DOI: 10.1002/2014GL061371
论文题名: Multipoint visualization of ULF oscillations using the Super Dual Auroral Radar Network
作者: Bland E.C. ; McDonald A.J. ; Menk F.W. ; Devlin J.C.
刊名: Geophysical Research Letters
ISSN: 0094-9788
EISSN: 1944-9519
出版年: 2014
卷: 41, 期: 18 起始页码: 6314
结束页码: 6320
语种: 英语
英文关键词: Pc5
; SuperDARN
; ULF waves
Scopus关键词: Magnetosphere
; Radar
; Visualization
; Geographical coverage
; Lomb-scargle periodogram
; Northern Hemispheres
; Pc5
; Super dual auroral radar network
; SuperDARN
; ULF waves
; Ultra low frequencies
; Radar astronomy
; aurora
; backscatter
; data set
; frequency analysis
; ionosphere
; magnetosphere
; noise
; radar
; visualization
英文摘要: We present a technique for the automatic detection of Pc5 (150 s to 600 s period) ultralow frequency (ULF) pulsations in ground and ionospheric backscatter from the Super Dual Auroral Radar Network (SuperDARN). This new technique enables rapid identification and visualization of ULF oscillations over the very wide geographical coverage of SuperDARN. The technique detects ULF oscillations using the Lomb-Scargle periodogram method, which provides a natural test for periodic behavior against the null hypothesis of a pure noise distribution. This does not require any interpolation across data gaps and is thus appropriate for SuperDARN data. We demonstrate the application of the technique to SuperDARN data for March 2014 and find that Pc5 pulsations are frequently observed by multiple radars simultaneously. A preliminary investigation using data from all Northern Hemisphere SuperDARN radars indicates that Pc5 pulsation activity occurs most often on the nightside of the magnetosphere, with a mean frequency of about 2 mHz. Key PointsTechnique for automatic detection of ULF oscillations in SuperDARN dataRapid visualization of the presence and spatial extent of Pc5 pulsation activityPc5 ULF oscillations observed most often on the nightside of the magnetosphere ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911059462&doi=10.1002%2f2014GL061371&partnerID=40&md5=4708ad504eba3c8cfdf17cadfed6a0bf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7052
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, La Trobe University, Bundoora, VIC, Australia
Recommended Citation:
Bland E.C.,McDonald A.J.,Menk F.W.,et al. Multipoint visualization of ULF oscillations using the Super Dual Auroral Radar Network[J]. Geophysical Research Letters,2014-01-01,41(18).