脉冲星时是与原子时物理机制不同的时间尺度，比原子时具有更高的长期频率稳定度和可靠性。将脉冲星时用于原子时守时工作中，有望构建一种能够兼顾原子时和脉冲星时的优点并可以提供实时服务的时间尺度，提高时间基准的长期稳定性，是未来守时的长远发展方向。本项目针对目前守时工作中存在的潜在问题，研究脉冲星时在守时工作中的应用方法，包括脉冲星时建立与保持方法、脉冲星钟和原子钟联合守时的基础理论和瓶颈技术、利用脉冲星钟驾驭原子钟的主要制约因素和应对策略等，并利用中国科学院国家授时中心的原子钟守时资料及昊平40米射电望远镜的毫秒脉冲星计时资料，开展联合守时试验。本项目研究成果可促进脉冲星时在我国守时中的应用，可提高我国时间基准的长期稳定性、可靠性和自主性。这在我国守时原子钟依赖从国外进口的情况下，充分利用脉冲星钟资源，有可能解决从外国购买原子钟遇到的卡脖子问题。

The pulsar time is a time scale different from the physical mechanism of the atomic time. It has higher long-term frequency stability and reliability than the atomic time. When pulsar time is applied to atomic time keeping, it is expected to construct a time scale that can take advantage of both atomic time and pulsar time and provide real-time services. It is the long-term development direction of time keeping in the future. Aimed at the potential problems in the current time-keeping work, this project will research on the method of establishing and maintaining pulsar time, the method of combined time keeping of pulsar clock and atomic clock, the method of using pulsar clock to control atomic clock, and carry out combined time-keeping experiments by using the atomic clock time-keeping data from National Time Service Center, Chinese Academy of Sciences and the millisecond pulsar timing data of the 40-meter radio telescope at Haoping. The research results of this project can promote the application of pulsar time in time keeping. And it is possible to improve the long-term stability, reliability and autonomy of Chinese time benchmark, and solve the encountered card neck problem at the time of buying atomic clocks from foreign countries by making full use of the pulsar clock resources under the situation of our time-keeping atomic clocks relying on imports from abroad.