Evaluation of lightning location system over Johannesburg by high-speed cameras
Date
2019
Authors
Fensham, Haydn Gareth
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
This research describes an approach to evaluating the performance of the South
African Lightning Detection Network (SALDN) over Johannesburg, South Africa,
using high-speed video footage of lightning events. The performance evaluation
includes the
ash detection e ciency, stroke detection e ciency and median lo-
cation accuracy (locations of known attachments and
ash cluster approach) of
the SALDN. The proposed methodology has three subsections: time-correlating
cloud-to-ground stroke data from the SALDN with ground truth lightning events
(high-speed camera footage), determining the detection e ciency and determining
the location accuracy. Results indicate that the SALDN has a
ash detection ef-
ciency of 84.9 %, stroke detection of 69.1 % and has a median location accuracy
of 59.2 m and 124.4 m using locations of known attachments and
ash cluster
approaches respectively for cloud-to-ground lightning over Johannesburg.
Description
A dissertation submitted in fulfillment of the requirements
for the degree of Master of Science
in the
lightning/EMC research group
school of electrical and information Engineering
August 2019