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Characteristics of High-Energy Proton Responses to Geomagnetic Activities in the Inner Radiation Belt Observed by the RBSP Satellite
Xu, Jiyao; He, Zhaohai; Baker, D. N.; Roth, Ilan; Wang, Chi; Kanekal, S. G.; Jaynes, A. N.; Liu, Xiao
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2019
Volume124Issue:9Pages:7581-7591
DOI10.1029/2018JA026205
ISSN2169-9380
Language英语
Keywordinner radiation belt geomagnetic activities high-energy proton prompt responses one-to-one correspondence RBSP satellite
AbstractHigh-energy trapped particles in the radiation belts constitute potential threats to the functionality of satellites as they enter into those regions. In the inner radiation belt, the characteristics of high-energy (>20 MeV) protons variations during geomagnetic activity times have been studied by implementing 4-year (2013-2016) observations of the Van Allen probes. An empirical formula has been used to remove the satellite orbit effect, by which proton fluxes have been normalized to the geomagnetic equator. Case studies show that the region of L < 1.7 is relatively stable, while L > 1.7 is more dynamic and the most significant variation of proton fluxes occurs at L = 2.0. The 4-year survey at L = 2.0 indicates that for every geomagnetic storm, sharp descent in proton fluxes is accompanied by the corresponding depression of SYM-H index, with a one-to-one correspondence, regardless of the storm intensity. Proton flux dropouts are synchronous with SYM-H reduction with similar short timescales. Our observational results reveal that high-energy protons in the inner radiation belt are very dynamic, especially for the outer zone of the inner belt, which is beyond our previous knowledge.
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7200
Collection空间科学部
Recommended Citation
GB/T 7714
Xu, Jiyao,He, Zhaohai,Baker, D. N.,et al. Characteristics of High-Energy Proton Responses to Geomagnetic Activities in the Inner Radiation Belt Observed by the RBSP Satellite[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019,124(9):7581-7591.
APA Xu, Jiyao.,He, Zhaohai.,Baker, D. N..,Roth, Ilan.,Wang, Chi.,...&Liu, Xiao.(2019).Characteristics of High-Energy Proton Responses to Geomagnetic Activities in the Inner Radiation Belt Observed by the RBSP Satellite.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(9),7581-7591.
MLA Xu, Jiyao,et al."Characteristics of High-Energy Proton Responses to Geomagnetic Activities in the Inner Radiation Belt Observed by the RBSP Satellite".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 124.9(2019):7581-7591.
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