时空维度,提升时间标准精度、安全性等方面具有重要意义。目前学术界对脉冲星时的研究主要集中在如何通过长期的脉冲星计时观测,实现对脉冲星计时模型的持续修正和精化。从严格意义上说,脉冲星时尚未有一个明确、完整的定义。这既不利于对脉冲星时的科学理解和研究,也不利于其时间计量基准的标准化、规范化建立及维持与应用。为此,论文在回顾总结现有时间计量标准定义及其发展的基础上,依据时间计量标准定义的基本惯例,遵循独立性、可测性、稳定性、一致性、可复制性和可用性原则,提出了脉冲星时的初步定义,包括脉冲星时起点、秒长的定义等;探讨了脉冲星钟设计及脉冲星时建立、维持与应用的初步思路。本文内容只是个人观点,希望能为脉冲星时的定义提供参考,为脉冲星钟的研制提供新的角度和思路。As a newly discovered stable frequency source,millisecond pulsar may become a physical foundation for the definition of new time measurement standard.Pulsar time defined based on the rotation period of the millisecond pulsar is of great significance in expanding the spatial and temporal dimension of time measurement and improving the accuracy of time standard and the security of timing applications.However,current studies on the definition of pulsar time mainly focus on continuous corrections and refinements of pulsar timing models through long-term pulsar timing observations.Strictly speaking,the definition of pulsar time has not yet been clear and complete,which is not conducive to the scientific understanding and research of pulsar time,nor is it conducive to the standardized establishment,maintenance and application of its time measurement standard.Therefore,on the basis of summarizing the definition of the existing time measurement standards and their development,according to the basic convention of the definition of time measurement standard,and following the principles of independence,measurability,stability,consistency,replicability and usability,the preliminary definition of pulsar time is proposed by this paper,including the definition of starting point and second length of pulsar time and so on;The basic ideas of the design of pulsar clock and the establishment,maintenance and application of pulsar time are discussed.The content of this paper is just a personal opinion,hopefully it can provide a reference for the formal definition of pulsar time,and provide new perspectives for the development of pulsar clocks.

关 键 词：时间计量标准 原子时 脉冲星时 脉冲星时定义 

分 类 号：P127.1[天文地球—天体测量]