Title :
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
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;
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
DOI :
10.1109/FCS.2015.7138907
