[ntp:questions] Re: PPS from TrueTime 468-DC GOES Time Receiver (with GPS antenna)

simonpg paul at thesimonet.org
Fri Aug 25 21:03:56 UTC 2006


Thank you for your response!  My comments are interspersed below.

John Ackermann N8UR wrote:
> simonpg wrote:
> > So I have this fine receiver and have been a member of pool.ntp.org for
> > several years.  But I would like to take advantage of the PPS signal.
> > The downside is that I have no idea where to start.  The upside is that
> > I can solder and read a simple schematic diagram.  Any ideas?
>
> GOES was a time service received from a handful of weather satellites;
> while the antenna looks GPS-like, it's not a GPS.  Unfortunately, the
> GOES time service was turned off a while (maybe 18 months?) ago.  While
> there are sporadic reports of people receiving time from the satellites,
> there is no traceability and any results are totally untrustworthy.
>
> So, a neat box has turned into a paperweight...
>

It would have had Truetime not come out with a replacement antenna that
does a GPS to GOES conversion:

ntpq> peer
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
*TRUETIME(0)     .TRUE.           0 l   50   64  377    0.000    2.831
 1.619
-clepsydra.dec.c .GPS.            1 u  158 1024  377   56.722   17.000
 0.222
+clock.xmission. .GPS.            1 u  220 1024  377   79.953   14.986
 0.955
-bigben.cac.wash .USNO.           1 u  210 1024  377   42.859   15.810
 0.323
-time-nw.nist.go .ACTS.           1 u  222 1024  377   36.091   21.114
 1.429
+clock.sjc.he.ne .CDMA.           1 u  161 1024  377   53.454   15.612
 0.382
 LOCAL(0)        .LOCL.          10 l    2   64  377    0.000    0.000
 0.004

So it should still be a neat box.

> John
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