Establishment of GPS velocity field models of Fujian province by using multi-surface function fitting and Euler vector methods

By processing data of Fujian continuously operating reference station (FJCORS) from 2013 to 2015, the observed velocity of GPS station is obtained. On this basis, the GPS velocity field models of Fujian province and the surrounding areas are established by using multi-surface function fitting method and Euler vector method respectively. The precision of velocity obtained by using multi-surface function fitting is 1.06 mm／a for north-south component and 2.00 mm／a for east-west component, while the precision of velocity obtained by using Euler vector method is 1.36 mm／a for north-south component and 1.22 mm／a for east-west component. Meanwhile, the differences between the modeled velocity value and the observed velocity value obtained by using the two methods for the check stations are mainly within ±2.28 mm／a. In the terrestrial region of Fujian province, the velocity field obtained by the two methods has highly good consistency, the velocity values are about 35 mm／a, and the motion direction is SE-E.