论文标题
一种同步两个原子钟的新方法
A novel method of synchronising two atomic clocks
论文作者
论文摘要
在本文中，我们提出了一种结合数字误差校正和相跟踪的原子时钟同步的新方法。微波广播用于测量一对原子钟之间的频率差异。我们使用这样一个事实，即对同步的原子钟会导致QPSK广播中的相误差，这可以高精度测量。该相误差的变化速率用于查找两个时钟提供的参考信号频率的相对误差，在10分钟的测量时间内，在1E-15 Hz的区域的不确定性。我们发现，可以使用该技术测量的基本稳定性为2.66e-17 Hz，使其有可能适用于将测量高度测量到厘米水平等应用。
In this paper we present a novel method of atomic clock synchronisation combining digital error correction and phase tracking. Microwave broadcasts are used to measure the difference in frequency between a pair of atomic clocks. We use the fact that desynchronised atomic clocks give rise to a phase error in a QPSK broadcast, which can be measured with high precision. The rate of change of this phase error is used to find the relative error in frequency of reference signals provided by two clocks, with an uncertainty in the region of 1e-15 Hz over a measurement time of 10 minutes. We find that the base stability that can be measured with this technique is 2.66e-17 Hz, making it potentially applicable to applications like measuring geodetic height to the centimeter level.
