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Radiation field wave forms produced by lightning stepped leadersBroadband electric field data are presented which show stepped leader wave forms preceding records of distant lightning return strokes. The majority of leader pulses are characterized by a large initial peak with a small and slow opposite overshoot. Total pulse durations range from 15-40 microsec several milliseconds before the return stroke to 2-10 microsec immediately preceding the return stroke. Close to the ground the stepped leader pulses occur at regular 10- to 20-microsec intervals and are almost unipolar with rise times of about 1 microsec and full widths at half maximum in the range from 1 to 3 microsec. The ratio of the peak of the last leader pulse to the subsequent return stroke peak is typically 0.1, which suggests a peak step current near the ground of about 10% of the return stroke peak current.
Document ID
19750051547
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Krider, E. P.
Radda, G. J.
(Arizona, University Tucson, Ariz., United States)
Date Acquired
August 8, 2013
Publication Date
June 20, 1975
Publication Information
Publication: Journal of Geophysical Research
Volume: 80
Subject Category
Meteorology And Climatology
Accession Number
75A35619
Funding Number(s)
CONTRACT_GRANT: N00014-67-A-0209-0015
Distribution Limits
Public
Copyright
Other

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