Journal
REMOTE SENSING
Volume 15, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/rs15123020
Keywords
relativistic geodesy; satellite frequency signal transmission; vertical height reference system; global vertical height datum unification
Ask authors/readers for more resources
The paper presents the SFST approach for connecting local VHSs, which aims to unify the global vertical height datum. This approach utilizes ultraprecise clock frequency signal links between satellites and ground stations to determine geopotential and height differences between ground datum stations. Simulation results show that the VHSs of China and the US can be unified with centimeter-level accuracy, given the stability of atomic clocks. The SFST approach shows promise for achieving IHRS and represents a new paradigm.
The International Association of Geodesy (IAG) aims to establish the International Height Reference System (IHRS) as one of its primary scientific objectives. Central to the realization of the IHRS is global vertical datum unification, which requires the connection of existing local vertical height reference systems (VHS) robustly and consistently. However, conventional methods are not suitable for estimating the offsets between two distant local height systems. In this paper, we propose a framework for connecting two local VHSs using ultraprecise clock frequency signal links between satellites and ground stations, referred to as the satellite frequency signal transmission (SFST) approach. The SFST approach allows for the direct determination of the geopotential and height differences between two ground datum stations without any location restrictions between the two VHSs. The simulation results show that the VHSs of China and the US can be unified with an accuracy of several centimeters, provided that the stability of atomic clocks used on-board the satellite and at on-ground datum locations reaches 4.8x10-17t-1/2 for an averaging time t (in seconds). We conclude that the SFST approach shows promise for achieving centimeter-level accuracy in unifying the global vertical height datum and represents a new paradigm for the realization of the IHRS.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available