Determining lightning polarity (positive or negative) by raw signal processing?
Cutty ,
seems that I am a bit better than 50%, so its not only guessing... It was also a bit hard with the weak signal of the C channel. I propose to use the H channels (preferably A and B) ONLY to define the start of the signal; then the polarity of the E field peak at the start defines the polarity of the stroke. No comparison of the phase of A or B with the E field intended.
This procedure works only if the start can be identified clearly giving us the ground wave and if the E field signal is clean. Also this can only work on a part of the signals, when there are cload discharges everything becomes muddled. Anyway, this is my proposal and we can see if it works and when.
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