DOI: 10.1002/2016GL068799
论文题名: EMIC wave spatial and coherence scales as determined from multipoint Van Allen Probe measurements
作者: Blum L.W. ; Agapitov O. ; Bonnell J.W. ; Kletzing C. ; Wygant J.
刊名: Geophysical Research Letters
ISSN: 0094-9611
EISSN: 1944-9342
出版年: 2016
卷: 43, 期: 10 起始页码: 4799
结束页码: 4807
语种: 英语
英文关键词: coherence scales
; EMIC waves
; multipoint measurements
Scopus关键词: Amplitude modulation
; Spacecraft
; Across distance
; Energetic electron
; Multipoint measurement
; Phase coherence
; Probe measurements
; Scattering efficiency
; Spatial extent
; Wave amplitudes
; Probes
英文摘要: Electromagnetic ion cyclotron (EMIC) waves can provide a strong source of energetic electron pitch angle scattering. These waves are often quite localized, thus their spatial extent can have a large effect on their overall scattering efficiency. Using measurements from the dual Van Allen Probes, we examine four EMIC wave events observed simultaneously on the two probes at varying spacecraft separations. Correlation of both the wave amplitude and phase observed at both spacecraft is examined to estimate the active region and coherence scales of the waves. We find well-correlated wave amplitude and amplitude modulation across distances spanning hundreds to thousands of kilometers. Phase coherence persisting 30–60 s is observable during close conjunction events but is lost as spacecraft separations exceed ~1 Earth Radii. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971343344&doi=10.1002%2f2016GL068799&partnerID=40&md5=366a102c69f53b47d4e94474ceaeb8a4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10574
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Space Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Blum L.W.,Agapitov O.,Bonnell J.W.,et al. EMIC wave spatial and coherence scales as determined from multipoint Van Allen Probe measurements[J]. Geophysical Research Letters,2016-01-01,43(10).