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| A Study on Evalution of Local Time Scale |
| HUANG Yan1,GAO Yuan2 |
1.Beijing Institute of Metrology, Beijing 100029, China
2. National Institute of Metrology, Beijing 100013, China |
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Abstract Apparently, whether local time scale runs good depends on how it is close to international standard time UTC, but it is more important that the consistency of the second definition reproduced by local time scale and by standard time UTC. Based on the concept defined by BIPM about International Atomic Time (TAI) and Coordinated Universal Time (UTC), it is proposed that fractional frequency difference and time stability are the technical criteria to evaluate the local time scale. The argument above is proved by data analysis from six worldwide timekeeping laboratories with fractional frequency difference and time stability, and then this dissertation give some specific analysis about the relationship between each laboratory’s time scale generation program and the two indexes.
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2012, Vol. 33 
