Re: A puzzle with internet time and NIST time
On 20121016_062545, John Hasler wrote:
> Paul E Condon writes:
> > Now I am running NTP.
>
> Does Ntp agree with your wall clock?
> --
> John Hasler
No. It displays the same offset into the future in reference to the
SkyScan clock.
Also, I have escalated my effort on this. I actually have three(3)
Debian boxes, all showing 6.0.6 in /etc/debian-version. At the moment
two are running Ntp, and one is running chrony. All show the same
offset to as much precision as I can muster eyeballing to displays at
once visually. Could there have been a recent change in NIST broadcast
signalling standard that my rather old SkyScan is not handling
properly? Very unlikely, I know. But if I say that the Debian displays
of internet time are actually correct/true/whatever and the SkyScan is
confused, that explains the situation. But is that believable? I don't
think so, at least, not believable to this aging physicist who has had
knowledge of NIST since childhood when it was located inside
Washington, DC, and was called the Bureau of Standards. The facility
in Boulder did not yet exist then. There is a continuity of existence
that makes such a speculation silly to me. The info from the three systems:
root@gq:~# ntpq -pn
remote refid st t when poll reach delay offset jitter
==============================================================================
+69.164.206.65 64.6.144.6 3 u 53m 1024 370 27.341 6.008 2.071
+69.122.22.85 209.51.161.238 2 u 50m 1024 374 97.619 16.028 3.403
*199.249.223.123 129.7.1.66 2 u 531 1024 377 35.028 -4.194 3.941
-24.149.253.214 208.90.144.53 3 u 493 1024 377 91.515 15.938 1.545
root@gq:~# less /etc/ntp.conf
root@gq:~# cat /etc/debian_version
6.0.6
root@gq:~#
root@cmn:~# ntpq -pn
remote refid st t when poll reach delay offset jitter
==============================================================================
+169.229.70.183 169.229.128.214 3 u 76 1024 377 42.350 0.786 4.726
*199.7.177.206 64.147.116.229 2 u 936 1024 377 23.638 -1.749 1.943
-50.116.45.175 150.233.214.204 3 u 39m 1024 4 80.487 -9.515 0.992
+67.18.187.111 129.7.1.66 2 u 35m 1024 4 23.162 -3.073 0.420
root@cmn:~# less /etc/ntp.conf
root@cmn:~# cat /etc/debian_version
6.0.6
root@cmn:~# cat
root@big:~# chronyc tracking
Reference ID : 204.235.61.9 (name1.glorb.com)
Stratum : 3
Ref time (UTC) : Tue Oct 16 13:02:17 2012
System time : 0.000000403 seconds fast of NTP time
Frequency : 191.966 ppm fast
Residual freq : 0.147 ppm
Skew : 0.350 ppm
Root delay : 0.071643 seconds
Root dispersion : 0.017760 seconds
root@big:~# chronyc sources
210 Number of sources = 4
MS Name/IP address Stratum Poll LastRx Last sample
============================================================================
^* name1.glorb.com 2 10 688 +4900us[+6711us] +/- 63ms
^+ d7.hotfile.com 2 10 938 +10ms[ +12ms] +/- 64ms
^+ lttleman.deekayen.net 2 10 110 +6652us[+6652us] +/- 72ms
^+ vpn.cumquat.nl 2 10 675 +12ms[ +12ms] +/- 109ms
root@big:~# cat /etc/debian_version
6.0.6
root@big:~#
--
Paul E Condon
pecondon@mesanetworks.net
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