Estimation of Geopotential Value W0 for the Geoid and Local Vertical Datum Parameters

Unification of the global vertical datum has been a key problem to be solved for geodesy over long period, and main challenge unifying system is determine geopotential value W0 geoid calculate offset between local W0. The can calculated using grid mean sea surface (GMSS) data model (GGM). In this study, GMSS was measured with adjustment methods 24 years merged multi-satellite altimetry data. HaiYang-2A (HY-2A) Jason-3 were first used determined 62,636,856.82 m2s−2 by combining EIGEN-6C4 (European Improved Gravity Model Earth New Techniques) Then, difference approach geodetic boundary (GBVP) parameters in study. To compensate omission error GGM, study utilized remove–compute–restore (RCR) technique residual terrain (RTM)-recovered high-frequency gravity signals. Finally, as result GBVP solution, Australian Height Datum (AHD) 62,636,851.935 m2s−2, AHD relative 0.4885 m. As approach, Chinese 62636861.412 −0.4592