| DOI: | 10.1002/2015GL063482
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| 论文题名: | CTBT infrasound network performance to detect the 2013 Russian fireball event |
| 作者: | Pilger C.; Ceranna L.; Ross J.O.; Le Pichon A.; Mialle P.; Garcés M.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8781
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| EISSN: | 1944-8512
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| 出版年: | 2015
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| 卷: | 42, 期:7 | | 起始页码: | 2523
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| 结束页码: | 2531
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| 语种: | 英语
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| 英文关键词: | Chelyabinsk meteorite
; CTBT-IMS
; detection performance
; infrasound
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| Scopus关键词: | Earth sciences
; Geophysics
; Background noise levels
; Comprehensive Nuclear-Test-Ban Treaty
; CTBT-IMS
; Detection capability
; Detection performance
; Explosive fragmentation
; Infrasound
; International monitoring systems
; Meteorites
; acoustics
; infrasonics
; meteorite
; nocturnal activity
; parameterization
; trajectory
; Russian Federation
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| 英文摘要: | The explosive fragmentation of the 2013 Chelyabinsk meteorite generated a large airburst with an equivalent yield of 500 kT TNT. It is the most energetic event recorded by the infrasound component of the Comprehensive Nuclear-Test-Ban Treaty-International Monitoring System (CTBT-IMS), globally detected by 20 out of 42 operational stations. This study performs a station-by-station estimation of the IMS detection capability to explain infrasound detections and nondetections from short to long distances, using the Chelyabinsk meteorite as global reference event. Investigated parameters influencing the detection capability are the directivity of the line source signal, the ducting of acoustic energy, and the individual noise conditions at each station. Findings include a clear detection preference for stations perpendicular to the meteorite trajectory, even over large distances. Only a weak influence of stratospheric ducting is observed for this low-frequency case. Furthermore, a strong dependence on the diurnal variability of background noise levels at each station is observed, favoring nocturnal detections. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928698216&doi=10.1002%2f2015GL063482&partnerID=40&md5=499489f3c405df2504b20dcbbfb3de95
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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/8397
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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: | Federal Institute for Geosciences and Natural Resources, Hannover, Germany
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| Recommended Citation: | |
Pilger C.,Ceranna L.,Ross J.O.,et al. CTBT infrasound network performance to detect the 2013 Russian fireball event[J]. Geophysical Research Letters,2015-01-01,42(7).
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