First observations of low latitude whistlers using WHU ELF/VLF receiver system

查看全文 作　　者：CHEN [1]YanPing;NI [1]BinBin;GU [1]XuDong;ZHAO [1]ZhengYu;YANG [1]GuoBin;ZHOU [1]Chen;ZHANG [1]YuanNong

机构地区：[1]Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China

出　　处：《Science China(Technological Sciences)》索引2017年第60卷第1期,共9页

基　　金：supported by the National Natural Science Foundation of China(Grants Nos.41204120,41474141,41304127,41304130,and 41574160);the Projects funded by China Postdoctoral Science Foundation(Grants Nos.2013M542051,2014T70732);the 985 funded project of School of Electronic information,Wuhan University 摘　　要：The recently developed high-quality WHU ELF/VLF receiver system has been deployed in Suizhou, China(geomagnetic latitude 21.81°N, longitude 174.44°E, L=1.16) to detect low latitude extremely-low-frequency(ELF: 0.3-3 k Hz) and very-low-frequency(VLF: 3-30 k Hz) emissions originating from either natural or artificial sources since February 2016. During the first-month operation of the receiver system, a total of 3039 clear whistlers have been recorded at this low latitude station with the majority(97.0%) occurring on 28 February and 1 March 2016. Observed whistlers manifest various types including single one-hop, echo train, multi-flash, and multi-path. They tend to intensify after local midnight, reach the peak around 04-05 LT, and then weaken quickly. Both features of lower cutoff frequencies of most whistlers below ~1.6 k Hz and almost uniform dispersion for many successive multi-flash whistlers suggest that these whistlers propagate along the geomagnetic field lines in the duct mode. The computed dispersion varies between ~15 s^(1/2) and 23 s^(1/2) for observed one-hop whistlers and is greater than 50 s^(1/2) for three-hop echo train whistlers, indicating that the whistlers observed at the Suizhou station are low latitude whistlers. 关键词：WHU ELF/VLF 接收装置 WHISTLERS 分散管模式

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First observations of low latitude whistlers using WHU ELF/VLF receiver system

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