| 地磁场模型和冠谐分析 |
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| 引用本文： | 安振昌.地磁场模型和冠谐分析[J].地球物理学进展,1992(3). |
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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 北京 |
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| 摘 要： | 地磁场是由内源场(地核场和地壳场)和外源场(电离层场和磁层场)组成的,地磁场模型是表示地磁场时空分布的数学表达式.本文简述了地磁场全球模型和区域模型的计算方法和应用;评述了冠谐分析方法及其在地磁学中的应用;介绍了地磁场模型误差的主要来源.
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| 关 键 词： | 冠谐分析 地磁场模型 地磁场 长期变化 磁异常 |
GEOMAGNETIC FIELD MODELS AND SPHERICAL CAP HARMONIC ANALYSIS |
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| An Zhenchang.GEOMAGNETIC FIELD MODELS AND SPHERICAL CAP HARMONIC ANALYSIS[J].Progress in Geophysics,1992(3). |
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| Authors: | An Zhenchang |
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| Abstract: | The geomagnetic fields consist of the internal source fields (core field and crust field) and external source fields (ionospheric field and magnetospheric field). The geomagnetic field model expresses the space-time distribution of the main field and its secular variation. In this paper, the calculation methods and applications of the global and regional models of the geomagnetic field were in troduced briefly. The spherical cap harmonic analysis method and its applications in geomagnetism were reviewed. The main error sources in the geomagnetic field model were introduced, too. |
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| Keywords: | Spherical cap harmonic analysis Geomagnetic field model Main geomagnetic field Secular variation Magnetic anomaly |
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