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A comparison of the optical pulse characteristics of intracloud and cloud-to-ground lightning as observed above cloudsThe optical-pulse characteristics of intracloud (IC) and cloud-to-ground (CG) lightning flashes were investigated. The time-resolved optical waveforms at 777.4 nm and electric-field changes produced by lightning flashes were measured aboard a U2 aircraft flying above clouds at the same time that ground-based lightning measurements were carried out. The pulse shapes and intensities of IC and CG flashes, as viewed from above cloud, were found to exhibit remarkably similar waveshapes, radiances, and radiant energy densities. The median radiance at cloud top was found to be about 0.007 W/sq m per sr, and the median energy density about 0.000003 J/sq m per sr.
Document ID
19890045424
Document Type
Reprint (Version printed in journal)
Authors
Goodman, Steven J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Christian, Hugh J. (NASA Marshall Space Flight Center; Universities Space Research Association, Huntsville, AL, United States)
Rust, W. David (NOAA, National Severe Storms Laboratory, Norman OK, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1988
Publication Information
Publication: Journal of Applied Meteorology
Volume: 27
ISSN: 0894-8763
Subject Category
METEOROLOGY AND CLIMATOLOGY
Funding Number(s)
CONTRACT_GRANT: NASA ORDER H-39299-B
CONTRACT_GRANT: NAS8-37140
Distribution Limits
Public
Copyright
Other