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Propagation Effects of Slanted Narrow Bipolar Events: A Rebounding-Wave Model Study
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  • Dongshuai Li,
  • Alejandro Luque,
  • Farhad Rachidi,
  • Marcos Rubinstein,
  • Torsten Neubert,
  • Yanan Zhu,
  • Olivier Chanrion,
  • Caitano da Silva,
  • Paul Krehbiel
Dongshuai Li
National Space Institute, Technical University of Denmark (DTU Space)

Corresponding Author:dongshuaili@gmail.com

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Alejandro Luque
Institute for Astrophysics of Andalusia (IAA-CSIC), in Granada, Spain
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Farhad Rachidi
Swiss Federal Institute of Technology (EPFL)
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Marcos Rubinstein
University of Applied Sciences of Western Switzerland
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Torsten Neubert
Department of Solar System Physics, Denmark
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Yanan Zhu
Earth Networks
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Olivier Chanrion
National Space Institute (DTU Space)
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Caitano da Silva
New Mexico Tech
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Paul Krehbiel
New Mexico Tech
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Narrow bipolar events (NBEs) are impulsive and powerful intracloud discharges. Recent observations indicate that some NBEs exhibit a slanted orientation rather than strictly vertical. However, the inclination of NBEs has not been considered in previous transmission line models, leading to uncertainty when evaluating their characteristics based on electromagnetic fields. This paper investigates the propagation effects of slanted NBEs using a newly developed slanted rebounding-wave model. It is found that the calculated results using the proposed model match well with measurements for both vertical and slanted NBE cases. The inclination of the NBEs significantly affects the electromagnetic fields at close distances, while the effects weaken as the observation distance increases, where the fields are dominated by the radiation component. The slanted rebounding-wave model improves the agreement with respect to a purely vertical channel and can be extended to any discharge geometry at arbitrary observation distances.
25 Aug 2023Submitted to ESS Open Archive
11 Sep 2023Published in ESS Open Archive