CALCULATION AND REVIEVL OF THE GEOMAGNETIC FIELD MODEL
Received date: 1992-06-08
Revised date: 1992-08-17
Online published: 1993-07-01
评述了计算地磁场区域模型的各种数学方法,如:利用多项式方法可以计算地磁场的Taylor多项式模型和Legendre多项式模型,利用球冠谐和分析方法可以计算出磁场的冠谐模型。本文指出了建立区域模型各种方法的优缺点,指出球冠谐和分析方法是计算地磁场三维模型的好方法。
关键词： 地磁场; 全球模型; 区域模型; Taylor多项式模型; Legendre多项式模型; 冠谐模型
安振昌 . 地磁场模型的计算和评述[J]. 地球科学进展, 1993 , 8(4) : 45 -48 . DOI: 10.11867/j.issn.1001-8166.1993.04.0045
In this paper, the various mathematical methods to calculate the regional magnetic field models were reviewed. International geomagnetic reference field (IGRF) is a global model of the geomagnetic field. By using the IGRF revised in 1991, 1945-1995 geomagnetic field over China can be calculated. Based on the polynomial method, the Taylor polynomial model and the Legendre polynomial model of the geomagnetic field can be derived. The spherical cap harmonic model of the geomagnetic field can be calculated by using the spherical cap harmonic analysis method.Each method has its advantages and ite limitations.The spherical cap harmonic analysis method is a good one to calculate the three dimensional model of the geomagnetic field.
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