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Re: Noaa Weather Wire Service

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  • Subject: Re: Noaa Weather Wire Service
  • Date: Thu, 21 Sep 2000 11:21:13 -0600 (MDT)
On Thu, 21 Sep 2000, David K. Magee wrote:

> 
> Hello, we've finally received our new Noaa Weather Wire Service
> receiver.
> 
> On the old system, product headers were in the PIL format (NEWSWRLA).
> In order to get LDM to ingest under the old system,
> I had to use this entry in my ldmd.conf
> 
> exec    "afos -v -b 4800 -p none /dev/ttya"
> 
> On the new system, they have switched to WMO headers, and the baud rate
> has increased to 9600bps.  I've tried a few variants
> of entries in my ldmd.conf with different results:
> 
> exec    "afos -v -b 9600 -p none /dev/ttya"  - works fine, but labels
> the data stream as AFOS, but the products have WMO headers.
> 
> 
> exec    "ddplus -v -b 9600 -p none /dev/ttya"  - again, it seems to work
> fine, however, I get occasional errors reported in the ldmd.log
> file:
> 
> Sep 20 19:54:02 gargoyle pqact[9504]:                file: -overwrite
> -strip -close data/files/ASUS41.KBUF
> 
> Sep 20 19:54:06 gargoyle ddplus[9505]: Lone ETX
> error                       1455 -01  ZCZC00 BUFS 201954
> 
> Sep 20 19:54:07 gargoyle ddplus[9505]:     1331 20000920195407.865
> DDPLUS 000 FPUS73 KAPX 201951 /pNOWAPN
> 
> Sep 20 19:54:07 gargoyle pqact[9504]:     1331 20000920195407.865
> DDPLUS 000  FPUS73 KAPX 201951 /pNOWAPN
> 
> Sep 20 19:54:07 gargoyle pqact[9504]:                file: -overwrite
> -strip -close data/files/FPUS73.KAPX
> 
> 
> So I have two questions:
> 
> 1) Is anyone using ingesting "new" NWWS data with LDM?

David,

Can't answer this question.

> 
> 2) What is a lone ETX error ?
> 

The ETX is an "end of text" error for a text product.  pqing was expecting
an #define ETX            0x03    /* ^C */ to terminate the product. I
suspect that your receiver is sending a garbled product to pqing once in a
while and then pqing is noting this in the ldmd.log files. I would check
the wires on the receiver and the hardware to improve the error rate.

Robb...



> I'm running LDM 5.1.2
> 
> Thanks for any ideas/comments/suggestions!
> 
> David
> 
> 
> 

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