Mills@udel.edu (10/08/90)
Folks, How can all these tickers be out at the same time? The receivers on the east coast are doing fine and they are the furthest from the transmitter. Dave ----- Forwarded message # 1: Received: from louie.udel.edu by huey.udel.edu id aa03936; 7 Oct 90 17:25 EDT Received: from trantor.umd.edu by louie.udel.edu id aa05105; 7 Oct 90 17:23 EDT Received: by trantor.umd.edu (5.64/1.34) id AA14058; Sun, 7 Oct 90 17:16:42 -0400 Received: from hermes.chpc.utexas.edu by trantor.umd.edu (5.64/1.34) id AA14054; Sun, 7 Oct 90 17:16:36 -0400 Received: by hermes.chpc.utexas.edu (5.61/SMI-3.2) id AA09113; Sun, 7 Oct 90 16:16:47 -0500 Date: Sun, 7 Oct 90 16:16:47 -0500 From: Bill Jones <jones@hermes.chpc.utexas.edu> Message-Id: <9010072116.AA09113@hermes.chpc.utexas.edu> To: ntp@trantor.umd.edu Subject: What happend fuzz.sdsc.edu, truechimer.cso.uiuc.edu, ncarfuzz.ucar.edu and wwvb.isi.edu and probly other WWVB clocks are all running at stratum 2 and have a lot of baddata errors? Bill Jones UT SYSTEM CHPC ----- End of forwarded messages
CASNER@VENERA.ISI.EDU (Stephen Casner) (10/08/90)
Dave, I don't know why, but my Spectracom receiver is UNLOCKed, i.e., not hearing WWVB. In fact, I'm running the experiment I mentioned to you, so I have two receivers hooked up, and both are unlocked. They have been in that condition long enough that they have drifted apart by two seconds. Perhaps WWVB uses a collection of antennas each radiating in a different direction, rather than one omnidirectional antenna? Or some really strange atmospheric condition? -- Steve -------
Mills@udel.edu (10/08/90)
Steve, Beats me. In the scheme of things a 60-kHz directive array would probably represent a significant hazard to air navigation. However, I don't know how else to explain the situation. Is your receiver in phase lock, as against timecode okay? Dave
CASNER@VENERA.ISI.EDU (Stephen Casner) (10/08/90)
Dave, Both receivers have lost phase lock, not just timecode sync. Regarding the antenna hypothesis: I see in "NBS Special Publication 432" that the WWVB antenna "is a 122-meter, top-loaded vertical installed over a radial ground screen". Doesn't sound directional to me. -- Steve -------
Mills@udel.edu (10/08/90)
Steve, Things still look okay here, although your radio still shows "?". I note that both umd1 and apple show rather large offset errors in the hundreds of milliseconds, although both show stratum one. Also, istd at SRI shows large errors, too. Hark, the chronons have landed! Dave
fair@APPLE.COM ("Erik E. Fair", Your Friendly Postmaster) (10/09/90)
Huh? At this hour, our billboard shows:
remote refid st when poll reach delay offset disp
==========================================================================
*127.127.3.0 .WWV. 0 25 64 376 10.5 -0.71 0.2
hpsdlz.sdd.hp.c apple.com 2 1 64 377 109.5 0.83 4.1
+pmax6.osf.org .WWV. 1 491 1024 376 161.1 2.72 3.1
norad.arc.nasa. wwvb.isi.edu 2 15 64 377 76.3 -754.12 519.3
hermes.chpc.ute .WWV. 1 34 64 376 149.4 -11.06 2.7
BITSY.MIT.EDU .WWV. 1 995 1024 337 176.1 -2.64 0.9
SW.MCC.COM .WWV. 1 964 1024 376 173.5 12.79 66.8
otc1.psu.edu .WWV. 1 628 1024 376 209.6 -9.55 3.0
gw.ccie.utoront suzuki.utcs.uto 2 544 1024 356 289.0 3.51 17.8
dcn6.udel.edu .WWV. 1 605 1024 373 467.3 -2.09 5.8
clepsydra.dec.c 0.0.0.0 16 never 1024 0 0.0 0.00 64000
+fuzz.sdsc.edu .WWVB. 1 438 1024 337 99.8 5.37 2.6
wwvb.isi.edu .WWVB. 1 199 1024 376 134.0 57.96 6.9
+ncarfuzz.ucar.e .WWVB. 1 950 1024 377 146.1 -3.15 2.2
dcn5.udel.edu .WWVB. 1 613 256 322 237.4 -1.16 504.5
+truechimer.cso. .WWVB. 1 945 1024 377 153.2 -4.59 4.0
umd1.umd.edu .WWVB. 1 949 1024 377 233.6 91.31 5.6
dcn1.udel.edu .WWVB. 1 326 512 352 232.0 -12.44 4.0
suzuki.utcs.uto .CHU. 1 481 1024 377 276.3 5.73 13.4
128.39.1.149 .ATOM. 1 241 64 170 490.0 30.57 7596.6
Kermit.Stanford HOLMES.LCS.MIT. 3 1003 1024 376 55.0 -4.05 1.6
largo.ig.com apple.com 2 43 64 376 66.6 -6.32 3.6
blake.u.washing apple.com 2 61 64 376 98.0 -0.15 1.3
olivej.ATC.Oliv apple.com 2 48 64 376 93.6 -10.64 4.0
NNSC.NSF.NET apple.com 2 38 64 376 157.6 -0.23 6.1
CS.ORST.EDU apple.com 2 51 64 376 235.4 -8.94 688.1
Hundreds of milliseconds off? I don't think so... Maybe what you saw
was a network routing anomaly?
Erik E. Fair apple!fair fair@apple.comjones@HERMES.CHPC.UTEXAS.EDU (Bill Jones) (10/09/90)
The WWVB just started working agein around 12 AM. BIll Jones
Mills@udel.edu (10/09/90)
Erik, Apple has returned to nominal offsets as of now. I don't doubt that routing troubles are at the root of the problem; however, of late those problems are getting more severe and, in the case of umd1, are severe enough for other primary tickers to toss the buggers out. Having said that, even umd1 is at the moment showing only nominal offsets. The trick now is to find the cause of the occasional warps. Finally, I note the strange west-coast warp of WWVB seems to have subsided and now all primary tickers have resumed joy of ion. That, too needs to be explained. Dave
Mills@udel.edu (10/09/90)
Erik, (really to Milo), Has norad.arc.nasa.gov sprung a hydrogen leak? Seems like 750-odd milliseconds is pretty far to space. That ticker shows stratum 2, which means its PSTI clock might also have come bum. ET fone home. Dave