[LEAPSECS] My FOSDEM slides

Tony Finch dot at dotat.at
Tue Mar 3 19:04:10 EST 2015


Martin Burnicki <martin.burnicki at meinberg.de> wrote:
>
> I agree, but as I've tried to point out above I think a better project design
> would have been to use TAI instead of GPS time. PTP works natively with TAI,
> and you can easily convert between he two scales.

I don't understand this paragraph. The three timescales you mention have
totally different formats:

TAI: YYYY-MM-DD T HH:MM:SS
PTP: SSSSSSSSSS
GPS: WWWW SSSSSS

They have different epochs:

TAI: 1958-01-01 T 00:00:00 Z
PTP: 1970-01-01 T 00:00:00 Z
GPS: 1980-01-06 T 00:00:00 Z

So I don't see how it makes sense to argue that PTP is more like TAI than
GPS time.

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Irish Sea: West 6 to gale 8, decreasing 4. Moderate or rough. Showers. Good.


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