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We present statistical data on the risetime of lightning current pulses in negative upward flashes measured on the Säntis tower in 2010 and 2011. Two different definitions were used to determine the current risetime. The first is the t10–90 rise time usually adopted in lightning applications and lightning standards. The second one is the risetime associated with the maximum rate of rise tmr given...
We present an analysis of measured current waveforms associated with positive and bipolar flashes recorded on the Säntis tower, Switzerland, from May 2010 till January 2012. The overall number of recorded flashes in the considered period was 201, of which 30 were of positive polarity (effectively transported positive charge to ground) and three were bipolar. The recorded positive flashes were mainly...
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