Boltek Lightning/2000 - Manual (Page 170)

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happen in particular when a small storm first appears, or
when the stroke rate is low.
Storm’s angular influence
Storms that are close to one another in azimuth tend to be
ranged in a similar fashion. This can lead to range problems
when storms are not associated with an organized area of
thunderstorms.
The angular influence is expressed in degrees. By setting it to
a particular value, you are telling Lightning/2000 to consider
storms within that number of degrees of azimuth when
calculating the range of the storm in question.
When this value is lowered, storms that are near each other
will be less tightly tied to each other's range. A lower value in
this field tends to "decouple" storms from the influence of
their neighbors and give them their own range.
Lowering this value too much can be a double-edged sword.
You may end up with a bunch of apparently disconnected
storms at wildly different ranges without meaning to.
Storm’s time influence
A storm's range is determined in part by using the range of
storms that have been detected in the same direction within
the last few minutes. A lower value for the time influence
causes only the most recent storms to be used in the ranging
algorithm. Setting the time influence to zero causes storms to
be ranged without reference to recent storms in the same
direction.