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20010815: gempak


---------- Forwarded message ----------
Date: Wed, 15 Aug 2001 13:21:02 -0600
From: Unidata Support <address@hidden>
To: Dorothy Durnford-Sutton <address@hidden>
Subject: 20010815: gempak

>From: Dorothy Durnford-Sutton <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200108151603.f7FG3Z119768

>Hi Steve,
>
>I'm a Masters student at McGill University, with a thesis due August
>31!  I have 3 questions - I have asci text format sounding data.  How do
>I format it so that snprof, snlist etc. can work with it?  I have
>satellite data, supposedly in gempak format, which I'm supposed to view
>using GARP.  I type 'GARP', get a screen with all sorts of options,
>except some way, as far as I can make out, of loading my file.  So, how
>do I load files?  Finally, I have plotted surface data using sfparm =
>wthr.  I have a WMO chart for all the symbols, but I can't find one of
>the plotted symbols.  It's like an empty round circle, with short arms
>protruding horizontally or vertically.  What weather do these represent?
>
>Thanks, Dorothy.
>
>

Dorothy,

The format that SNLIST outputs is the format that SNEDIT needs for
importing a sounding into a GEMPAK data management file so that
you can run snprof, snmap etc. You would create an empty upper air file
using SNCFIL, and then run SNEDIT to read your ascii data into the
gempak file.

Garp, NSAT, and NMAP use the $SAT directory tree to locate satellite
image files. See the tutorial on the directory tree structure for
the gui programs at:
http://www.unidata.ucar.edu/packages/gempak/tutorial/nsat.html
You can place the directory tree anywhere and define teh $SAT environmental
variable accordingly.

In Garp, the subdirectories under $SAT for the pop-up widget buttons
are defined in the "sat" keys in $GARPHOME/defaults/Garp_defaults.
If you are not using one of the directory names that Garp expects, eg GOES-8,
GOES-10, etc, then you have to add that name to the configuration.

NSAT provides the "User Defined" widget under the FILE pull down that
lets you browse your disk for the files without having the $SAT tree created.

The weather symbol reference is provided in Appendix C of the User Guide.
If you don't have the user manual, the PDF online copy is available:
http://www.unidata.ucar.edu/packages/gempak/GEMPAK5.6/doc/pdf/
The description of a circle with horizontal or vertical lines sounds like
numbers 1, 2, or 3 which would be a synoptic code report of cloud formation.
You can use the SFPARM as WNUM or WWMO in sflist to output the code value that
is being used to create the WSYM.


Steve Chiswell
Unidata User Support