[time-nuts] 15 Seconds error...??
michael.cook at sfr.fr
Fri Jan 20 04:08:40 EST 2012
Le 20/01/2012 09:37, Attila Kinali a écrit :
> On Thu, 19 Jan 2012 10:02:56 +0100
> mike cook<michael.cook at sfr.fr> wrote:
>> Hmmmm (from a time serf). Some labs provide UTC(k) but do not generate
>> a TA(k) , maybe as there not enough clocks available. Some UTC(k)
>> providers have only one clock,.
> This somehow doesn't make sense. Given you have a clock that generates
> UTC(k). How can you not also generate TAI(k) at the same time?
> (modulo leap seconds of course)
I was just restating data from the BIPM annual report. It would not be
possible to generate TAI as it a cooperative effort, but a good stab at
TA could be made.
> > From a technical point of view, if I had to run a clock that generates
> UTC(k), i would let it run as TAI(k) and apply an offset to derive
> UTC(k) from it. And i would have thought that this is the way how the
> UTC(k) references are generated. Or am i missing something important?
For the labs cited in the report; the implication is that, the sites
are using GPS time transfer to discipline a local Cs reference with UTC
. As TAI is not available to them, they could reconstruct a local TA(k)
from the thus disciplined UTC(k) I guess, but it is not indicated in the
> Attila Kinali
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