Implications of Multiple Corona Bursts in Lightning Processes for Radio Frequency Interferometer Observations

Implications of Multiple Corona Bursts in Lightning Processes for Radio Frequency Interferometer Observations
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闪电过程中多次电晕爆发对射频干涉仪观测的影响

DOI:
10.1029/2021gl097367
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发表时间:
2021
影响因子:
5.2
通讯作者:
F. Lind
F. Lind
中科院分区:
地球科学1区
文献类型:
--
作者:
Ningyu Liu;O. Scholten;J. Dwyer;B. Hare;C. Sterpka;J. Tilles;F. Lind

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LOFAR最近的观测表明,多个空间分布的电晕爆发可能发生在闪电过程中,时间尺度为10微秒。日冕爆发在空间和时间上的接近性对短基线(通常≤100 m)射电干涉仪的观测构成了巨大的挑战。本文报告模拟显示的干涉测量结果,将获得这样的干涉仪。特别是,如果仪器的分辨率大于爆发的空间间隔,则在固定位置的空间分离的电晕爆发可以被视为具有大功率变化的快速(>107 m/s)传播源。最后讨论了闪电干涉测量研究的意义和建议。
Recent observations from LOFAR indicate that multiple, spatially distributed corona bursts can occur in lightning processes with a timescale of 10 microseconds. The close proximity of the corona bursts in space and time poses a great observation challenge for short‐baseline (typically ≤100 m) radio interferometers. This paper reports simulations to show the interferometry results that would be obtained with such an interferometer. In particular, spatially‐separated corona bursts at fixed locations may be seen as a fast (>107 m/s) propagating source with large power variation if the resolution of the instrument is greater than the spatial separation of the bursts. The implications and suggestions for lightning interferometry studies are discussed in the paper.
DOI: 10.1029/2020jd032603
发表时间: 2020-09
期刊: Journal of Geophysical Research: Atmospheres
影响因子: --
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发表时间: 2021-04-28
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