| DOI: | 10.1002/2015GL064142
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| 论文题名: | Map of low-frequency electromagnetic noise in the sky |
| 作者: | Füllekrug M.; Mezentsev A.; Watson R.; Gaffet S.; Astin I.; Smith N.; Evans A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9486
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| EISSN: | 1944-9217
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| 出版年: | 2015
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| 卷: | 42, 期:11 | | 起始页码: | 4648
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| 结束页码: | 4653
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| 语种: | 英语
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| 英文关键词: | array analysis
; atmospheric and space electricity
; electromagnetic noise
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| Scopus关键词: | Electric fields
; Electromagnetic waves
; Noise pollution
; Array analysis
; Dispersion relations
; Electromagnetic emissions
; Electromagnetic environments
; Electromagnetic noise
; Lightning discharge
; Particle precipitation
; Transient luminous events
; Electric discharges
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| 英文摘要: | The Earth's natural electromagnetic environment is disturbed by anthropogenic electromagnetic noise. Here we report the first results from an electromagnetic noise survey of the sky. The locations of electromagnetic noise sources are mapped on the hemisphere above a distributed array of wideband receivers that operate in a small aperture configuration. It is found that the noise sources can be localized at elevation angles up to ∼60° in the sky, well above the horizon. The sky also exhibits zones with little or no noise that are found toward the local zenith and the southwest of the array. These results are obtained by a rigorous analysis of the residuals from the classic dispersion relation for electromagnetic waves using an array analysis of electric field measurements in the frequency range from ∼20 to 250 kHz. The observed locations of the noise sources enable detailed observations of ionospheric modification, for example, caused by particle precipitation and lightning discharges, while the observed exclusion zones enable the detection of weak natural electromagnetic emissions, for example, from streamers in transient luminous events above thunderclouds. ©2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934440081&doi=10.1002%2f2015GL064142&partnerID=40&md5=01f80190f32798b0293d5f62a37d57cf
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9101
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| 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: | Department of Electronic and Electrical Engineering, Centre for Space, Atmospheric and Oceanic Science, University of Bath, Bath, United Kingdom
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| Recommended Citation: | |
Füllekrug M.,Mezentsev A.,Watson R.,et al. Map of low-frequency electromagnetic noise in the sky[J]. Geophysical Research Letters,2015-01-01,42(11).
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