摘要
为了用位理论对局域地磁场模型进行分析,对地磁数据的质量控制、数据的代表性、模型截止阶数的选择以及边界效应的影响等建模中的关键问题进行了研究,给出了分区建模的思想,并应用于某海域的地磁场建模中。矩谐分析方法与球冠谐和分析方法以及多项式拟合方法的比较结果证明,该方法在构建局域地磁场模型中具有较高的精度。
In order to analyze the local geomagnetic field model according to the potential theory, based on studying and analyzing the theories and method of rectangular harmonic analysis （RHA） for building local geomagnetic model, several key problems, such as quality control of geomagnetic data, the representness and resolution of data, the choice of truncation order of geomagnetic model and boundary effect and its elimination, are discussed. At the same time, a kind of idea for building model by subarea is presented and applied to an actual China marine region. The new method is compared with the method of spherical cap harmonic analaysis （SCHA） and Talyor ploynimial method. A conclusion is that RHA has high accuracy in building local marine geomagnetical model.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第2期82-87,共6页
Journal of Geodesy and Geodynamics
基金
国家863项目(2007AA12Z326)
关键词
局域地磁场建模
矩谐分析
模型截止阶数
分区建模
边界效应
local geomagnetic field model
rectanglar harmonic analysis （RHA）
truncation order of geomagnetic model
building model by subarea
boundary effect
