2023/06/27 by Lei Wang, Wang, Lei, Wei Xu +15
Decision Sciences · Engineering · Physics and Astronomy · #86-05 #Advanced Frequency and Time Standards #FOS: Physical sciences #Geophysics (physics.geo-ph) #Geophysics and Sensor Technology #Scientific Measurement and Uncertainty Evaluation
paper · pdf · doi:10.48550/arxiv.2306.15184
openalex publication_date 2023/06/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
According to the general relativity theory, the geopotential difference can be determined by gravity frequency shift between two clocks. Here we report on the experiments to determine the geopotential difference between two remote sites by hydrogen masers based on precise point positioning time-frequency transfer technique. The experiments include the remote clock comparison and the local clock comparison using two CH1-95 active hydrogen masers linked with global navigation satellite system time-frequency receivers. The frequency difference between two hydrogen masers at two sites is derived from the time difference series resolved by the above-mentioned technique. Considering the local clock comparison as calibration, the determined geopotential difference by our experiments is 12,142.3 (112.4) m2/s2, quite close to the value 12,153.3 (2.3) m2/s2 computed by the EIGEN-6C4 model. Results show that the proposed approach here for determining geopotential difference is feasible, operable, and promising for applications in various fields.