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The electromagnetic signature of lightning strokes varies
and is different based on whether it is cloud to cloud, cloud to ground or
ground to cloud. A single detector and its processing software is unable to triangulate
on a potential strike and so various algorithms have been developed to try to
differentiate between electrical noise and actual strikes. Also because there
is no triangulation the distance of a strike is dependent on how close that
strike was to the "average" strength of a lightning strike. Strong
strikes at long distances may look as close as a weak strike at a closer
distance (or even closer). It provides a pretty reasonable interpretation of
lightning strikes and can provide meteorological information.
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