Abstract:Based on 2 074 known stations with actual measured velocities in Chinese mainland, we carry out the application research of velocity field in Chinese mainland in CGCS2000 coordinate conversion. We use different interpolation combination methods to fully consider the distance factor between unknown points and known velocity stations, so that the data of known velocity stations can be fully utilized. Compared with the calculations using velocity field grid model, the velocity accuracy of unknown points obtained by this method is improved substantially, and the accuracy of epoch conversion improves by up to 24.00 cm, 10.89 cm and 17.82 cm in X, Y and Z directions of the points, which is a guideline to improve the accuracy of epoch conversion using known velocity stations.
WANG Jianhong,LI Yongtao,MA Honglei. Research on the Application of Velocity Field in Chinese Mainland in CGCS2000 Coordinate Conversion[J]. jgg, 2022, 42(4): 398-402.