彭辉^1,2,,
王志强^1,,
1. 南京航空航天大学航天学院, 南京 210016
2. 中国科学院空间天气学国家重点实验室, 北京 100190

基金项目: 中国博士后科学基金项目（2019T120423，2019M651821），中央高校基本科研业务费专项资金（NS2019048），空间天气学国家重点实验室专项基金项目，国家海洋局极地科学重点实验室开放基金（KP201703）联合资助


详细信息

作者简介: 彭辉, 男, 1999年生, 本科生, 主要从事等离子体层方面的研究.E-mail:penghui.ali@aliyun.com

通讯作者: 王志强, 副教授, 主要从事磁层物理学的研究.E-mail:zqwang@nuaa.edu.cn

中图分类号: P353;P354

收稿日期:2020-07-21
修回日期:2020-09-04
上线日期:2021-02-10

Improvement of the plasmapause location model based on LANL satellite

PENG Hui^1,2,,
WANG ZhiQiang^1,,
1. School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2. State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China


More Information

Corresponding author: WANG ZhiQiang,E-mail:zqwang@nuaa.edu.cn

MSC: P353;P354

--> Received Date: 21 July 2020
Revised Date: 04 September 2020
Available Online: 10 February 2021


摘要
摘要:本文利用RBSP-A卫星在强磁暴和中等磁暴条件下测得的电子密度数据，对Goldstein等人在2019年构造的等离子体层顶位置动态解析模型进行了误差检验.发现在日侧区域，特别是羽状区的模型计算结果与观测数据存在较大误差，平均误差达到32.31%.为了改进模型的误差情况，我们利用LANL卫星数据对1998年到2006年间的14次中等磁暴情况下，日侧羽状区的等离子体层顶位置进行了统计.结果表明，随着磁暴时期（-12 h ≤ T_epoch ≤ 4 h）的变化，羽状区在接近磁暴峰值时会产生西漂，而在峰值之后迅速收缩并东漂.针对这种现象，我们分4个时段，对这一时期的模型进行了修改.改进后的模型在羽状区的平均误差从27.34%下降到20.2%，准确度提高了26%，得到的模型计算结果更符合卫星观测值.
关键词: 等离子体层/
等离子体层顶/
羽状区/
地磁活动/
历元分析

Abstract:Using the electron density data measured by the RBSP-A satellite in strong magnetic storms and moderate magnetic storms, an error test is carried out on the dynamic analytical model of the plasmapause location newly constructed by Goldstein et al. in 2019. It is found that there is a large error between the model calculation results and observation data in the dayside area, especially the plume, and the average error reaches 32.31%. To improve the error situation of the model, we use LANL satellite data to analyze 14 moderate magnetic storms between 1998 and 2006. The plasmapause location in the plume region was counted. The results show that with the change of the magnetic storm period (-12 h ≤ T_epoch ≤ 4 h), the plume region will have a westward drift when approaching the peak of the magnetic storm, and then contract rapidly and drift east after the peak. In view of this phenomenon, we modify the model in this period into four parts. The average error of the improved model in the plume region has decreased from 27.34% to 20.2%, and the accuracy has been improved by 26%. The model calculation results obtained are more in line with satellite observations.
Key words:Plasmasphere/
Plasmapause/
Plume/
Geomagnetic activity/
Epoch analysis



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