组合GPS和VLBI数据建立板块运动模型

利用GPS和VLBI的组合数据,解算了北美、欧亚、太平洋等12板块之间的相对运动欧拉矢量,得到了实测的板块运动模型GVM1。与地学模型(NUVEL1A)的比较指出,GVM1大体上与地学模型一致;EURANOAM的极位置与NUVEL1A的相应极比较接近,旋转速率略微偏大;澳大利亚板块在最近几年内是稳定的;太平洋板块与其他板块对的极位置与地学模型较为接近,这表明多种技术的组合数据提高了板块运动模型建立的精确性和可靠性。

Establishment of Plate Motion Model by the Integrated Data of GPS and VLBI

This paper derives a plate motion model called GVM1 based on space geodesy techniques by the integrated data of GPS and VLBI. After selecting the proper stations of GPS and VLBI, establishes the plate motion model and unifies the reference frame of GPS and VLBI, resolves the relative Euler vector among plate north American, Eurasian, Pacific, south American and etc. Comparison between GVM1 and the geological plate motion model NUVEL-1A indicates that the plate motions from space geodetic observations are generally consistent with those from geological observations. The EURA-NOAM Euler pole from space geodetic observations is near to that of NUVEL-1A; the Australia plate has been steady in recent years; those stations located in the boundaries and joints could not represent the south American plate motion; the Pacific Euler pole relative to another plate pairs is consistent with the geological model, which indicates that the plate motion Euler vectors are improved greatly by the integrated data of GPS and VLBI.