The New Generation System of Japan Standard Time at NICT

[摘要] NICT hascompleted a set of major upgrades in its systems for the realization of Japan standard time. One ofthe most significant changes is the introductionof hydrogen masers as signal sources for UTC (NICT)instead of Cs atomic clocks. This greatly improves the short-term stability ofUTC (NICT). Another major change is the introductionof a newly developed 24-channel dual-mixer-time-difference system(DMTD) as the main tool for measurements. The reliabilityof the system is also improved by enhanced redundancy and monitoring systems. The new JST system has been in regular operation since February 2006.

[学科分类] 电子、光学、磁材料