Abstract
There exists inherent difficulty in measuring the horizontal electric field (Er) associated with lightning return strokes due to the overshadowing effect of the vertical electric field component, not much progress in Er measurements were observed until now. In order to study the characteristics of Er associated with nearby lightning return strokes, the modified transmission-line model with linear current decay with height (MTLL) return stroke model and Finite Difference Time Domain (FDTD) method were used to calculate Er for 12 observation points with different distances (20, 50 100, and 200m) away from the lightning channel and different heights (0, 10, and 20m) above ground. Four characteristic parameters, namely, the return-stroke speed (v), the total length of the return stroke channel (H), the ground relative permittivity (ε) and the ground conductivity (σ), were considered. Results show that the polarity of Er changes between the ground level and the space. The influence intensity rank of the four characteristic parameters on Er at ground level is: σ>v>ε>H. The influence of the characteristic parameters on Er are more important for v≤0.6c, H≤6000m and σ≤2.5×10−3S/m.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Journal of Atmospheric and Solar-Terrestrial Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.