Determining the height difference between two points using optical clocks, an experiment in Wuhan
DOI:
https://doi.org/10.5281/1sptca07Keywords:
relativistic geodesy, orthometric height, optical clock, frequency comparisonAbstract
The applications of relativistic geodesy are increasingly being studied and exploited by scientists. Many studies on relativistic geodesy have obtained very positive results in measurement fields requiring high accuracy such as satellite geodesy, space geodesy, gravity geodesy, etc. This study presents the results of an experiment on determining the height difference between two points by comparing the frequencies of two optical atomic clocks, in Wuhan, China. The experiment results showed that the difference between the height difference determined by the clock frequency comparison method and the height difference determined by the leveling method was at the centimeter level.
Downloads
References
US Department of Commerce, NOAA; US Department of Commerce, NOAA. "National
Geodetic Survey - Home". www.ngs.noaa.gov. Retrieved 2020-09-07.
Phạm Hoàng Lân, Bùi Quang Tuyền, “Thêm một thể nghiệm đo cao GPS đạt độ chính xác thủy chuẩn hạng III Nhà nước ở Việt Nam”, Tạp chí khoa học đo đạc và bản đồ, số 4, trang 9-13, 2010.
A. Einstein, “Die Feldgleichungen der Gravitation”, in Sitzungsberichte der Königlich Preußischen Akademie der Wissenschaften. Berlin, Germany, pp. 844–847, 1915.
A. Bjerhammar, “On a relativistic geodesy”, Bull. Géodésique, vol. 59, no. 3, pp. 207–220, Sep. 1985.
W. Shen, D. Chao, and B. Jin, “Determination of the geopotential and orthometric height based on frequency shift equation”, Natural Sci., vol. 3, no. 5, pp. 388–396, 2011.
Hoàng Anh Thế, Nguyễn Quang Phúc, "Xác định độ cao chính bằng tín hiệu GPS dựa trên thuyết tương đối rộng," Tuyển tập báo cáo khoa học Hội nghị khoa học địa chất biển lần thứ 3, 2019.
C. Lisdat et al., “A clock network for geodesy and fundamental science”, Nature Commun., vol. 7, p. 12443, Aug. 2016.
J. Grotti et al., “Geodesy and metrology with a transportable optical clock”, Nature Phys., vol. 14, no. 5, pp. 437–441, May 2018.
H. Yao, Z. Baolin, and Z. T. Mengyan, “Liquid nitrogen-cooled Ca+ optical clock with systematic uncertainty of 3 × 10-18”, Phys. Rev. Appl., vol. 17, no. 3, Mar. 2022.
M. Takamoto, I. Ushijima, N. Ohmae, T. Yahagi, K. Kokado, H. Shinkai, and H. Katori, “Test of general relativity by a pair of transportable optical lattice clocks”, Nature Photon., vol. 14, pp. 411–415, Apr. 2020.
H. Yao et al. “Geopotential measurement with a robust, transportable Ca+ optical clock”, Phys. Rev. A, 102, 050802, 2020.
A. T. Hoang, Z. Shen, W. Shen, C. Cai, W. Xu, A. Ning, and Y. Wu, “Determination of the orthometric height difference based on optical fiber frequency transfer technique”, Geodesy Geodyn., vol. 12, no. 6, pp. 405–412, Nov. 2021.
B. Hofmann-Wellenhof and H. Moritz, Physical Geodesy. Cham, Switzerland: Springer, 2005.
K.C. Wu, et al.. A preliminary experiment of determining the geopotential difference using two hydrogen atomic clocks and TWSTFT technique. J. Geod. Geodyn, 11, 229–241. 2020.
Z.H. Wu, N.E. Huang. “Ensemble empirical mode decomposition: A noise-assisted data analysis method”, Adv. Adapt. Data Anal., 1, 1–41, 2009
N.E. Huang, Z.H. Wu. “A review on Hilbert-Huang transform: Method and its applications to geophysical studies”. Rev. Geophys, 46, RG2006, 2008.
[17] S. Gasi. A new ensemble empirical mode decomposition (EEMD) denoising method for
seismic signals. Energy Procedia, 97, 84–91, 2016.
Downloads
Published
Issue
Section
License

This work is licensed under a Creative Commons Attribution 4.0 International License.
CC 4.0