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Fast Field Changes Produced by Positive Ground Strokes,
TOKYO UNIV (JAPAN) INST OF INDUSTRIAL SCIENCE*
Fast electric and magnetic field changes produced by positive ground strokes in Japan were recorded with the output of a slow antenna. High rate of positive ground flashes was recorded not only in winter but also in spring, and the fraction of positive ground flashes in a storm was known to correlate with the radar echo top instead of the vertical wind shear. The characteristics of the wave shape of the fast field changes of a positive ground flash and the difference from that of a negative ground stroke is stated, and the possible causes are discussed. Author
This article is from 'International Aerospace and Ground Conference on Lightning and Static Electricity (8th): 'Lightning Technology Roundup,' held at Fort Worth, Texas on 21-23 June 1983,' AD-A135 100, p82-1 thru 82-7.