Results 21 to 30 of about 7,402 (230)

Propagation of positive, negative, and recoil leaders in upward lightning flashes

open access: yesEarth and Planetary Physics, 2019
Leader propagation is a fundamental issue in lightning physics. The propagation characteristics of positive leaders and negative leaders are summarized and compared based on data from high-speed camera and electromagnetic field in rocket-triggered ...
XiuShu Qie   +11 more
doaj   +1 more source

Estimation of input energy in rocket‐triggered lightning [PDF]

open access: yesGeophysical Research Letters, 2006
Electric fields in the immediate vicinity (within 0.1 to 1.6 m) of the triggered‐lightning channel were measured with Pockels sensors at the International Center for Lightning Research and Testing at Camp Blanding, Florida. These fields and the associated currents measured at the base of a 2‐m strike object were used to compute the input power and ...
Vinod Jayakumar   +5 more
openaire   +1 more source

Return stroke current reflections in rocket‐triggered lightning [PDF]

open access: yesJournal of Geophysical Research: Atmospheres, 2016
AbstractTen upward propagating return stroke currents in eight triggered lightning flashes have been observed to reflect downward from 140 to 300 m altitude by way of measurements of the channel base current, close electric field and electric field derivative, and high‐speed video.
J. A. Caicedo   +4 more
openaire   +1 more source

Differences between triggered lightning striking to ground and distribution line inferred from measured currents and electromagnetic fields

open access: yesHigh Voltage, 2022
In 2018–2019, two types of rocket‐triggered lightning tests, that is, striking to ground and distribution line, were conducted in Guangdong, China. The main focus of this paper is to compare the waveform parameters of the return strokes (RS) from the two
Li Cai   +6 more
doaj   +1 more source

Wave Profile for Anti-force Waves with Maximum Possible Currents [PDF]

open access: yes, 2015
In the theoretical investigation of the electrical breakdown of a gas, we apply a one-dimensional, steady state, constant velocity, three component fluid model and consider the electrons to be the main element in propagation of the wave. The electron gas
Childs, W. P.   +3 more
core   +3 more sources

Wave Profile for Breakdown Waves with a Large Current Behind the Wave Front [PDF]

open access: yes, 2017
For analytical solution of breakdown waves with a large current behind the wave front, we employ a one-dimensional, steady-state, three-component (electrons, ions, and neutral particles) fluid model.
Bowman, M., Griffiths, J., Hemmati, M.
core   +3 more sources

Wave Profile for Current Bearing Antiforce Waves [PDF]

open access: yes, 2013
For fluid dynamical analysis of breakdown waves, we employ a one-dimensional, three-component (electrons, ions and neutral particles) fluid model to describe a steady-state, ionizing wave propagating counter to strong electric fields.
Childs, W.   +4 more
core   +3 more sources

Characteristics of Medium-low Frequency Magnetic Fields of Initial Continuous Current in Rocket-triggered Lightning

open access: yes应用气象学报, 2020
Rocket-triggered lightning experiment conducted in Field Experiment Base on Lightning Sciences, China Meteorological Administration (CMA_FEBLS) provides a good opportunity to study the discharge process and its related electromagnetic effects. During the
Fan Yanfeng   +5 more
doaj   +1 more source

Application of Genetic Algorithm to Estimation of Function Parameters in Lightning Currents Approximations

open access: yesInternational Journal of Antennas and Propagation, 2017
Genetic algorithm (GA) is applied for the estimation of two-peaked analytically extended function (2P-AEF) parameters in this paper. 2P-AEF is used for approximation of measured and typical lightning discharge currents.
V. Javor   +3 more
doaj   +1 more source

X-ray Observations at Gaisberg Tower

open access: yesAtmosphere, 2018
We report the occurrence of X-rays at ground level due to cloud-to-ground flashes of upward-initiated lightning from Gaisberg Tower, in Austria, which is located at an altitude of 1300 m.
Pasan Hettiarachchi   +5 more
doaj   +1 more source

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