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Re: PPS in GPSD vs Chrony
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From: |
Miroslav Lichvar |
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Subject: |
Re: PPS in GPSD vs Chrony |
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Date: |
Tue, 30 Jun 2020 12:39:03 +0200 |
On Tue, Jun 30, 2020 at 12:49:13AM -0700, Gary E. Miller wrote:
> Miroslav Lichvar <mlichvar@redhat.com> wrote:
>
> > For example, I set the PPS on my ublox units to
> > 32 Hz to get more samples and improve the stability.
>
> Interesting. Do you have data on this configuration compared to
> plain PPS?
No, I can't find any data that would compare a 32Hz PPS to 1Hz PPS
directly. It's been a while since I experimented with it. The jitter
of samples updating the clock should roughly improve with a square
root of the PPS rate.
--
Miroslav Lichvar