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.
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.
出处
《地球物理学进展》
CSCD
1992年第3期73-80,共8页
Progress in Geophysics
基金
国家自然科学基金
关键词
冠谐分析
地磁场模型
地磁场
长期变化
磁异常
Spherical cap harmonic analysis
Geomagnetic field model
Main geomagnetic field
Secular variation
Magnetic anomaly
