Winter lightning on Japan Sea coast-development of measuring system on progressing feature of lightning discharge

Author

Yokoyama, S. ; Miyake, K. ; Suzuki, T. ; Kanao, S.

Author_Institution

Central Res. Inst., Electr. Power Ind., Tokyo, Japan

Volume

5

Issue

3

fYear

1990

fDate

7/1/1990 12:00:00 AM

Firstpage

1418

Lastpage

1425

Abstract

With the aid of recent optoelectronic techniques, the authors have developed a measuring instrument named ALPS (Automatic Lightning Discharge Progressing Feature Observation System) to determine the progress of lightning flashes. The progress velocities of stepped leaders for lightning in winter seasons were observed using the ALPS in the coastal area of the Japan Sea. The progress velocity of an individual step of a stepped leader can be expressed by a lognormal distribution and its mean value is 1.6×10⁶ m/s for upward leaders and 4.0×10⁶ m/s for downward leaders. The mean progress velocity of a total leader process is given as 0.8~2.7×10⁵ m/s for upward leaders and 2.9×10⁵ m/s for downward leaders

Keywords

atmospheric measuring apparatus; atmospheric techniques; lightning; ALPS; Automatic Lightning Discharge Progressing Feature Observation System; Japan; discharge; downward leaders; lognormal distribution; measuring system; optoelectronic techniques; progress velocities; stepped leaders; upward leaders; winter lightning; Cameras; Electric variables measurement; Fault location; Instruments; Lightning; Optical fibers; Power measurement; Sea coast; Sea measurements; Velocity measurement;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.57984

Filename

57984