Investigating the correlation between hydrogen-maser clocks in the same place

Author

Gao, C. ; Wang, B. ; Zhu, X. ; Li, T.C. ; Wang, L.J.

Author_Institution

Joint Inst. for Meas. Sci., Tsinghua Univ., Beijing, China

fYear

2015

fDate

12-16 April 2015

Firstpage

562

Lastpage

564

Abstract

Using fiber based frequency dissemination system, we are building Beijing regional time and frequency network. Currently, Tsinghua University (THU), the Changping site of National Institute of Metrology (NIM-Changping) and Beijing Institute of Radio Measurement (BIRM) have been linked and synchronized via the fiber network. The frequency signals of three hydrogen masers, two placed in NIM, one in BRIM are transferred to Tsinghua University, and compared with the local hydrogen maser. By this remote comparison, the absolute frequency stability of each clock as well as the correlations between the two clocks in NIM are measured and studied.

Keywords

atomic clocks; correlation methods; frequency stability; synchronisation; BIRM; Beijing Institute of Radio Measurement; Changping site; NIM; National Institute of Metrology; THU; Tsinghua University; fiber based frequency dissemination system; frequency stability; hydrogen maser clock; synchronization; Clocks; Correlation; Masers; Optical fiber networks; Thermal stability; Time-frequency analysis; correlations; frequency network; frequency stability; frequency transfer; three-corner-hat;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International

Conference_Location

Denver, CO

Print_ISBN

978-1-4799-8865-5

Type

conf

DOI

10.1109/FCS.2015.7138907

Filename

7138907