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Re: Strange ntpmon offset

From: Gary E. Miller
Subject: Re: Strange ntpmon offset
Date: Mon, 29 Nov 2021 12:26:48 -0800

Yo Massimiliano!

On Mon, 29 Nov 2021 20:37:01 +0100
Massimiliano Fago <> wrote:

> gpsd: 3.22 (revision 3.22)

Almost 2 years old.  3.23.1 is current.

> ntpmon ntpsec-1.2.0+ 2021-04-20T14:25:51Z (git rev 1feb8f90d)

Better, but 1.2.1 is current.

> my gps is u-blox and I have an external antenna. MAX-M8Q-0

Good enough for timekeeping.

> my ntp.conf file is:
> refclock shm unit 1 minpoll 4 maxpoll 4 refid PPS flag4 1 prefer
> # GPS Serial data reference (NTP0)
> #server minpoll 4 maxpoll 4
> #fudge time1 0.9999 refid GPS
> refclock shm unit 0 time1 -0.0900 refid GPS flag4 1 noselect

Where are the other chimers?  ntpd will not work with just 1 chimers.
You ntp.conf is missing the pool statement.

> My problem is that I have strange value on offset data.

Dunno why you think that is strange.  Your ntpd is not locked, so it not
driving your local clock, so the offset will vary randomly with temperature

> Please give me some suggestion.


Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin

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