论文标题
使用两个氢时钟通过CVSTT技术确定重力电势
Determining the gravity potential with the CVSTT technique using two hydrogen clocks
论文作者
论文摘要
根据一般相对论理论（GRT），通过比较两个不同站点的两个精确时钟之间的频率，由于重力频移效应，可以确定两个站点之间的重力电位（地球电位）差异。在这里，我们根据公共视图卫星时间传输（CVSTT）技术提供了基于两个远程氢原子时钟之间的频率比较的地球差异测定的实验结果。我们第一次将集合经验模式分解（EEMD）技术应用于CVSTT观测值，以有效地确定地球相关信号。基于两个不同时期的两个时钟之间的净频移，确定了北京203 Institute Laboratory（BIL）和Luojiashan Time-Quellquency Station（LTS）之间的地势差异。比较表明，由时钟比较确定的LT的正常测度高（OH）与由（38.5 $ \ pm $ 45.7）〜m确定的LTS偏离。结果与实验中使用的氢时钟的频率稳定性（在$ 10^{ - 15} $ 〜Day $^{ - 1} $的频率稳定性一致。使用更精确的原子时钟或光学时钟，将来可以有效地应用地测量的CVSTT方法。
According to general relativity theory (GRT), by comparing the frequencies between two precise clocks at two different stations, the gravity potential (geopotential) difference between the two stations can be determined due to the gravity frequency shift effect. Here, we provide experimental results of geopotential difference determination based on frequency comparisons between two remote hydrogen atomic clocks, with the help of common-view satellite time transfer (CVSTT) technique. For the first time we apply the ensemble empirical mode decomposition (EEMD) technique to the CVSTT observations for effectively determining the geopotential-related signals. Based on the net frequency shift between the two clocks in two different periods, the geopotential difference between stations of the Beijing 203 Institute Laboratory (BIL) and Luojiashan Time--Frequency Station (LTS) is determined. Comparisons show that the orthometric height (OH) of LTS determined by the clock comparison is deviated from that determined by the Earth gravity model EGM2008 by (38.5$\pm$45.7)~m. The results are consistent with the frequency stabilities of the hydrogen clocks (at the level of $10^{-15}$~day$^{-1}$) used in the experiment. Using more precise atomic or optical clocks, the CVSTT method for geopotential determination could be applied effectively and extensively in geodesy in the future.
