Abstract:
The position reconstruction of the point of strike of cloud-to-ground lightning flashes in
several thunderstorms recorded by two-wideband magnetic direction finding stations is
presented. Lightning activity data show a clear peak around 18.00 hours, which is a
characteristic feature of the Northeast monsoon thunderstorms in Sri Lanka. It is shown that
the accuracy of the position reconstruction with two stations is heavily dependent on the
difference in the angles measured by the stations. A technique that utilizes the measured
strength of the flashes was introduced to improve the accuracy of the position
reconstruction. With this technique, the point of strike of ground flashes can be localized
with an accuracy of better than 5 km within a 100 km radius around Colombo (6.90N,
79.86E), except in the vicinity of the line joining the two stations.
