[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 19990802: IDD feed site request from Plymouth State

On Mon, 2 Aug 1999, Unidata Support wrote:

> 
> ------- Forwarded Message
> 
> >cc: address@hidden
> >From: Jim Koermer <address@hidden>
> >Subject: IDD Request
> >Organization: Plymouth State
> >Keywords: 199908021449.IAA24828 IDD feed
> 
> Hello,
> 
> I would like to request a new IDD feed site. You have probably seen my
> latest comment on frequent lack of McIDAS GOES AREA files. it has been
> exasperating. These problems have existed at UIUC (my primary feed) for
> nearly two months and no action seems to have been expended there to
> resolve the problem. I've sent e-mail and gotten no responses from them. 

Jim,

I can understand your frustration about the reliability of the data. But,
I can't say I understand your comments about the UIUC and UMICH.  Both
sites have been in contact with UPC and both sites are working on
site/network type of problems. The problem is with the network around the
Chicago area, not the sites.  Also, you state that traceroute looks good
to both these sites, that may be. But traceroute are one shot deals, they
can be passed through without delay on a network that is flaky or
congested. It is hard to get a true reading of the network but I have
doing a "ldmping -i 5 -h <host>" and watching the results for hours. The
time should be in the 100th of a second, most likely you will see
fluxuation from 100th to 300-600 seconds. This causes problems especially
with larger products because broken connections means the complete
product needs to be resent.  For real time data, run the ldmprods script.
There's a man page on it.

For your request for a new feeder site, the NE has the worst network
reliability in the US. I suggest you try ldmpings/traceroutes to other
sites in the late afternoon. You can use the topo chart at:
http://www.unidata.ucar.edu/projects/idd/status/idd/fosTopo.html
ideas.  Don't pick 1st tier sites and sites that are overloaded.

Robb...
 > 
> As a result, I have been using UMICH (my secondary feed) over much of
> this period, but lately there have been similar problems with that feed.
> 
> Traceroutes have been looking quite good to these sites, but nobody
> seems to be minding the store at either of these sites on a reliable
> basis. It also doesn't really matter how good the connection is, if we
> can't depend on the data, it's of little use and the satellite imagery
> is the most important product that we receive over the IDD, especially
> during the hurricane season.
> 
> We are in the process of going out to bid for a full NOAAPORT system
> that should provide us with more reliable GOES data, but in the
> meantime, we kindly request a new primary feed until UIUC can get some
> things corrected. We'd like to keep UMICH as a secondary.
>                                       
>                               Jim
> -- 
> James P. Koermer             E-Mail: address@hidden
> Professor of Meteorology     Office Phone: (603)535-2325
> Natural Science Department   Office Fax: (603)535-2723
> Plymouth State College       WWW: http://vortex.plymouth.edu/
> Plymouth, NH 03264
> 
> 
> ------- 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/
===============================================================================