But I don't know how much of that energy goes into the arc (a 22"
single shot ground strike, connecting with the target at ~120us, in
this case) and how much gets dissipated as heat in the coils.
You could use the same method as I did but using Terry's fibre optic
probes to measure topload voltage and breakout point current. However
it's a lot harder to get a meaningful power measurement because the
streamer draws a noisy high frequency pulsed current. The crest
factor must be insane.