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[GEMPAK #NZZ-240543]: Several questions

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

If you are using SFMAP to plot nldn lightning strikes, you can specify the 
exact time down to 5-min intervals using DATTIM.

Using the GEMPAK tutorial example below ( 
http://www.unidata.ucar.edu/software/gempak/tutorial/answers/exam_5.html ), you 
can see that the variable HOUR is incremented by one for each "while($HOUR <= 
$STOP_HOUR)" loop (as is the variable COLOR).

--------------------------

set HOUR = 20
set YMD = 20100614

@ MIN = 0
@ STOP_MIN = 30

@ COLOR=30


while($MIN <= $STOP_MIN)

   if($MIN < 10) then
      set SFTIME=${HOUR}0${MIN}
   else
      set SFTIME=${HOUR}${MIN}
   endif 

   set FILE=201006142000_nldn.gem
   set TIMES=`sfctime $FILE`

   foreach TIME ($TIMES)
      sfmap << EOF
      map = 1
      dev = XW
      proj = nps
      area = dset
      filter = no
      clear = no
      text = 1.2/23/1/hw
      title = 5/-1/Lightning Strikes ${SFTIME}Z
      panel = .02;.02;.97;.97/1/1/4
      sffile = $FILE
      sfparm = sgnl;mark:15:4:1
      color = 0;${COLOR}
      dattim = $TIME
      r
   
      e
EOF
      @ MIN = $MIN + 5
      @ COLOR = $COLOR - 1
   end
end

--------------------------


* note that variable SFTIME is only used here to write the TITLE - each 5-min 
interval is accounted for by the "foreach TIME ($TIMES)" control structure.

* also note that TITLE is going to overlap itself for each 5-min interval and 
it's position will need to be accounted for if you wish to customize titles and 
labels.







> Third question involves plotting lightning data.  I used the example scripts
> on the Gempak tutorial page to help me put together a script to plot the
> lightning data at hourly intervals.  I would like to see a script of how to
> plot the data at 1, 5, and 15 minute intervals.  I am not sure how to
> proceed an am a little confused here with how to set up the script to
> display this.  I'm getting the files at 30 minute intervals but within each
> file you can break down the intervals to at least 5 minutes (I'm hoping for
> 1 minute as well).  So if you could help me on this that would be great.
> 
> 

Ticket Details
===================
Ticket ID: NZZ-240543
Department: Support GEMPAK
Priority: Critical
Status: Open