最小二乘配置与REHSM求解GPS应变场的方法

首先在最小二乘配置方法中,通过多项式函数、高斯函数、似高斯函数、希尔沃宁函数、空间调和函数(2个)共6种协方差拟合函数,在WGS-84椭球面上比较获得最优的区域速度场信息。然后在研究区域进行划分与编码,通过块体的整体旋转及均匀应变模型(REHSM)解算得到应变场。最后对运城盆地2007~2010年19个基于"数字地震网络工程"的监测数据进行分析,给出该区域的应变场分布。

The Application and Method of GPS Strain Field Using the Least Square Collocation and REHSM

Firstly, in the least square collocation, we get the preferable regional velocity field based on WGS-84 ellipsoid from the polynomial function, the Gaussian function, the homo-Gaussian function, the Hirvonen function, the space harmonic functions (two), and six different kinds of covariance function. Then, through the better method, we get the GPS strain field of the study area by using rotation in the entire block and homogeneous strain model (REHSM). Eventually, we analyzed the 19 GPS sites based on the “digital seismic network project’s” 2007-2010 GPS monitoring data in the Yuncheng basin.