Boltek Lightning/2000 - Manual (Page 220)

L I G H T N I N G / 2 0 0 0
220 220 220 220
Sources of noise aren't always nearby or easy to identify. A
Lightning/2000 user in Texas identified a persistent source of
noise as belonging to huge electric motors at a pulp mill 100
miles away!
Range Determination
When Lightning/2000 detects lightning, the lightning strokes
are examined to determine if they are occurring within storms.
The range of a storm from the lightning detector is
determined based on the characteristics of the lightning
strokes that make up the storm.
While the range determination procedure isn't perfect,
reasonably good results are achieved most of the time. We
are constantly striving for ways to improve the range
determination process.
A "storm" is displayed in the Analysis window as a wedge-
shaped box (the "range box"). The range box shows where
the storm is likely to be.
"Distant" storms are those storms where the inner edge of the
range box is beyond the yellow alert range.
"Regional" storms are those storms where the inner edge of
the range box is inside the yellow alert range, but outside the
red alert range.
"Nearby" storms are those storms where the inner edge of the
range box is inside the red alert range.
It is quite possible for a storm’s range to be determined
incorrectly, especially when there are very few strokes
available for analysis.