1 AU轨道SEP粒子通量的计算及与多卫星观测结果的比较

王娅冰; 郑宇卿; 顾斌; 丁留贯; 乐贵明; 吕建永

doi:10.11728/cjss2016.03.331

1 AU轨道SEP粒子通量的计算及与多卫星观测结果的比较

doi: 10.11728/cjss2016.03.331

1.
南京信息工程大学物理系南京 210044
2.
南京信息工程大学空间天气研究所南京 210044
3.
中国气象局国家空间天气监测预警中心北京 100039

基金项目: 国家自然科学基金项目资助(41304150, 11105075)

详细信息

作者简介:
顾斌,E-mail:gubin@nuist.edu.cn

中图分类号: P182
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出版历程
- 收稿日期: 2015-06-16
- 修回日期: 2015-12-18
- 刊出日期: 2016-05-15

Calculation of the SEP Flux at 1 AU Orbit and Its Comparison with Multi-satellites Observations

1.
Department of Physics, Nanjing University of Information Science and Technology, Nanjing 210044
2.
Institute of Space Weather, Nanjing University of Information Science and Technology, Nanjing 210044
3.
National Center of Space Weather, China Meteorological Administration, Beijing 100039

摘要

摘要: 1 AU轨道上太阳高能粒子(Solar Energetic Particles,SEP)通量是空间天气的重要指标.将SEP两步传播方程的格林函数解进行数值化,模拟了2012年9月28日的SEP事件,首次计算了同一事件中GOES卫星与STEREO双星观测到的SEP通量变化过程.对GOES和STEREO-B观测点,计算所得SEP峰值I_max和峰值到达时间t_max与观测值符合较好;对STEREO-A,由于观测点与太阳活动源区间隔较大及太阳背面未知事件的影响,计算结果与观测存在一定差异.
- 1 AU轨道SEP通量 /
- 格林函数解 /
- 多点观测
Abstract: The SEP (Solar Energetic Particles) flux at 1 AU orbit is an important index of space weather condition.Based on the parameterized Green Function solution of the SEP transport equation in the ecliptic plane,the flux profile of the SEP event on 28 Sept.2012 at GOES,STEREO-A and STEREO-B positions on the 1 AU orbit is calculated,and results are compared with available observations.The results show that the flux peak I_max and its occurrence time t_max of the SEP profile are well consistent with the observation of GOES and STEREO-B.However,for STEREO-A, there is an evident difference between our calculation and the observation,which may be induced by the large angle distance between the site and the SEP source and the unknown solar activities on the backside of the Sun.The parameterized SEP flux formula may be applicable for single source impulsive SEP events.
- 1 AU orbit SEP flux /
- Green function method /
- Multi-point observation

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参考文献(20)

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