A dataset of national time and frequency system

Time-frequency data is one of the important national information resources. The national time and frequency system dataset includes TAI (International Atomic Time), UTC(NTSC) (Coordinate Universal Time maintained by National Time Service Center of Chinese Academy of Sciences), atomic clock weights, atomic clock rates, the electronic version of the Time and Frequency Bulletin released by NTSC and the Earth Rotation Bulletins A, B, C, and D published by the International Earth Rotation Service (IERS),etc.

This paper introduces the calculation and generation process of atomic clock weight dataset and rate dataset, the data acquisition process and data structure of time-frequency bulletin and earth rotation bulletins, the data quality control analysis, the validity of the dataset, etc. It also introduces the application of the dataset from the aspects of atomic clock performance evaluation, atomic time scale calculation, and time-keeping system evaluation, etc.