利用多面函数拟合和欧拉矢量法建立福建省GPS速度场模型

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

通过处理福建省卫星导航定位基准服务系统(FJCORS)2013-2015年观测资料,获得GPS站实测运动速度值,在此基础上,分别利用多面函数拟合法和欧拉矢量法构建了福建省及周边区域GPS速度场模型.内符合精度方面,多面函数拟合的速度精度南北分量为1.06 mm/a、东西分量为2.00 mm/a;欧拉矢量法得到的速度精度南北分量为1.36 mm/a、东西分量为1.22 mm/a.外符合精度方面,两种方法模拟得到的检核点速度值与实测速度值的较差均在±2.28 mm/a以内.在福建省陆域内,两种方法得到的速度场具有高度的一致性,运动速度均为35 mm/a左右,运动方向为SE-E向.

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.