利用局域欧拉矢量法建立CGCS2000速度场模型

Velocity Field Model of CGCS2000 Based on Euler Vector of Local Area

摘要: 提出了利用局域欧拉矢量法建立CGCS2000速度场模型,并且给出确定局部区域点的方法———移动窗口法。首先利用GAMIT/GLOBK软件对“中国地壳运动观测网络工程”(简称“网络工程”)约1 070个参考站近10a观测数据重新处理,再进行一元线性回归分析,获得该“网络工程”的速度场;然后利用提出的局域欧拉矢量法对速度场建模,给出了确定局部区域点的移动窗口法的基本原理和具体步骤,并且通过计算对这种方法确定的速度精度进行了分析和比较;最后利用该模型获得CGCS2000其余约1 400个参考站的速度。

Abstract: In this paper,a method based on Euler vector of local area is presented to construct the model of velocity field,and the method of determining the local area stations-moving window is presented.Firstly,through processing the Crustal Movement Observational Network of China(CMONC) data of ten years by GAMIT/GLOBK and linear regression,the velocities of 1 070 CMONC stations are achieved.Secondly,the model of velocity field is constructed by the new method and the velocities of 1 070 CMONC stations,and the corresponding principles and steps of moving window are presented.Finally,the velocity precision of the new method is compared and analyzed by the actual calculation.The velocities of the remaining 1 400 points of CGCS2000 are obtained by the velocity field model.