Yo Hans! On Wed, 21 Jan 2026 15:32:47 +0100 Hans Mayer <[email protected]> wrote:
> But only on SHM(0) and not PPS(0) as we can see here.
My memory is not that good. Where is your SHM(0) coming from?
> And as SHM(0) is not used as time source but PPS(0) it has also no
> effect on PPS(0) for the stability of the server.
Now you have an NTP question. What is your ntp config??
Without your config, and matching ntpmon, I have no idea what is
happening.
Beyond that your bad NTRIP is causing bad things.
> This is the reference to another stratum 1 server also GPS
> disciplined.
"reference" ???
I'm lost here.
> >> Is there a way to avoid this and make the SHM interface stable
> >> inclusive ntrip ?
> > Did you consider that unstable may actually be better?
> >
> > "jitter" and "offset" are two aspeects of the same thing. Higher
> > "jitter" means lower "offset", and vice versa.
>
> I do not agree completely.
Easy to see. Just vary your "poll". And wait and watch. As poll gets
shorter, the "jitter" goes up, and "offset' goes down. For the simple
reason that that faster poll does not allow the "offset" to build up,
but by adjusting more oftine, the "jitter" goes up.
> > Measureing the "stability" of your PPS using your crappy PC clock is
> > like measuring distance in smoots.
>
> Why do you think it's so crappy ?
All PC clocks are crappy. Let ntpd run, but do not have it adject the
clock, and watch the fun as your PC clocks swings wildly.
> > Perhaps try to use an RTCM source with pseudorange corrections,
> > instead of carrier phase reference data. Probably RTCM2 vs RTCM3.
>
> Currently I don't have access to RTCM2. This caster euref-ip.net has
> only RTCM3 sources.
Your do not want RTCM2. It is very old. Useless today.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
[email protected] Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can't measure it, you can't improve it." - Lord Kelvin
pgp1oyX09BhIX.pgp
Description: OpenPGP digital signature
