2024/12/31 by Peng Fei Zhang, Chen Xiang Wang, Zhang, Peng Fei +15
Earth and Planetary Sciences · Engineering · Biochemistry, Genetics and Molecular Biology · #Geophysics and Gravity Measurements #GNSS positioning and interference #Geomagnetism and Paleomagnetism Studies
paper · pdf · doi:10.48550/arxiv.2501.00304
The China Space Station (CSS) is currently in orbit and carries the high-precision optical atomic clock with stability of approximately 2.0 × 10-15 / √τ 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±0.71) m2/s2, (0.09±0.89) m2/s2, and (0.66±1.18) m2/s2 for cutoff elevation angles of 5∘, 10∘ and 15∘, 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.