摘要
在区域地壳运动研究中,拟合推估模型兼具函数模型的趋势性和统计模型的灵活性特点,经常用于推估未经观测又需要关注的形变点,然而,拟合推估模型的协方差阵的精确确定制约着其解算精度。在分析几种常用的协方差函数的特点的基础上,提出了基于移动原理的拟合推估模型。实例验证,该方法的推估精度明显高于常规的拟合推估模型。
For the research on regional crustal movement,collocation model is always used to estimate the points which need attention without observation.However,because of its tendency characteristics of function model and its active characteristics of statistic model,accurate covariance matrix of the model is hard to be determined.This paper has analyzed and compared some popular covariance function,then brought up a new collocation model based on displacement principle.The new model can build up different collocation model aiming at different points,thus many avoid the accuracy loss of using experiential covariance function.The accuracy of the new model is apparently higher than normal collocation model through special verification.
出处
《大地测量与地球动力学》
CSCD
北大核心
2012年第5期33-36,共4页
Journal of Geodesy and Geodynamics
关键词
移动原理
拟合推估
地壳运动
速率场
协方差函数
displacement principle
collocation
crustal movement
velocity field
plate movement
covariance function
