论文标题

一种新的方法,可以从低纬度电离层中识别IMF $ b_y $从几乎抗原站的磁场变化的相关性上的影响

A novel method to identify IMF $B_y$ influence over low-latitude ionosphere from the correlation of magnetic field variations at nearly antipodal stations

论文作者

Chakraborty, Sumanjit, Chakrabarty, D.

论文摘要

这项工作旨在探索在地磁风暴期间在几乎几乎抗焦点位置的两个赤道/低纬度站点在两个赤道/低纬度站点的$δ$ x磁场组件之间的强度和一致相关性的功效。所考虑的反植物站是秘鲁经度部门和阿里巴格(Abg:abg:18.64 $^$ n Indial $ n Indial $ n Indial the Indial $ e gamocemention the the obg:abg; abg $ e^$ emagemention decogrication the pocripitian the;部门。本研究分析了2000 - 2005年期间的六次强烈地磁风暴事件,在太阳周期23的最大到线条阶段下降。这些电台是Supermag网络的一部分,这些电台的数据公开可用。值得注意的是,尽管这两个站点上的$δ$ x变化通常是不相关的,但在某些情况下会观察到显着的相关性。 10分钟的相关系数至少为75 $ \%$ $ $ $ $ $ $ $ $ $ $ $ $ $ \%$定义为推断这两个站点上$δ$ x变化之间可能连接的必要标准。超级darn网络的电离层对流图还用于理解在这些观测时期,高贴层上两细胞电离层对流模式的时空演化。这项练习表明,当两单元对流图显示适当的旋转,并且两个站点都可能位于单个单元格下时,反物位置上的$δ$ x变化显着相关。因此,这项调查提出了一种新的方法,可以根据公开可用的数据识别低/赤道纬度的IMF $ b_y $影响。

This work is directed to explore the efficacy of strong and consistent correlations between the $Δ$X component of magnetic field at two equatorial/low-latitude stations at nearly antipodal locations during geomagnetic storms. The antipodal stations considered are Huancayo (HUA: 12.06$^\circ$S, 75.21$^\circ$W geographic; magnetic dip 0.3$^\circ$N) in the Peruvian longitude sector and Alibag (ABG: 18.64$^\circ$N, 72.87$^\circ$E geographic; magnetic dip 10$^\circ$N) in the Indian longitude sector. Six strong geomagnetic storm events during the period 2000-2005, falling in the maximum-to-declining phase of solar cycle 23, are analyzed for this study. These stations are part of the SuperMAG network and data from these stations are openly available. It is noted that although $Δ$X variations over these two stations are, in general, uncorrelated, significant correlations are observed on certain occasions. Correlation coefficient of at least 75$\%$ for 10 minutes is defined as a requisite criterion to infer the possible connection between the $Δ$X variations over these two stations. The ionospheric convection maps from the SuperDARN network are also used to understand the Spatio-temporal evolution of the two-cell ionospheric convection patterns over high-latitudes during these periods of observations. This exercise reveals that the $Δ$X variations over the antipodal locations are significantly correlated when the two-cell convection maps show appropriate rotations and both the stations possibly come under the single cell. Therefore, this investigation brings out a novel method to identify the IMF $B_y$ influence over the low/equatorial latitudes based on the openly available data.

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