Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025863 |
Frequency domain analysis of triggered lightning return stroke luminosity velocity | |
Carvalho, F. L.; Uman, M. A.; Jordan, D. M.; Moore, R. C. | |
2017-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
![]() |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Fourier analysis is applied to time domain return stroke luminosity signals to calculate the phase and group velocities and the amplitude of the luminosity signals as a function of frequency measured between 4m and 115m during 12 triggered lightning strokes. We show that pairs of time domain luminosity signals measured at different heights can be interpreted as the input and the output of a system whose frequency domain transfer function can be determined from the measured time domain signals. From the frequency domain transfer function phase we find the phase and group velocities, and luminosity amplitude as a function of triggered lightning channel height and signal frequency ranging from 50 kHz to 300 kHz. We show that higher-frequency luminosity components propagate faster than the lower frequency components and that higher-frequency luminosity components attenuate more rapidly than lower frequency components. Finally, we calculate time domain return stroke velocities as a function of channel height using two time delay techniques: (1) measurement at the 20% amplitude level and (2) cross correlation. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396121200018 |
WOS关键词 | FLASHES ; CHANNEL ; SPEEDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32729 |
专题 | 气候变化 |
作者单位 | Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA |
推荐引用方式 GB/T 7714 | Carvalho, F. L.,Uman, M. A.,Jordan, D. M.,et al. Frequency domain analysis of triggered lightning return stroke luminosity velocity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(4). |
APA | Carvalho, F. L.,Uman, M. A.,Jordan, D. M.,&Moore, R. C..(2017).Frequency domain analysis of triggered lightning return stroke luminosity velocity.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(4). |
MLA | Carvalho, F. L.,et al."Frequency domain analysis of triggered lightning return stroke luminosity velocity".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.4(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论