| 中国及邻近地区地磁场垂直梯度的计算与研究 |
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| 引用本文： | 安振昌 王月华. 中国及邻近地区地磁场垂直梯度的计算与研究[J]. 空间科学学报, 1991, 11(1): 14-23 |
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| 作者姓名： | 安振昌 王月华 |
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| 作者单位： | 中国科学院地球物理研究所(安振昌，王月华)，中国科学院地球物理研究所(徐元芳) |
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| 摘 要： | 根据地磁场的球谐模型,推导出地磁场各个分量垂直梯度的球谐表达式.计算出中国及邻近地区高度为0km,50km和100km处的地磁场及其垂直梯度的网点值,编绘出地磁总强度、垂直强度、水平强度和磁偏角的垂直梯度等值线图.研究了地磁场垂直梯度在地面上以及随高度的变化规律.
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| 关 键 词： | 地磁场 球谐模型 垂直梯度 |
CALCULATIONS AND ANALYSES OF VERTICAL GRADIENT OF THE GEOMAGNETIC FIELD IN CHINA AND ADJACENT AREAS |
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| An Zhen-chang Wang Yue-hua Xu Yuan-fang. CALCULATIONS AND ANALYSES OF VERTICAL GRADIENT OF THE GEOMAGNETIC FIELD IN CHINA AND ADJACENT AREAS[J]. Chinese Journal of Space Science, 1991, 11(1): 14-23 |
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| Authors: | An Zhen-chang Wang Yue-hua Xu Yuan-fang |
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| Abstract: | In this paper, based on the spherical harmonic model of the geomagnetic field, the spherical harmonic expressions of the vertical gradient of the geomagnetic field are given. The grid values of the geomagnetic field and its vertical gradient at 0.50, 100km above sea level are calculated. The contour maps of the vertical gradient of total intensity, vertical intensity, horizontal intensity and declination are drawn. The geographical distribution and change with height of the vertical gradient of the geomagnetic field are analysed. |
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| Keywords: | Spherical harmonic model of the geomagnetic field Vertical gradient Contour map China |
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