关键词: 时间传递, 量值溯源, 铷钟, 时间同步

Abstract: In order to achieve better traceability results and improve the reliability of the time traceability system based on remote time transfer method,a fusing traceability method was studied.The multi-method time & frequency traceability comparison device was developed by disciplining rubidium clocks with reference to UTC(BIRM) and using GNSS common-view and two way optical fiber methods,and a remote time traceability comparison system was preliminarily constructed based on the device.Through experimental verification,the multi-method time & frequency traceability comparison device replicated high-performance real-time time scale synchronized with UTC(BIRM) at remote user station.The time deviation of real-time time scale by GNSS common-view is within ±4 ns,and the time deviation of real-time time scale by two way optical fiber is within ±2 ns.

Key words: Time transfer, Traceability, Rubidium clock, Time synchronization