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Re: LDM question...
- Subject: Re: LDM question...
- Date: Mon, 22 Mar 1999 11:13:52 -0700 (MST)
Alaric,
FOS and NOAAport are not identical at all because the sequence nunbers
don't match. The LDM uses a md5 check sum on each product including the
sequence numbers, so the products appear different to the LDM.
So you will get product duplication. You have to make a choice to use
only one feed. Also, don't request the FOS from Alden, UPC has terminated
that contract in Jan.
Robb...
ps I was out of the office last week.
On Tue, 16 Mar 1999, Alaric S. Haag wrote:
> Robb,
>
> Hope you're the right one to turn to... I manage the LDM site on
> sirocco.srcc.lsu.edu, and have been able to deal with most problems,
> but...I fear that at the time that some of the NOAAport changes were
> made to the IDD data stream, I may have missed something. I've been
> reviewing old Email, but can't find anything but a few passing
> references regarding product duplication problems. Previously we had
> been feeding from alden with the line:
>
> request WMO ".*" lightning.alden.com
>
> One of the posts during the NOAAport changes directed sites feeding
> from Alden to switch over to thelma.ucar.edu, so I now have:
>
> request WMO ".*" thelma.ucar.edu
>
> In addition however, we have a KU feed of the DDPLUS products from a
> dish on the roof that has served as backup for our net feed on
> sirocco. This has worked well, but once I switched over to feeding WMO
> from thelma, I'm seeing product duplication. The request line for the
> dish feed is:
>
> request DDS|PPS ".*" samoon.srcc.lsu.edu
>
> >From the incoming stream behavior (via ldmadmin watch) it seems clear
> that LDM is not seeing the products from the KU system as "identical".
>
> Mar 16 20:38:04 pqutil: 137 19990316203802.510 DDPLUS 668 SNVD17 CWVR
> 162000
> Mar 16 20:38:04 pqutil: 137 19990316203811.575 IDS|DDPLUS 999 SNVD17
> CWVR 162000
> Mar 16 20:38:04 pqutil: 3121 19990316203806.000 DDPLUS 669 FPCN14 CWXK
> 162029
> Mar 16 20:38:04 pqutil: 192 19990316203806.100 DDPLUS 670 SRUS56 KWBC
> 162036
> Mar 16 20:38:04 pqutil: 3121 19990316203811.592 IDS|DDPLUS 999 FPCN14
> CWXK 162029
> Mar 16 20:38:04 pqutil: 192 19990316203811.595 IDS|DDPLUS 999 SRUS56
> KWBC 162036
> Mar 16 20:38:04 pqutil: 2629 19990316203808.720 DDPLUS 671 SRUS51 KWBC
> 162036
> Mar 16 20:38:04 pqutil: 381 19990316203808.920 DDPLUS 672 SRUS51 KWBC
> 162036
> Mar 16 20:38:04 pqutil: 128 19990316203808.990 DDPLUS 673 SPCN43 CWAO
> 162035
> Mar 16 20:38:04 pqutil: 477 19990316203811.598 IDS|DDPLUS 999 SRUS52
> KWBC 162036
> Mar 16 20:38:04 pqutil: 114 19990316203809.050 DDPLUS 674 SPCN46 CWAO
> 162035
> Mar 16 20:38:04 pqutil: 254 19990316203811.605 IDS|DDPLUS 999 SRUS52
> KWBC 162036
> Mar 16 20:38:04 pqutil: 213 19990316203809.160 DDPLUS 675 SRUS51 KWBC
> 162036
> Mar 16 20:38:04 pqutil: 536 19990316203809.440 DDPLUS 676 SRUS54 KWBC
> 162036
>
> The old Emailings also refer to a FOS filter that would reduce the
> incoming product set, but I get the impression that would exclude
> products rather than remove the duplication. The only other request
> lines on sirocco are for the MCIDAS and FSL2 streams.
>
> Lots to "ingest" there :) and I suspect it's a simple tree within the
> forest. Any help is greatly appreciated!
>
> --
> Kind regards,
> Ric
>
> [ Alaric S. Haag, Computer Manager mailto:address@hidden ]
> [ Coastal Studies Institute - Earth Scan Lab Voice: (225) 388-6438 ]
> [ Louisiana State University FAX: (225) 388-2520 ]
> [ Baton Rouge, LA 70803 http://www.esl.lsu.edu ]
>
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===============================================================================
Robb Kambic Unidata Program Center
Software Engineer III Univ. Corp for Atmospheric Research
address@hidden WWW: http://www.unidata.ucar.edu/
===============================================================================
