Ik twijfelde nu ook, maar op een forum van lightningmaps vond ik volgende antwoorden terug op soortgelijke vraag
"the smaller the 'deviation' circle, the better 8 or more stations agreed on a 'location' based on GPS timing at stroke arrival at those stations. The smaller the circle, the closer the timing computations resolve. Not to be confused with the
"eye-candy" (if you will) moving thunder sonic front approximation (if enabled) on some 'real-time' maps..."
en ook:
"Blitzortung RED system detects Cloud to Ground, and the occasional 'cloud to cloud, or inter-cloud' sferic. As well as rare 'false' detections. The dots do indicate that (generally) 8 - 20 or more stations detected a discharge, within a very tight (micro-seconds) GPS based timing reference, and the 'timing' deviation errors that are computed / averaged are illustrated with that 'dot' in the center... the smaller the 'circle' the lesser computed deviation. (possible location error). "
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