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利用密西根大学空间环境模拟中心的SWMF(space weather modeling framework)模型对亚暴事件首次进行预测模拟,并结合Geotail和Cluster卫星数据对模拟结果进行了验证.该亚暴事件发生在2004年9月28日22:08UT时刻,由美国宇航局IMAGE卫星极光观测仪器记录.SWMF能够有效地耦合磁层、内磁层和电离层区域,由太阳风行星际磁场驱动.研究表明,SWMF模型能较好地预测亚暴期间磁尾磁场和电离层电流大尺度的变化,太阳风行星际磁场参数从ACE卫星到模型外边界的时间延迟方法的准确性对模型结果有较大影响,最后对亚暴的触发机制进行了讨论并指出模型需要改进之处.
The first simulation of sub-storm events was performed using the space weather modeling framework (SWMF) model from the University of Michigan’s Spatial Simulation Center and the simulation results were validated using Geotail and Cluster satellite data. The sub-storms occurred in September 2004 At 28:08 UTC on the 28th, recorded by NASA IMAGE satellite aurora optical instruments, the SWMF can effectively couple the magnetosphere, the inner magnetosphere and the ionosphere and is driven by the interplanetary magnetic field of the solar wind. The research shows that the SWMF model can better Prediction of the large-scale changes in the tail magnetic field and the ionospheric current during the sub-storm show that the accuracy of the time delay of the satellite’s interplanetary magnetic field parameters from the ACE satellite to the outer boundary of the model has a great impact on the model results. Finally, Discussed and pointed out that the model needs improvement.