Re: [Ntp] Timescales

[Martin Burnicki <[e-mail]>]

Steve Allen wrote:
> The extended discussion in the NTPWG now is strikingly similar to the
> arguments in the late 1960s which resulted in leap seconds.
> A 1969 report analyzing the options pointed out that leap seconds
> would cause problems in precise timing systems used for navigation.
> Backward compatibility concerns forced the international agreement to
> have leap seconds.  Before the first leap second the technical members
> of the committees proceeded to change their operational systems to use
> purely atomic time with no leaps, and that choice was repeated for
> GPS, Galileo, BeiDou, etc. because it was the only robust way.

True, and I agree, but if you need civil time, corrections and offsets
also have to be provided by these systems.

Of course, the operators of the GNSS systems provide this information
via the satellite signals, but if you operate your own NTP stratum-1
server (or your own PTP grandmaster) you have to find a reliable source
for this kind of information. If this is a leap second file, you have to
make sure the file is always kept up to date.

Martin
-- 
Martin Burnicki

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