摘要
在分析局部重力场最小二乘配置法技术特点的基础上,推导出一种能综合多种类型、不同高度重力场元经验协方差函数的通用表达方法,以期实现局部重力场元的内插、外推、延拓或其他不同高度的重力场元估计一体化。分析了最小二乘配置技术的一些性能以及算法实现中应注意的问题。
On the basis of simply analyzing technical characters of least squares collocation, a general expression of experiential covariance function is put forward, which is identic for many gravity field variables of different types and above different heights. With the general expression, we can construct the same arithmetic for interpolation, extrapolation and continuation of local gravity field variables and estimation of different heights of theirs. Some arithmetic characters of least squares collocation are a analyzed and some problems are noted in arithmetic realization through testing. It is indicate that the resolution of inverse covariance matrix is not a key problem at all and the main mission is to study more efficient, more exact experiential covariance function for least squares collocation in local gravity field.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2007年第5期431-434,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40274003)。
关键词
最小二乘配置
局部重力场
协方差函数
least square collocation
local gravity field
covariance function
作者简介
章传银，研究员，主要从事大地测量与地球重力场研究。E-mail：zhangchy@casm．ac．cn
