Ocean Loading Tides Corrections of GPS Stations in Antarctica

The ocean loading tides corrections of GPS stations in Antarctica are described. Based on the theory of ocean loading tides, the displacement corrections of ocean loading tides on GPS stations in Antarctica are computed with CRS4.0 model. These corrections are also applied to GPS data processing. The GPS data are analyzed by the GAMIT software with and without these corrections. The authors compare and analyze the GPS baseline components to get the differences. The results show that the ocean tidal displacement corrections have obvious effects upon GPS baseline components. Therefore, we should not ignore the ocean loading tides corrections of GPS stations in Antarctica to obtain precise and reliable results.