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Re: 19990414: Feeding *AFOS* text products from AWIPS into LDM

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  • Subject: Re: 19990414: Feeding *AFOS* text products from AWIPS into LDM
  • Date: Thu, 15 Apr 1999 09:26:30 -0600 (MDT)
On Wed, 14 Apr 1999, Unidata Support wrote:

> 
> ------- Forwarded Message
> 
> >To: address@hidden
> >From: Randy Weatherly <address@hidden>
> >Subject: Feeding *AFOS* text products from AWIPS into LDM
> >Organization: NWS Western Region
> >Keywords: 199904142002.OAA00468 ldm LDAD AFOS
> 
> 
>      I am trying to find the best way to replace our AFOS -> LDM feed with 
>      an AWIPS -> LDM. 

Randy,

We call AWIPS, NOAAport, not to confuse you.  We use a system developed
at SSEC to inject the products into the LDM. Here's a URL:

http://www.ssec.wisc.edu/sdi/sdi.html


 I get the products out of AWIPS, over to our LDAD 
>      server.  The come over as files with the afos pil as a name.  From 
>      there I am running pqinsert and inserting them into LDM as feedtype 
>      afos.
>      
>      Is there a better way? 

If you are doing the direct product insertion, pqinsert is the correct
program.

 I've tried using pqing (pqing -f afos -) and 
>      piping the file to it.  That didn't work.

The pqing -f afos is expecting the stream to look like the raw afos stream
with the control chars, etc, not file structures.

  When I use pqinsert, there 
>      is no seq number assigned and I seem to get spurious errors when files 
>      are inserted that the product is already in the queue.

As a matter of fact, the SSEC system uses 999 for all the seq numbers. 
The LDM ignores duplicate products, installed to cut down on network
congestion.  

  It also 
>      doesn't show the WMO header when I watch the queue.  I don't know if 
>      this is significant.


This isn't significant as long as you can write the correct pqact entries
for the afos products.
>      
>      Since AFOS is going away, we have to come up with a good scheme for 
>      feeding these types of products into our LDM system.

There might be another alternative solution in a few months that will be
available to insert AWIPS into a LDM. There are 4 sites using the SSEC
system to feed the Unidata Internet Data Distribution system for over 5
months w/o any major problems.

Robb...


>      
>      Thanks in advance for help
> ---------------------------------------------------------
> Randy Weatherly            Unix Sys Admin
> address@hidden  National Weather Service
> 801-524-5120 x284              Western Region Headquarters/SLC UT
> ---------------------------------------------------------
> 
> 
> ------- End of Forwarded Message
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================