| 非径向地磁力线对计算电离层电场及三维电流系的部分影响 |
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| 引用本文： | 古士芬,田葆宁,宋利.非径向地磁力线对计算电离层电场及三维电流系的部分影响[J].空间科学学报,1986,6(2):102-111. |
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| 作者姓名： | 古士芬 田葆宁 宋利 |
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| 作者单位： | 中国科学院空间物理研究所 |
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| 摘 要： | 本文对Kamide等人的由地面磁变化计算电离层电场、电流及场向电流的方法做了改进。给出了计入非径向地磁力线对电离层电导率影响下的电位φ的二阶偏微分方程。通过实例计算考查了由地面磁资料计算电离层电场、电流及场向电流中地磁力线非径向性的部分效应。结果表明,即使在高纬极光区,这部分效应也是重要的、不能忽视的;此外,计入这一效应使得计算量明显减少。
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| 收稿时间： | 1985-04-15 |
Effects of Non-radial Geomagnetic Field Lines on Evaluating Ionospheric Fields and Three-dimensional Current System from Ground Magnetic Data |
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| Affiliation: | Institute of Space Physics, Academia Sinica |
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| Abstract: | Some improvements are made to the method developed by Kamide (KRM method) in evaluating ionospheric electric field, current and field-aligned currents from ground variations. Taking into account the effects of non-radial geomagnetic field lines on the ionospheric conductivity, a second-order partial differential equation for electric potential is rederived, which will come back to the original form of Kamide's equation when inclination equals to 90°.To show the effects of this improvement, an example is given and the results show a considerable effect of the non-radial field lines even in high latitude auroral regions. At magnetic latitude 67°, the correction by the improvement can be up to 21% for ionospheric current, and up to 10% (4kV) for electric potential. Finally, in this example, the rate of convergence in the iterative procedure increases, too, from 300 times to only 202 times. |
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