High-speed camera observations of negative ground flashes on a millisecond-scale

Details High-speed camera observations of negative ground flashes on a millisecond-scale High-speed camera observations of negative ground flashes on a millisecond-scale

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3223802b&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 23, CiteID L23802

Physics

14

Atmospheric Processes: Atmospheric Electricity, Atmospheric Processes: Lightning, Atmospheric Processes: Instruments And Techniques

Scientific paper

A study of cloud-to-ground lightning characteristics based on high-speed camera observations of 455 flashes related to 40 thunderstorms is presented. The Brazilian Lightning Location Network (RINDAT) was used to calculate the polarity and the distance of the flashes to the camera. In some cases, a fast electric field flat antenna was also used to calculate the time difference between strokes on a microsecond-scale. Some general features of the data set are briefly presented. This paper is focused on two specific characteristics observed in video records with a frame a rate of 1,000 frames/s: (i) six strokes presenting two ground terminations that were simultaneously connected for some milliseconds, (ii) and a high number of continuing current occurrences with durations less than 10 ms.

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