Accuracy of GPS Fiducial Station Coordiate and Velocity Field and Their Time Series

On the basis of the observations at GPS fiducial station of crustal movement monitoring network of China from 1999 to 2001, obtained by the result of global solutio and local solution, the changing tendency of GPS fiducial station coordinate and velocity field is anasolution, the changing tendency of GPS fiducial station coordinate and velocity field is analyzed.The statistical result of accuracy of GPS coordinate and velocity field is given.