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<專題討論>2018/10/18(四)14:10綜合大樓2樓48218教室演講 : 談永頤 教授(成功大學電漿所)

張貼者:2018年10月11日 下午11:29Dabby Lu
講題:Parameters of magnetospheric locations associated with occurrences of aurora and comparison with their ionospheric counterparts
摘要:The Energization and Radiation in Geospace (ERG) satellite (nicknamed "Arase"), launched from the Uchinoura Space Center in December 2016, began its regular observations of the inner magnetosphere in March 2017. Among the various instruments aboard the Japanese satellite is the Low‐Energy Particle Experiments ‐ Electron Analyzer (LEP-e), developed by a Taiwanese team that featured members from Academia Sinica and National Cheng Kung University. The instrument measures electrons in the energy range between ~20 eV and 19 keV. As ERG's orbit covers the range of McIlwain L-parameter roughly from 2 to 9, overlapping with that of the auroral oval in the ionosphere, LEP-e is suitable for studying the magnetospheric origins of auroral electrons. In this study, we statistically compare the Auroral Electrojet (AE) index with LEP-e measurements as well as ERG data from the Medium-Energy Particle Experiments - Electron Analyzer (MEP-e). The correlation coefficients between the AE index and measurements at various electron energies enable us to identify the magnetic local times (MLT) together with L for the magnetospheric locations that are most often in association with occurrences of aurora. These parameters, MLT and L, are compared with those at ionospheric locations where auroral electron precipitation is statistically the dominant density-perturbation effect during disturbed times according to observations from another international collaborative satellite mission involving Taiwan, namely FORMOSAT-3/COSMIC.
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Dabby Lu,
2018年10月11日 下午11:29
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