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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Concerning the local time asymmetry of Pc5 wave power at the ground and field line resonance widths
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Concerning the local time asymmetry of Pc5 wave power at the ground and field line resonance widths

机译：关于Pc5波功率在地线和场线共振宽度处的局部时间不对称性

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A statistical analysis of transverse wave activity in the Pc 5 frequency band using satellite magnetic field data from a 6 month interval shows a symmetric distribution along the geostationary orbit in the magnetosphere, whereas observations on the ground display an asymmetric distribution with regard to the noon sector with maximum wave activity on the morningside. As a possible cause of these different local time variations of the wave activity, the ionospheric screening effect is discussed, which depends on the radial scale lengths or resonance width of the waves as well as on their azimuthal wave number. It is suggested in this study that a local time variation of the resonance width of the waves is caused by a variation of the radial gradient of the plasma density along the geostationary orbit, leading to a slowly varying efficiency of the ionospheric screening effect with local time. Local time variations of the resonance width thus will be of equal importance to explain the observed asymmetry as, for example, local time variations of wave sources causing local time variations of the azimuthal wave number. [References: 42]
机译：使用来自6个月间隔的卫星磁场数据对Pc 5频带中的横波活动进行统计分析，结果表明沿着磁层中的地球静止轨道对称分布，而在地面上的观测结果显示中午扇区不对称分布在早晨有最大的波浪活动。作为波活动的这些不同的局部时间变化的可能原因，讨论了电离层屏蔽效应，其取决于波的径向刻度长度或共振宽度以及其方位波数。在这项研究中建议，波的共振宽度的局部时间变化是由沿地球静止轨道的等离子体密度的径向梯度的变化引起的，从而导致电离层屏蔽效应的效率随局部时间而缓慢变化。 。因此，共振宽度的局部时间变化对于解释观察到的不对称性具有同等重要的意义，例如，由于波源的局部时间变化会引起方位波数的局部时间变化。 [参考：42]

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