The ocean tidal displacement corrections for Earth Crust Movement Network of China

Abstract

Using the CSR4.0 global ocean tidal model and the local ocean tidal maps of China Seas, we calculated the ocean tidal displacement corrections for the Earth Crust Movement Network of China. We also discuss the effect on the corrections caused by the tidal model and Green's function. As an actual example, we used the GPS observational data to estimate the influence of ocean loading tides on the GPS baseline vectors. Our results show that the corrections of ocean loading tide for the site displacement of geodetic stations and the variation of GPS baseline vector may reach maximum values of about 2 cm and 2 mm, respectively.