最小二乘配置方法确定局部大地水准面的研究

基金项目: 国家自然科学基金资助项目(40274004)

详细信息

A Local Geoid Determination Using Least-Squares Collocation

School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

摘要: 从最小二乘配置方法的原理出发,描述了最小二乘配置法中经验协方差函数的确定方法。在此基础上,以我国西部高山地区为例,利用实测点重力数据、30"×30"数值地面模型和EGM96地球重力场模型,确定了该地区2.5'×2.5'大地水准面。
- 最小二乘配置 /
- 大地水准面 /
- 协方差函数
Abstract: On the basis of the theory of least-squares collocation (LSC), the approach used to define a local covariance function is described.This paper selects a 6°×6°test area (30°N~36°N, 96°E~102° E)in western China, and carries out an experiment for local geoid determination by using LSC and combing terrestrial gravity data, 30"×30" digital terrain model and EGM96 geopotential model.The 2.5'×2.5' gridded geoid heights are obtained.
- least-squares collocation /
- geoid /
- covariance function