Ionospheric response to the May 2024 geomagnetic storm within the SAA region:Analysis with MSS-1,COSMIC-2,and ground-based GNSS data  

作　　者：JinHuan Du Zhe Yang 

机构地区：[1]College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China

出　　处：《Earth and Planetary Physics》2025年第3期719-730,共12页地球与行星物理(英文版)

基　　金：support from the National Natural Science Foundation of China(No.42274027);the Fundamental Research Funds for the Central Universities;supported also by the Macao Foundation。

摘　　要：This study utilizes radio occultation observations from the Macao Science Satellite-1 mission(MSS-1)to investigate ionospheric response to the May 2024 G5 geomagnetic storm within the South Atlantic Anomaly(SAA)region.The distinctive data from MSS-1,complemented by observations from the ground-based Global Navigation Satellite System(GNSS)and the Constellation Observing System for Meteorology,Ionosphere,and Climate follow-on satellite mission(COSMIC-2),reveal a super plasma fountain effect during the main phase of the storm.This effect was marked by peaks in the equatorial ionization anomaly that extended beyond their typical latitude range.The MSS-1 observations,particularly in the northern hemisphere of the SAA region,confirm the role of prompt penetration electric fields in driving ionospheric disturbances and amplifying scintillation at higher altitudes.The study also identifies a decrease in total electron content and a reduction in scintillation occurrence during the recovery phase of the storm.The results demonstrate the pivotal role that MSS-1 observations can play,when combined with ground-based and COSMIC-2 observations,in providing a more comprehensive understanding of ionospheric response to severe geomagnetic storms.

关 键 词：Macao Science Satellite-1 radio occultation 2024 May 10−11 geomagnetic storm South Atlantic Anomaly ionospheric disturbances 

分 类 号：P352[天文地球—空间物理学]