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利用聚类算法区分小尺度电离层行扰事件与赤道等离子体泡事件

汪领 尹凡

汪领, 尹凡. 利用聚类算法区分小尺度电离层行扰事件与赤道等离子体泡事件[J]. 空间科学学报, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014
引用本文: 汪领, 尹凡. 利用聚类算法区分小尺度电离层行扰事件与赤道等离子体泡事件[J]. 空间科学学报, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014
WANG Ling, YIN Fan. Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm[J]. Journal of Space Science, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014
Citation: WANG Ling, YIN Fan. Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm[J]. Journal of Space Science, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014

利用聚类算法区分小尺度电离层行扰事件与赤道等离子体泡事件

doi: 10.11728/cjss2020.06.1014
基金项目: 

国家重点研发计划项目(2018YFC1503501,2018YFC1503501-01),国家自然科学基金重点项目(41431073)和国家自然科学基金面上项目(41474157)共同资助

详细信息
    作者简介:

    汪领,E-mail:wlydjqcg@whu.edu.cn

    通讯作者:

    尹凡,E-mail:yinfan@whu.edu.cn

  • 中图分类号: P352

Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm

  • 摘要: 利用Swarm卫星2015年1月1日至2019年12月31日的50Hz高频磁场数据,根据阈值判断垂直于主磁场方向的扰动,对磁纬45°N-45°S之间的小尺度电离层行扰事件进行探测.为避免混淆而产生的干扰,可以根据阈值判断平行于主磁场方向是否发生扰动,从而排除典型的赤道等离子体泡事件.但对于较弱的赤道等离子体泡事件,扰动阈值判断无效.为避免弱赤道等离子体泡事件的污染,根据小尺度电离层行扰事件和赤道等离子体泡事件在不同参数空间中的密度分布差异,利用基于密度的聚类算法将赤道等离子体泡事件进一步甄别提取.结果表明,聚类算法能够有效地将赤道等离子体泡事件从小尺度电离层行扰事件中甄选出来,并使小尺度电离层行扰事件聚类与赤道等离子体泡事件聚类形成清晰的边界.由聚类算法导出的弱赤道等离子体泡事件主要分布在磁纬15°N-15°S,地理经度20°-60°W,月份10至3月之间,并且在20:00MLT-24:00MLT存在高发生率,同时依赖于太阳活动,这也验证了前人的相关研究结果.

     

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出版历程
  • 收稿日期:  2020-01-13
  • 修回日期:  2020-04-17
  • 刊出日期:  2020-11-15

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