[GEMPAK #HXL-206768]: (No Subject)

Hi Jennie,

Tom here...

I just wanted to blast you a quick note to let you know that Chiz is currently
putting on a GEMPAK training workshop, so he is not available to get back to
you at the moment.

re:
> I have been running a very limited version of GEMPAK on a linux box here,
> was just retrieving Conduit GFS grids from the host of idd.unidata.ucar.edu.
> I don't really have to have those high resolution global grids right now,
> but would like to try to configure GEMPAK to get the NAM along with
> satellite imagery (MCIDAS feed?) and upper-air data, maybe radar and surface
> data as well (I am not sure how much space this will chew up if I only keep
> a day or so?).

> Anyway, will I need to get a new upstream host for these
> additional data streams or can I make these requests from the host I
> currently point to?

You can feed from either idd.unidata.ucar.edu or idd.cise-nsf.gov.  Sometime
in the not too distant future, we may be asking you to request your data
feeds from Penn State.  Just a heads-up...

> I will be trying to figure out how to change the pqact
> to appropriately direct these to the GARP defined locations, but the first
> question is just getting the right data feeds set up.

Chiz provides pqact.conf files with the GEMPAK distribution that process
data in a way that is directly usable by GEMPAK routines.  What you need
to do to create the GEMPAK pqact.conf files is:

<login as 'gempak'>

cd ~gempak

-- make sure that you have setup the necessary line in the ~gempak directory
   and defined any/all environment variables in your shell-specific 
configuration
   file (e.g., .cshrc for the C shell; .bash_profile for BASH; etc.)

$NAWIPS/ldm/etc/gen_pqact.csh             <- if you are using the C shell

This process is explained in the GEMPAK page:

Site Configuration for Products
http://www.unidata.ucar.edu/software/gempak/GEMPAK/configuration.html

The gen_pqact.csh script will ask you if you want all of the actions in one 
file.
The best answer to this is NO.  Let the script create multiple files and then
follow the instructions on the screen that tell you the 'exec' actions you need
to add to your ~ldm/etc/ldmd.conf file.  The instructions also let you know that
you need to copy the just generated pqact.conf files to the ~ldm/etc directory.
Also, you will need to make sure that you copy all of the GEMPAK decoders
to a directory that is in the PATH of your 'ldm' user.  A "typical" setup
is to copy the decoders to the ~ldm/decoders directory (create the directory
if it does not already exist), and make sure that this directory is included
in the PATH for the user 'ldm'.

If you had to add the directory to the PATH definition for 'ldm', you will
need to make sure that it is active.  For C shell users, this means that you:

- modify the PATH setting in .cshrc
- 'source' the .cshrc file:
source ~ldm/.cshrc

Once your PATH is correct and complete, and after you have modified the
~ldm/etc/ldmd.conf file and copied the GEMPAK pqact.conf files to the
~ldm/etc directory, you will need to stop and start (restart) your LDM:

<as 'ldm'>
ldmadmin stop
ldmadmin start

  -- or --

ldmadmin restart

> I am still running
> the ldm6.4.4, and there is a newer version out, but I would rather wait
> until classes are over before I upgrade any software.

The upgrade from LDM-6.4.4 to LDM-6.4.6 is painless.  I would recommend
doing the upgrade before the end of the semester since this distribution
contains a bugfix that may be important to you.

Here is an ABC for upgrading:

<login as 'ldm'>
cd ~ldm
ftp ftp.unidata.ucar.edu
  <user> anonymous
  <pass> address@hidden
  cd pub/ldm
  binary
  get ldm-6.4.6.tar.Z
  quit
zcat ldm-6.4.6.tar.Z | tar xvf -
cd ldm-6.4.6/src
./configure
make
make install
sudo make install_setuids        <- last step needs to be done as root, hence
                                    the 'sudo'.  If you don't have sudo 
installed
                                    simply 'su' (not 'su -' to root)
cd ~ldm
ldmadmin stop
rm runtime
ln -s ldm-6.4.6 runtime
ln -s runtime/* .                <- this step should not be needed, but it 
can't hurt
ldmadmin start

That's it.  An LDM upgrade should take you no more than 15 minutes.

> thanks for you help,

I am going to close this ticket in anticipation that I fully answered
your question(s).  If you have further questions about the same topic,
please include the Support ticket ID (HXL-206768) in your next email's
Subject: line. The ticket will be automatically reopened, and Chiz will
be able to jump in and provide expert advice.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: HXL-206768
Department: Support GEMPAK
Priority: Normal
Status: Closed