基于移动原理的拟合推估模型建立区域地壳运动速率场  

ESTABLISHING REGIONAL CRUSTAL MOVEMENT VELOCITY FIELD WITH COLLOCATION MODEL BASED ON DISPLACEMENT PRINCIPLE

作　　者：李冲[1,2] 李建成[1] 瞿伟[3] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]四川省测绘产品质量监督检验站,成都610041 [3]长安大学地质工程与测绘工程学院,西安710054

出　　处：《大地测量与地球动力学》2012年第5期33-36,共4页Journal of Geodesy and Geodynamics

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.

关 键 词：移动原理 拟合推估 地壳运动 速率场 协方差函数 

分 类 号：P207[天文地球—测绘科学与技术]