| 地磁场模型的计算和评述 |
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| 引用本文： | 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. |
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| 作者姓名： | 安振昌 |
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| 作者单位： | 中国科学院地球物理研究所 100101 |
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| 摘 要： | 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。
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| 关 键 词： | 地磁场 全球模型 区域模型 计算 |
CALCULATION AND REVIEVL OF THE GEOMAGNETIC FIELD MODEL |
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| An Zhenchang.CALCULATION AND REVIEVL OF THE GEOMAGNETIC FIELD MODEL[J].Advance in Earth Sciences,1993,8(4):45-48. |
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| Authors: | An Zhenchang |
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| Institution: | Institute of Geophysics; Chinese Academy of Sciences; Beijing 100101 |
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| Abstract: | 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 its 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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| Keywords: | global model regionnal model Taylor polynomial model Legendre polynomial model Legendre polynomial model |
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