[ntp:questions] Doubt about Syncronization of GPS SPECTRACOM(2)

Richard B. gilbert rgilbert88 at comcast.net
Wed Feb 28 18:46:08 UTC 2007


Marcos Onisto wrote:
> Hello All,
> 
> I'd like to solve my doubt about my GPS (SPECTRACOM(2)). I have one
> GPS that never work.
> I dont know why, but my GPS is working now. Anyway my doubt is about
> the syncronization.
> Now it's syncronized as below, but i cant to consult the GPS. What is wrong?
> 
> # /usr/local/bin/ntpdate -q localhost
> Looking for host localhost and service ntp
> host found : localhost
> server ::1, stratum 0, offset 0.000000, delay 0.00000
> 28 Feb 11:13:44 ntpdate[1074]: no server suitable for synchronization found
> 
> 
> # /usr/local/bin/ntptrace localhost
> localhost: stratum 1, offset -0.000110, root distance 0.000000, refid 'WWVB'
> 
> 
> # /usr/local/bin/ntpq
> ntpq> pe
>      remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *SPECTRACOM(2)   .WWVB.           0 l   44   64  377    0.000   -0.095   0.019
> 

That is not "GPS".   It's a VLF (Very Low Frequency) receiver tuned to 
60 KHz.  WWVB is the VLF broadcast from the National Institute of 
Standards and Technology (NIST) located in Fort Collins, Colorado.

GPS is a satellite based system.  It's an entirely different technology!


> ntpq>
> ntpq> as
> ind assID status  conf reach auth condition  last_event cnt
> ===========================================================
>   1 27956  9624   yes   yes  none  sys.peer   reachable  2
> 
> ntpq>
> ntpq> as
> ind assID status  conf reach auth condition  last_event cnt
> ===========================================================
>   1 27956  9624   yes   yes  none  sys.peer   reachable  2
> 
> ntpq>
> ntpq> rv 27956
> status=9624 reach, conf, sel_sys.peer, 2 events, event_reach,
> srcadr=SPECTRACOM(2), srcport=123, dstadr=127.0.0.1, dstport=123,
> leap=00, stratum=0, precision=-13, rootdelay=0.000,
> rootdispersion=1.000, refid=WWVB, reach=377, unreach=0, hmode=3,
> pmode=4, hpoll=6, ppoll=6, flash=00 ok, keyid=0, ttl=0, offset=-0.095,
> delay=0.000, dispersion=1.048, jitter=0.019,
> reftime=c9900cc2.0046862e  Wed, Feb 28 2007 11:14:26.001,
> org=c9900cc2.0046862e  Wed, Feb 28 2007 11:14:26.001,
> rec=c9900cc3.a75eb068  Wed, Feb 28 2007 11:14:27.653,
> xmt=c9900cf8.a78cb75d  Wed, Feb 28 2007 11:15:20.654,
> filtdelay=     0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00,
> filtoffset=   -0.09   -0.11   -0.11   -0.11   -0.09   -0.13   -0.12   -0.10,
> filtdisp=      0.12    1.08    2.03    3.00    3.98    4.94    5.90    6.84
> 
> ntpq>
> ntpq> q
> #
> 
> If my hardware is syncronized with the SPECTRACOM(2), why i cant consult then?
> Why i receive this message "no server suitable for synchronization found"?
> Can someone helpe me?
> 

In what way are you unable to "consult"?  Nothing you have posted above 
shows any problem other than not knowing what technology you are using.

If an NTP client attempts to synchronize with your server it should have 
no difficulty in doing so if it's properly configured.







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