EGU2020-3388
https://doi.org/10.5194/egusphere-egu2020-3388
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Experiments of determining the geopotential difference using two hydrogen atomic clocks and two-way satellite time and frequency transfer technique

An Ning1, Kuangchao Wu1, Wen-Bin Shen1,2, Ziyu Shen3, Chenghui Cai1, and Xiao Sun1
An Ning et al.
  • 1Wuhan University, surveying and mapping, Wuhan, China (ning_an@126.com)
  • 2State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing Wuhan university
  • 3Hubei University of Science and Technology, Xianning, Hubei, China

Abstract In this study, we carried out experiments of the geopotential difference determination at CASIC, Beijing with the help of two hydrogen atomic clocks, using the two-way satellite time and frequency transfe technique. Here the ensemble empirical mode decomposition method is adopted to extract geopotential-related time-elapse signals from the original observations. The clock-comparison-determined geopotential difference in the experiments is determined, which is compared to the previously known results determined by conventional approach. Results show that the geopotential difference determined by time comparison deviates from that determined by conventional approach by about 1589 m2s-2, which is equivalent to 162 m in height, in consistence with the stability of the hydrogen atomic clocks applied in the experiments (at the level of 10-15/day). Since the stability of the optical clocks achieve 10-18 level, the geopotential determination by accurate clocks is prospective, and it is prospective to realize the unification of the world vertical height system. This study is supported by NSFCs (grant Nos. 41721003, 41631072, 41874023, 41804012, 41429401, 41574007) and Natural Science Foundation of Hubei Province of China (grant No. 2019CFB611).

How to cite: Ning, A., Wu, K., Shen, W.-B., Shen, Z., Cai, C., and Sun, X.: Experiments of determining the geopotential difference using two hydrogen atomic clocks and two-way satellite time and frequency transfer technique, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3388, https://doi.org/10.5194/egusphere-egu2020-3388, 2020

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