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Re: FreeBSD Garmin 18x LVC receiver - precision -20
From: |
Gary E. Miller |
Subject: |
Re: FreeBSD Garmin 18x LVC receiver - precision -20 |
Date: |
Fri, 16 Oct 2020 10:29:07 -0700 |
Yo Philippe!
On Fri, 16 Oct 2020 12:11:51 +0200
"Philippe Maechler" <pmaechler-ml@glattnet.ch> wrote:
> I'm running my own ntp server and will now install a gps receiver to
> let my server be more accurate
Cool.
> gpsd:INFO: KPPS:/dev/cuau0 kernel PPS will be used
KPPS installed. Good.
> gpsd:INFO: PPS:/dev/cuau0 Assert hooks called clock:
> 1602842711.000178108 real: 1602842711.000000000: accepted
KPPS working. Good.
> My interpretation is, that the receiver is connected to 9 satellites
> but still does not get an accurate time ("precision":-20)
You realize that "precision" is a constant? All PPS time is "-20".
It tells you nothing. You want to look at the ntpd jitter. Or better
yet, install and run ntpviz.
> All in all my ntp server does not get time data from PPS (?). ntpq
> tells me, that its not reachable. But I'll get to this when I'm sure
> that gpsd is working
You did not share important info:
What does ntpshmmon tell you?
What is your ntp.conf
> Any help or insight are appreciated
Did you read the time howtos?
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem@rellim.com 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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