On the quasi‐periodic nature of magnetopause flux transfer events
On the quasi‐periodic nature of magnetopause flux transfer events
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DOI：
10.1029/92ja02375
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发表时间：
1993-04
影响因子：
--
通讯作者：
M. Lockwood;M. Wild
中科院分区：
文献类型：
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作者：
M. Lockwood;M. Wild
讨论了在日侧磁层顶附近观测到的通量传递事件（FTEs）的复发率。ISEE卫星对磁层顶观测的调查表明，FTE信号间隔的分布具有3 min的模态值，但高度偏斜，上十分位值为1.5 min，下十分位值为18.5 min。平均值为8分钟，与以前的磁层顶数据调查一致。日侧极光电离层中准周期性事件的重复经常被用作与磁层顶fte相关的证据，如果要证实这种关联，它们的重复间隔分布应该与本文提出的分布相匹配。对行星际磁场1年15-s数据的调查表明，导出的分布可能是由行星际磁场Bz分量的波动引起的，而不是由磁层-电离层系统的自然振荡频率引起的。
The recurrence rate of flux transfer events (FTEs) observed near the dayside magnetopause is discussed. A survey of magnetopause observations by the ISEE satellites shows that the distribution of the intervals between FTE signatures has a mode value of 3 min, but is highly skewed, having upper and lower decile values of 1.5 min and 18.5 min, respectively. The mean value is found to be 8 min, consistent with previous surveys of magnetopause data. The recurrence of quasi-periodic events in the dayside auroral ionosphere is frequently used as evidence for an association with magnetopause FTEs, and the distribution of their repetition intervals should be matched to that presented here if such an association is to be confirmed. A survey of 1 year's 15-s data on the interplanetary magnetic field (IMF) suggests that the derived distribution could arise from fluctuations in the IMF Bz component, rather than from a natural oscillation frequency of the magnetosphere-ionosphere system.