标题： 基于中国空间站双频微波链路频率传递的引力势测定 显示英文标题

标题： Gravity potential determination based on China Space Station Dual-frequency microwave links frequency transfer

摘要： 中国空间站（CSS）目前在轨运行，并在其实验舱中携带了稳定度约为$2.0 \times 10^{-15} / \sqrt{\tau}$的高精度光学原子钟。 我们基于重力频率偏移方程开发了一种确定重力势（GP）的模型，并构建了高达$c^{-4}$的单向和双频传输模型。 这些模型考虑了对流层、电离层以及固体潮汐的影响。 所提出的模型适用于$10^{-19}$数量级的测量。 基于CSS任务，我们开展了模拟实验。 结果表明，当使用所提出的模型处理仿真频率信号时，我们可以分别得到截止仰角为$5^{\circ}$、$10^{\circ}$和$15^{\circ}$时精度分别为$ (1.13\pm0.71)\,\mathrm{m^2/s^2}$、$ (0.09\pm0.89)\,\mathrm{m^2/s^2}$和$(0.66\pm1.18)\,\mathrm{m^2/s^2}$的GP。借助CSS上的高精度光学原子钟，所提出的模型能够使我们以厘米级的精度测量GP差异。 显示英文摘要

摘要： The China Space Station (CSS) is currently in orbit and carries the high-precision optical atomic clock with stability of approximately $2.0 \times 10^{-15} / \sqrt{\tau}$ in its experiment module. We have developed a model to determine the gravity potential (GP) based on the gravity frequency shift equation and have created both one-way and dual-frequency transfer models up to $c^{-4}$. These models consider effects from the troposphere, ionosphere, and solid Earth tides. The proposed model is suitable for measurements at the magnitude of $10^{-19}$. Based on the CSS mission, we conducted the simulation experiments. The results indicate that when processing the simulation frequency signal using the proposed model, we can obtain the GP with the accuracies of $ (1.13\pm0.71)\,\mathrm{m^2/s^2}$, $ (0.09\pm0.89)\,\mathrm{m^2/s^2}$, and $(0.66\pm1.18)\,\mathrm{m^2/s^2}$ for cutoff elevation angles of $5^{\circ}$, $10^{\circ}$ and $15^{\circ}$, respectively. With the high-precision optical atomic clock onboard the CSS, the proposed model enables us to measure the GP differences in the magnitude of centimeter-level accuracy.