Experiments of determining geopotential difference between two remote sites by 
satellite common-view time-frequency transfer

Wu, Kuangchao; Shen, Ziyu; Xu, Wei; Li, Lihong; Ning, An; Wang, Lei; Zhang, Pengfei; Xu, Rui; Xie, Youchao; Cheng, Peng; Sun, Xiao; Cai, Chenghui; Wu, Yifan; Luan, Wei; Guo, Jiachun; Zhang, Tengxu; Shen, Wenbin

doi:10.57757/IUGG23-3147

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Experiments of determining geopotential difference between two remote sites by satellite common-view time-frequency transfer

Authors

Wu, Kuangchao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shen, Ziyu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Xu, Wei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Li, Lihong
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ning, An
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wang, Lei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang, Pengfei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Xu, Rui
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Xie, Youchao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Cheng, Peng
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Sun, Xiao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Cai, Chenghui
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wu, Yifan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Luan, Wei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Guo, Jiachun
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang, Tengxu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shen, Wenbin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Wu, K., Shen, Z., Xu, W., Li, L., Ning, A., Wang, L., Zhang, P., Xu, R., Xie, Y., Cheng, P., Sun, X., Cai, C., Wu, Y., Luan, W., Guo, J., Zhang, T., Shen, W. (2023): Experiments of determining geopotential difference between two remote sites by satellite common-view time-frequency transfer, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3147

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020596

Abstract

Here we report an experiment of measuring the geopotential difference between two stations separated with a 1240 m height difference by comparing two hydrogen atomic clocks’ frequencies via a satellite common view time-frequency transfer approach. After comparing the two clocks at one station for calibration, one of the two clocks was transported to another station and continued the clock comparison. By this way, we determined the gravity frequency shift and consequently, the geopotential difference between the two remote sites. The experiment result deviates from that determined by the Earth gravity model EIGEN-6C4 by 8.9 (24.6) m²/s². This study provides a prospective way to directly measure the geopotential difference between two remote sites using precise atomic clocks based on satellite links. This study is supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 42030105, 41721003, 42274011), Space Station Project (2020)228, and Fundamental Research Funds for the Central Universities (2022).