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

作　　者：CHEN YanPing NI BinBin GU XuDong ZHAO ZhengYu YANG GuoBin ZHOU Chen ZHANG YuanNong CHEN YanPing NI BinBin GU XuDong ZHAO ZhengYu YANG GuoBin ZHOU Chen ZHANG YuanNong(Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China)

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

出　　处：《Science China(Technological Sciences)》2017年第1期166-174,共9页中国科学（技术科学英文版）

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 lati- tude 21.81°N, longitude 174.44°E, L=1.16） to detect low latitude extremely-low-frequency （ELF： 0.3-3 kHz） and very-low-frequency （VLF： 3-30 kHz） emissions originating from either natural or artificial sources since February 2016. Dur- ing the first-month operation of the receiver system, a total of 3039 clear whistlers have been recorded at this low latitude sta- tion with the majority （97.0%） occurring on 28 February and 1 March 2016. Observed whistlers manifest various types includ- ing single one-hop, echo train, multi-flash, and multi-path. They tend to intensify after local midnight, reach the peak around 04435 LT, and then weaken quickly. Both features of lower cutoff frequencies of most whistlers below -1.6 kHz 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 s1/2 and 23 s1/2 for observed one-hop whistlers and is greater than 50 sm for three-hop echo train whistlers, indicating that the whistlers observed at the Suizhou station are low lati- tude whistlers.

关 键 词：WHU ELF/VLF receiver WHISTLERS DISPERSION duct mode 

分 类 号：TN851[电子电信—信息与通信工程]