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20051102: nexrad2

>From: address@hidden
>Organization: UND
>Keywords: 200511030431.jA34Vl7s003769 IDD NEXRAD2

Hi Rhesa,

>We seem to have stop receiving the nexrad2 data feed.  Do you know if
>there is a problem with the feed, or is it on our end?

I used the Unidata real time stats pages to trace the flow of
NEXRAD2 data to UND:

http://www.unidata.ucar.edu/software/idd/rtstats/siteindex.php

adiabat.rwic.und.edu
http://www.unidata.ucar.edu/software/idd/rtstats/siteindex.php?adiabat.rwic.und.edu

  NEXRAD2 topology
  
http://www.unidata.ucar.edu/software/idd/rtstats/iddstats_topo_nc?NEXRAD2+adiabat.rwic.und.edu

to find that you feed from whirlwind.aos.wisc.edu

I used the same pages for whirlwind to see that it feeds from
wisc.weather.purdue.edu.  Unfortunately the last site does not provide
stats.  We do know, however, that the top level relay at Purdue
for NEXRAD2 data is castor.itap.purdue.edu which is sending in stats:

castor.itap.purdue.edu
http://www.unidata.ucar.edu/software/idd/rtstats/siteindex.php?castor.itap.purdue.edu
  
A quick look at the latency, volume, or products plots for castor show
that it stopped sending NEXRAD2 data near 0Z last night.

We received a note from another toplevel NEXRAD2 relay indicating a
problem getting data from the Western Region:

  Subject: IRaDS STATUS ALERT ... Western Region Outage
  To: Unidata <address@hidden>
  Date: Thu,  3 Nov 2005 00:55:00 -0600 (CST)
  
  We are experiencing an outage of NWS Western Region Level II data.  We
  are not able to ldmping the server however we are able to trace route
  through I2. The National Weather Service has been informed.  We will
  keep you informed if the problem continues to occur.
  
  Elsewhere, IRaDS data continues to flow normally.
  
  -----------------------------------------------------
                       Integrated Radar Data Services
                         address@hidden
            http://www.radarservices.org   1-866-33IRADS

This note indicates that we should be seeing an outage of all radars
that are collected by the NWS Western Region Headquarters, but that
all other regions should be OK.

So, the problem is apparently at the Purdue toplevel NEXRAD2 relay
at least for all radars except the ones from the Western Region.

Purdue will be contacted to investigate the problem.

>Rhesa Freeman
>Data Manager
>Regional Weather Information Center
>University of North Dakota

Cheers,

Tom Yoksas
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