Overview of Precise Time and Frequency Transfer Technology

doi:10.13474/j.cnki.11-2246.2018.0133

Abstract

Abstract:

Precise time and frequency transfer technology plays an important role in many fields currently.And it is also one of the key technologies for the establishment and maintenance of UTC (coordinated universal time) and TAI (international atomic time).In this paper,three major precise time and frequency transfer technologies are studied.The results show that the satellite time and frequency transfer technology has been most maturely and most widely used,while it also faces the challenges in performance improvement,security and environmental suitability.Optical fibers time and frequency transfer technology take advantage of optical fiber transmission technology and achieves high performance.But it can be easily affected by temperature as well as has some limitations in range,cost and flexibility.Laser time transfer technology is based on satellite laser range technology and mainly used in performance enhancement of satellite navigation system.However,it has very limited applicability because of its speciality.The study of this paper can help to develop national time and frequency system with high precision,high stability,high reliability and security.

Key words: precise time and frequency transfer, GNSS time and frequency transfer, two-way satellite time and frequency transfer, optical fibers time and frequency transfer, laser time transfer

CLC Number:

HE Ting, CHEN Guojun, MA Jialin. Overview of Precise Time and Frequency Transfer Technology[J]. 测绘通报, 2018, 0(5): 1-5.

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