High-speed video observations of a natural negative stepped leader and subsequent dart-stepped leader
نویسندگان
چکیده
منابع مشابه
High‐speed video observations of a lightning stepped leader
[1] High‐speed video images of eight branches of a lightning stepped leader recorded at a frame rate of 300 kiloframes per second (kfps) (3.33 ms exposure) are analyzed, representing the fastest published frame rate measurements of stepped leader stepping by about 1 order of magnitude and the first observations of space stems/leaders associated with stepped leaders. Sixteen occurrences of space...
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[1] This paper reports multiplatform observations of leader radiation preceding initial cloud-to-ground lightning return strokes by <6 ms. Specifically, we present multistation ground-based LF/VLF recordings of events with large-amplitude leader activity (comparable in amplitude to the return stroke amplitude). The events were selected for their coincidence with VHF observations by the FORTE sa...
متن کاملEMC’04/Sendai LIGHTNING STEPPED LEADER NUMERICAL SIMULATION
A lightning stepped leader model is developed. To predict the stepped leader is important to protect installations at ground against lightning. The numerical technique TLM (Transmission-line matrix) is applied.
متن کاملNovel model for the simulation of lightning stepped leader - Science, Measurement and Technology, IEE Proceedings-
The stepped leader forms the first phase of the first stroke in any lightning flash. It is basically a stepwise elongating discharge in air, which carries significant charge. The charge distribution on the leader and its velocity of descent determine the attractive radius in shielding efficiency calculations. Also, the conductivity and the charge distribution on the leader tip region govern the...
متن کاملObservations of stepping mechanisms in a rocket‐and‐wire triggered lightning flash
[1] We present 10 high‐speed video images that depict the bottom 150 m of a downward‐ negative, dart‐stepped leader in a rocket‐and‐wire triggered flash, recorded at 240 kiloframes per second (4.17 ms frame integration time), along with correlated measurements of the X‐ray emission at 50 m, electric field derivative (dE/dt) at 80 m, and the rocket‐ launch‐tower current beneath the leader. We ob...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2013
ISSN: 2169-897X
DOI: 10.1002/2013jd019910