A High Precision Tidal Model Based on Multisource Tidal Harmonic Constants for Offshore China

Abstract As the accuracy of analytical instruments improve, ocean tide load displacement (OTLD) in geodesy and dynamics is becoming increasingly demanding. The method integrating through Green’s function using model main means OTLD correction. However, although different tidal models have high open regions, they are less precise practical offshore areas China, making it difficult to correct OTLDs accurately complicated coastline China. In this work, we evaluate 13 construct a new model, new.chinasea.2022, based on combination high-precision harmonic parameters. correction efficiency new.chinasea.2022 conventional was assessed by wRMS analysis GPS coordinate time series from Crustal Movement Observation Network China (CMONOC). It turns out that (1) newly released performs better than old there differences performance for each constituent seas; (2) performed region improving FES2004 1%-12% osu.chinasea.2010 1%-6.5%.