| 地磁场H和Z分量月均值的频谱分析 |
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| 引用本文： | 康国发. 地磁场H和Z分量月均值的频谱分析[J]. 云南大学学报(自然科学版), 1990, 12(1): 88-92 |
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| 作者姓名： | 康国发 |
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| 作者单位： | 云南大学地球科学系 |
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| 摘 要： | 利用我国北京、佘山、兰州和拉萨四个地磁台的水平和垂直分量月均值资料,借助快速付里叶变换方法,分别计算出水平和垂直分量的扰日、通日、静日和静日午夜值的振幅谱,分析比较了这些分量的频谱特征并得出了它们的周期变化规律。
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| 关 键 词： | 地磁场 快速付里叶变换 振幅谱 地磁长期变化 |
Spectral Analysis for Monthly Means of Geomagnetic H-Com-ponent and Z-Component |
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| Kang Guofa. Spectral Analysis for Monthly Means of Geomagnetic H-Com-ponent and Z-Component[J]. Journal of Yunnan University(Natural Sciences), 1990, 12(1): 88-92 |
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| Authors: | Kang Guofa |
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| Abstract: | The monthly means for H-component and Z-component are analyzed by means of the Fast Fourier Transform (FFT). The data were selected from the four observatories of Beijing, Lanzhou, Sheshan and Lasa. The amplitudes spectrum of disturbed days, all days, quiet days and the quiet midnight values for the four observatories H-component and Z-component are calculated. The general features of periodic variations for four observatories had been obtained by means of comparison the spectral component amplitudes. |
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| Keywords: | geomagnetic field FFT amplitude spectra geomagnetic secular change. |
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