标题： 毫秒脉冲星测时在钟组长期稳定性中的应用 显示英文标题

标题： Application of Millisecond Pulsar Timing to the Long-Term Stability of Clock Ensembles

摘要： 地基时间尺度由于原子钟的物理限制而显示出不稳定性。 更严格的环境隔离以及增加改进型铯原子钟和腔调谐氢原子频标的数量，使时间尺度的精度提高了大约五倍。 使用不同的时钟组合会导致某些毫秒脉冲星计时数据发生可测量的变化。 我们研究了毫秒脉冲星可能用于定义精确的长期时间标准和近惯性参考框架中的位置参考系统的应用。 尽管两项最长研究的毫秒脉冲星对地基时间尺度的定量贡献似乎很小，但它们可能作为独立的标准，在识别由于地基时钟有限寿命和共同参考框架而难以检测到的误差源方面证明是有用的。 随着当前全球脉冲星搜索工作的开展，可能会发现一些新的毫秒脉冲星，或许其中一些具有更好的计时特性。 显示英文摘要

摘要： Terrestrial timescales show instabilities due to the physical limitations of the atomic clocks. Stricter environmental isolation and increased numbers of improved cesium clocks and cavity-tuned hydrogen masers have resulted in time scales more accurate by a factor of about five. The use of different clock ensembles results in measurable changes in some millisecond pulsar timing data. We investigate the possible application of millisecond pulsars to define a precise long-term time standard and positional reference system in a nearly inertial reference frame. Although possible quantitative contribution of the two longest studied millisecond pulsars to terrestrial timescales appears minimal, they may prove useful as independent standards in identifying error sources that are difficult to detect due to the finite lifetime and common reference frame of terrestrial clocks. New millisecond pulsars, perhaps some with even better timing properties, may be discovered as a result of the current global pulsar search efforts.