Scaling in long term data sets of geomagnetic indices and solar wind ϵ as seen by WIND spacecraft
Scaling in long term data sets of geomagnetic indices and solar wind ϵ as seen by WIND spacecraft
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WIND 航天器看到的地磁指数和太阳风 ϵ 长期数据集的缩放
DOI：
10.1029/2003gl018209
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发表时间：
2003
影响因子：
5.2
通讯作者：
M. Freeman
中科院分区：
文献类型：
--
作者：
B. Hnat;S. Chapman;G. Rowlands;N. Watkins;M. Freeman
我们研究缩放的波动的地磁指数（AE，Au，和AL），提供了一个衡量磁层活动和的的ESTA参数，这是一个衡量太阳风驱动程序。广义结构函数（GSF）分析表明，当排除超过10个标准差的最极端波动时，波动表现出自相似缩放，对于Au指数约为1小时，对于AL，AE和AUG约为2小时。的标度指数的GSF被发现是相似的三个AE指数，并显着不同，从EAE。这是证实了直接比较他们的重新标度的概率密度函数。
We study scaling in fluctuations of the geomagnetic indices (AE, AU, and AL) that provide a measure of magnetospheric activity and of the ϵ parameter which is a measure of the solar wind driver. Generalized structure function (GSF) analysis shows that fluctuations exhibit self‐similar scaling up to about 1 hour for the AU index and about 2 hours for AL, AE and ϵ when the most extreme fluctuations over 10 standard deviations are excluded. The scaling exponents of the GSF are found to be similar for the three AE indices, and to differ significantly from that of ϵ. This is corroborated by direct comparison of their rescaled probability density functions.