| Re: [chrony-dev] [PATCH] Add support for the UT1 time scale |
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- To: chrony-dev@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-dev] [PATCH] Add support for the UT1 time scale
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Thu, 7 Mar 2024 16:46:37 +0100
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On Wed, Mar 06, 2024 at 01:59:32PM +0300, Filipp Zapolskikh wrote:
> NTP servers running in the UT1 time scale are known (https://
> www.nist.gov/pml/time-and-frequency-division/time-services/
> ut1-ntp-time-dissemination). However, to access them, one needs to
> register in NIST and obtain an account, their software is unknown and
> is not open source, i.e. use is difficult, and deployment of new UT1
> NTP servers is impossible. I suggest filling this gap and trying to
> implement UT1 support in the open source project - chrony.
This probably wouldn't be a widely used feature. Are there any other
devices known to be using UT1 over NTP? NTPv5 should bring official
support for other timescales, but I wasn't planning to support UT1.
I'd prefer to reuse/share functionality with other use cases. I
already had a plan to add an offset command to chronyc to modify the
offset option of existing sources. This is now in git.
With that I think you can write a script that will periodically modify
the offset of all sources to follow the dUT1, i.e. keep the system
clock synchronized to UT1.
--
Miroslav Lichvar
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