Propagation Effects Due to Finitely Conducting Ground on Lightning-Generated Magnetic Fields Evaluated Using Sommerfeld's Integrals

Propagation Effects Due to Finitely Conducting Ground on Lightning-Generated Magnetic Fields Evaluated Using Sommerfeld's Integrals

The effects of finitely conducting ground on the signature of lightning-generated magnetic fields at ground level were evaluated by numerical solution of Sommerfeld's integrals. Results are presented for distances between 10 m to 1 km from the lightning channel and for ground conductivities in...

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Veröffentlicht in:IEEE transactions on electromagnetic compatibility 2009-08, Vol.51 (3), p.526-531
1. Verfasser: Cooray, V.
Format: Artikel
Sprache:eng
Schlagworte:
Approximation
Approximation methods
Attenuation
Conduction
Conductivity
Distance measurement
Electromagnetic compatibility
Electromagnetics
finite ground conductivity
Grounds
Integrals
Lightning
Magnetic domains
magnetic field
Magnetic fields
Mathematical analysis
Mathematical model
propagation effects
radiation field
return stroke
TECHNOLOGY
TEKNIKVETENSKAP
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Zusammenfassung:The effects of finitely conducting ground on the signature of lightning-generated magnetic fields at ground level were evaluated by numerical solution of Sommerfeld's integrals. Results are presented for distances between 10 m to 1 km from the lightning channel and for ground conductivities in the range of 0.01 and 0.0001 S/m. The results obtained from the exact theory are compared with the predictions of two frequently used analytical approximations to Sommerfeld's equations. Based on that comparison, the limits of validity of these approximate theories are obtained.
ISSN:0018-9375
1558-187X
1558-187X
DOI:10.1109/TEMC.2009.2019759