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I checked that as well for that day/time, I have the same gaps. Gilbert I may have missed some in the email I gave you, the file had just restarted it turns out. Ray Weber MA Skywarn -----Original Message----- From: Gilbert Sebenste <sebenste@xxxxxxxxxxxxxxxxxxxxx> To: Mike Schmidt <mschmidt@xxxxxxxxxxxxxxxx> Cc: ldm-users@xxxxxxxxxxxxxxxx Date: Wed, 14 May 2008 10:10:28 -0500 (CDT) Subject: Re: [ldm-users] Those with direct satellite feeds of NOAAport... On Wed, 14 May 2008, Mike Schmidt wrote: Hi Mike, This is the post I was looking for... > Gilbert, > > For what it's worth, we hardly ever have a day free of Gap messages. > On the day you cited, May 11th for example, we have six Gaps; > > May 11 11:01:58 burns dvbs_multicast[2328] ERROR: Gap in SBN last 5921901, this > 5921922 > May 11 12:10:48 burns dvbs_multicast[2327] ERROR: Gap in SBN last 19263061, > this 19263064 > May 11 12:16:58 burns dvbs_multicast[2327] ERROR: Gap in SBN last 19278632, > this 19278634 > May 11 14:56:20 burns dvbs_multicast[2330] ERROR: Gap in SBN last 5000158, this > 5000160 > May 11 20:13:33 burns dvbs_multicast[2330] ERROR: Gap in SBN last 5263333, this > 5263336 > May 11 22:56:57 burns dvbs_multicast[2327] ERROR: Gap in SBN last 21252753, > this 21252755 > > We feed directly from a 3.8m heated NWS installed and maintained > NOAAport dish installed for COMET. Other than local terrestrial > interference, a truck driving in front of the dish (it's possible > with the installation here), or a solar eclipse, the data reception > should be about is good as it gets. OK. I had 40 that day, but we also had 45 MPH winds and heavy rain. That certainly didn't help. I know that our struts vibrate in high wind slightly, and I suspect that might be a problem (we are ordering heavy-duty struts to replace the ones we have there now). But outside of that... > We have found that the Gap messages we see are usually consistent > system-wide. In other words, the majority of the Gaps we see here in > Boulder are the same ones that SSEC and LSU see. Check your data for > May 11th and see if you have the above six Gaps in your logs. Yes, I do. > Otherwise, you may have additional issues to find and resolve which > can include anything from temperature and moisture sensitivities in > the LNB and cabling, all the way down to overflowing buffers, too > many interrupts or a bad driver for the ethernet interface. > > Here's a week's worth of our recent Gap history; > > May 07 25 > May 08 28 > May 09 35 > May 10 9 > May 11 6 > May 12 95 > May 13 23 > > Hope that helps. > > mike That's better! That's what I am typically seeing, or very close to it. With a 12' dish, a Norsat 3120 LNB and a Novra box, I should be smokin', especially with a variable bit error rate one level better than standard. I will try one more thing: my Novra box is 5" away from the computer; I'll try moving it off the computer stand and see if that helps any. I'm using quad-shielded RG-6, but you know how much computers spew RF... :-) Looks like I'm trying to make a problem where none exists. Thank you for the verification. ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** Staff Meteorologist, Northern Illinois University **** E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx *** web: http://weather.admin.niu.edu ** ******************************************************************************* _______________________________________________ ldm-users mailing list ldm-users@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
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