空间科学学报2025，Vol.45Issue(4)：950-959,10.DOI:10.11728/cjss2025.04.2024-0079
FY-3D电离层光度计IPM对2024年5月11日特大磁暴的响应研究
Study of FY-3D Ionospheric Photometer(IPM)Response to the Extreme Magnetic Storm on 11 May 2024
摘要
Abstract
With the launch of the FY-3D satellite on 15 November 2017,the far ultraviolet Ionosphe-ric Photometer(IPM)on board enables measurements of nighttime 135.6 nm airglow emissions generat-ed by the recombination of O+ions and electrons,as well as daytime emissions from OI 135.6 nm and N2 LBH due to photoelectron impact on atomic oxygen and molecular nitrogen.These measurements can obtain the key parameters such as nighttime peak electron density NmF2 and daytime O/N2.The paper analyzes the response of IPM data during the extreme magnetic storm event on 11 May 2024.The study results of daytime data indicate that during the event,the O/N2 decreased at all latitudes compared to geomagnetically quiet days.This finding can be used to explain the negative storm effects observed in IGS TEC.The study of nighttime data reveals that during magnetic storms,the intensity of 135.6 nm increases significantly across all latitudes compared to geomagnetically quiet days,with an increase by up to three orders of magnitude.The enhancement persists from the storm main phase through the re-covery phase.However,corresponding TEC data does not show such a pronounced increase.Further-more,the stray light channel measuring radiation contribution above 190 nm wavelength also exhibits a significant increase during magnetic storm days.This further indicates that the enhancement of night-time 135.6 nm radiation is not solely derived from ionospheric contributions.关键词
Dst指数/135.6nm辉光辐射/N2LBH带辉光辐射/O/N2Key words
Dst index/135.6nm airglow emissions/N2LBH airglow emission/O/N2分类
天文与地球科学引用本文复制引用
江芳,毛田,付利平,王劲松,胡秀清,张效信,王云岗,贾楠,王天放..FY-3D电离层光度计IPM对2024年5月11日特大磁暴的响应研究[J].空间科学学报,2025,45(4):950-959,10.基金项目
国家重点研发计划项目(2022YFF0503901),国家自然科学基金项目(41874187,42174226)和低轨空间等离子体环境模拟装置关键部件中意合作研究项目(Z221100002722006)共同资助 （2022YFF0503901）
