A flux transfer event observed at the magnetopause by the Equator-S spacecraft and in the ionosphere by the CUTLASS HF radar
A flux transfer event observed at the magnetopause by the Equator-S spacecraft and in the ionosphere by the CUTLASS HF radar
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DOI：
10.1007/s00585-999-0707-z
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发表时间：
1999-06
影响因子：
1.9
通讯作者：
D. Neudegg;T. Yeoman;S. Cowley;G. Provan;G. Haerendel;Wolfgang Baumjohann;U. Auster;K. Fornacon;E. Georgescu;C. Owen
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文献类型：
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作者：
D. Neudegg;T. Yeoman;S. Cowley;G. Provan;G. Haerendel;Wolfgang Baumjohann;U. Auster;K. Fornacon;E. Georgescu;C. Owen
一个通量转移事件（FTE）的观测同时进行了赤道-S航天器附近的向阳面磁层顶，而相应的瞬态等离子体流被认为是在近共轭极电离层的CUTLASS芬兰高频雷达。在FTE发生之前，在太阳风中地球上游~226 RE的WIND航天器上的磁力计探测到行星际磁场（IMF）向南转向，估计在~77分钟后到达太阳下磁层顶。不久之后，赤道-S磁强计在垂直于磁层顶的磁场分量中观测到一个典型的双极FTE特征，就在磁层内部。几乎与此同时，芬兰CUTLASS雷达在磁纬78°和83°之间的F区等离子体中观测到一个强瞬态流，该区域靠近电离层区域，预计将沿沿着地磁场线映射到航天器。流签名（和数据集作为一个整体）被认为是完全一致的，认为FTE是由磁层顶重联爆发形成的。关键词行星际物理学（电离层磁层相互作用）·磁层物理学（磁层顶·尖点·和边界层;太阳风磁层相互作用）
Observations of a flux transfer event (FTE) have been made simultaneously by the Equator-S spacecraft near the dayside magnetopause whilst corresponding transient plasma flows were seen in the near-conjugate polar ionosphere by the CUTLASS Finland HF radar. Prior to the occurrence of the FTE, the magnetometer on the WIND spacecraft ~226 REupstream of the Earth in the solar wind detected a southward turning of the interplanetary magnetic field (IMF) which is estimated to have reached the subsolar magnetopause ~77 min later. Shortly afterwards the Equator-S magnetometer observed a typical bipolar FTE signature in the magnetic field component normal to the magnetopause, just inside the magnetosphere. Almost simultaneously the CUTLASS Finland radar observed a strong transient flow in the F region plasma between 78° and 83° magnetic latitude, near the ionospheric region predicted to map along geomagnetic field lines to the spacecraft. The flow signature (and the data set as a whole) is found to be fully consistent with the view that the FTE was formed by a burst of magnetopause reconnection.Key words.Interplanetary physics (ionosphere-magnetosphere interaction) · Magnetospheric physics (magnetopause · cusp · and boundary layers; solar wind-magnetosphere interactions)