Leader Studies with the Los Alamos Sferic Array
LAUR-01-4198
Leader Identification
The routine
identification of LASA records with leader signature is nearing
completion. Only stations within 50-350 km to the event are
considered. The method used is wavelet analysis using a Coiflet
basis function. A specific scaling which emphasizes the leader,
while retaining the return stroke and attenuating most local
noise sources is used. If the leader to return stroke relative
amplitude is > .25 for any station, then station pairs
are cross-correlated. If the cross-correlation is >.8
then the event is determined to have leader signature within the
record. Three examples of the state of current leader identification are presented below.
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