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本文利用星簇Cluster的三颗卫星(C1,C3和C4)在2001年和2002年的数据,研究了快速对流事件(RCE,Rapid Convection Event)及其与亚暴的关系.结果显示单点卫星对RCE的观测,不能反映磁尾RCE的真实情况.在2002年7月25日发生的一次RCE事件,C1和C3观测到这次RCE,C4却没有观测到.在三颗卫星联合观测到的306次RCE中,C1观测到215次,C3观测到266次,C4观测到227次.统计研究表明,单点卫星观测到的RCE的平均时间也不能准确反映磁层内的RCE.由此推论在整个中心等离子体片内,快速对流事件所承担的能量和磁通量的输运量,可能远大于单点卫星观测给出的结果.用速度来定义的磁尾爆发性整体流(BBF,Bursty Bulk Flow)与亚暴的关系,比用磁通量定义的RCE与亚暴的关系要更加紧密.
In this paper, RCE (Rapid Convection Event) and its relationship with sub-storm are studied by using the data of three satellites (C1, C3 and C4) of Cluster Cluster in 2001 and 2002. The results show that single satellite The observation of RCE does not reflect the real situation of the magnetic tail RCE.On the occasion of an RCE incident on July 25, 2002, C1 and C3 observed this RCE and did not show C4.With the joint observation of three satellites In 306 RCEs, C1 was observed 215 times, C3 was observed 266 times, and C4 was observed 227 times.Statistical studies show that the average time of single-point satellite observations of RCE can not accurately reflect the RCE within the magnetosphere. The transport of energetic and magnetic fluxes for fast convective events throughout the central plasma sheet may be much larger than the results from single-point satellite observations. The velocity-defined magnetic tail burst integral flow (BBF, Bursty Bulk Flow and sub-storm relationship, than the definition of magnetic flux RCE and sub-storm relationship more closely.