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Lightning electromagnetic radiation field spectra in the interval from 0.2 to 20 MHzNew Fourier transforms of wideband time-domain electric fields (E) produced by lightning (recorded at the Kennedy Space Center during the summers of 1985 and 1987) were recorded in such a way that several different events in each lightning flash could be captured. Average HF spectral amplitudes for first return strokes, stepped-leader steps, and 'characteristic pulses' are given for significantly more events, at closer ranges, and with better spectral resolution than in previous literature reports. The method of recording gives less bias toward the first large event in the flash and thus yields a large sample of a wide variety of lightning processes. As a result, reliable composite spectral amplitudes are obtained for a number of different processes in cloud-to-ground lightning over the frequency interval from 0.2 to 20 MHz.
Document ID
19910033131
Document Type
Reprint (Version printed in journal)
Authors
Willett, J. C. (USAF, Geophysics Laboratory, Hanscom AFB MA, United States)
Bailey, J. C. (Alabama, University Huntsville, United States)
Leteinturier, C. (Institut de Physique et de Chimie des Materiaux Nantes, France)
Krider, E. P. (Arizona, University Tucson, United States)
Date Acquired
August 15, 2013
Publication Date
November 20, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: F49620-86-C-0013
CONTRACT_GRANT: NAS10-11390
CONTRACT_GRANT: NAS8-36477
Distribution Limits
Public
Copyright
Other