LTNG is the ending valid time for lightning data, the time increments (in
minutes going back from the ending time) and the corresponding colors for
the lightning data, and the positive and negative markers to display.
End time|time increments/colors|positive marker/negative marker
The ending time is the latest time for which lightning data will be
plotted. The ending time is given as a GEMPAK date/time string. Any
missing items from the string will be filled in by the system time. The
ending time may also be LAST. LAST will use the system time and plot all
lightning data for the preceding times as defined by the time increments.
ALL is not accepted as an ending time for lightning data.
The time increments and colors may each be specified using either a list
separated by semicolons or a range in the form first-last-increment.
Time increments are given in minutes going back sequentially from the
ending time. The number of time increments must be the same as the
number of colors. If no time increment and color are given, a single
time increment of 5 minutes with a default color of red will be used.
If the range format is used for the time, an increment must be specified.
If the range format is used for the color and an increment is not
specified, an increment of one is used.
The marker data includes the marker type, size and width, separated by
semicolons. The default marker for positive strikes is a plus sign, and
for negative strikes a minus sign. Default marker size multiplier is
one, as is default width.
LTNG = 991130/2315|1/5
All lightning data will be plotted in yellow for times 2314Z
and 2315Z. Default marker values will be used.
LTNG = LAST
All lightning data for the preceding five minutes will be
plotted in red.
LTNG = ltng=991201/0000|10;20;30;90/2;17;5;3|4;1.5;2/6;2;3
Lightning data for 991130/2350 to 991201/0000 will be plotted
in red; for 2330 to 2349 in orange; for 2300 to 2329 in yellow;
and for 2130 to 2259 in green. Positive strikes will be
plotted as squares with a size multiplier of 1.5 and a line
width of 2; negative markers will be plotted as diamonds with
a size multiplier of 2 and a line width of 3.