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2004年7月11日ACE卫星、Imagine卫星和TC-1卫星联合观测到伴随有持续尾向流的亚暴过程.TC-1卫星在近地磁尾晨侧观测到的磁尾亚暴过程有三个阶段:增长相过程(11:43~12:19),预膨胀过程(12:19~12:28)和偶极化过程.Imagine卫星在12:26观测到极光突然增亮;2min后偶极化过程发生.尾向流的持续时间约45min,经历了增长相和预膨胀相.随偶极化过程的发生,TC-1卫星进入等离子体片内观测到高速地向流.尾向流具有明显的高密、低温和沿磁场方向流动的特征,与Cluster等卫星在近地磁尾观测到的电离层上行离子流特征吻合.卫星的联合观测表明近地磁尾尾向流与南向行星际磁场密切相关,对亚暴过程有重要影响.
The combination of ACE satellite, Imagine satellite and TC-1 satellite on 11 July 2004 observed the sub-storm process accompanied by sustained tail-flow. There are three magnetospheric sub-storms observed on TC-1 (11: 43-12: 19), pre-expansion (12: 19-12: 28), and dipolarization, the sudden increase of auroral light observed at 12:26 by Imagine satellite and dipole The tailing flow takes place for about 45 min, and undergoes growth phase and pre-swelling phase. The TC-1 satellite enters the plasma slice to observe the high velocity flow with the dipolarization process. The tail flow has The obvious features of high density, low temperature and magnetic field flow coincide with the ionospheric upward ion current observed by Cluster and other satellites near the Earth’s magnetopause.The joint observations of the satellites show that the near-Earth magnetic tail-tailed flow is close to the south-facing interplanetary magnetic field Related, have a significant impact on the sub-storm process.