A note for you horologists in the U.S
Beginning in about a month (approx. July 14), the electric power
industry will stop making "Time Error Corrections" on the U.S. power
grid. For those timekeeping devices that rely on 60 Hz power as their
frequency reference, based on past experienc
In message <9b2c1f26-fb26-4478-b39f-deb38b63e...@batten.eu.org>, Ian Batten wri
tes:
>
>On 17 Jun 2011, at 18:19, Steve Allen wrote:
>>
>> The CCTF realizes that some misunderstanding exists regarding
>> the scope of application of the various time scales. It
>> stresses that TAI i
Ian Batten said:
> That paper claims that GPS time follows UTC (USNO) "modulo one second". I'm
> trying to think of any meaning of the word "modulo", be it from discrete
> mathematics, HAKMEM or anywhere else, with which that makes sense. Can
> anyone hazard a guess at the meaning that is int
On 2011 Jun 18, at 09:45, Ian Batten wrote:
> That paper claims that GPS time follows UTC (USNO) "modulo one second". I'm
> trying to think of any meaning of the word "modulo", be it from discrete
> mathematics, HAKMEM or anywhere else, with which that makes sense. Can
> anyone hazard a guess
On 17 Jun 2011, at 18:19, Steve Allen wrote:
>
> The CCTF realizes that some misunderstanding exists regarding
> the scope of application of the various time scales. It
> stresses that TAI is the uniform time scale underlying UTC,
> and that it should not be considered as
On 2011 Jun 18, at 09:31, Tom Van Baak wrote:
> Are the details about UT1 correct in this link?
> http://hpiers.obspm.fr/iers/bul/bulb/explanatory.html
>
> I ask because a number of posters claim UT1 is a measure of
> earth angle. At one level this is true, of course, but if I read that
> document
This hasn't even been fully correct during the times when UT1 was
observed with zenith telescopes (before about 1980). It is incorrect
today -- all the seven parameters of Earth orientation are of course
determined together, and UT0 is no longer needed nor used by anybody.
Are the de
Many thanks to Steve Allen who informed us on 2011-06-17 about
three revealing documents:
http://www.bipm.org/cc/CCTF/Allowed/18/CCTF_09-38_CGPM-ITU-resp.pdf
http://www.bipm.org/cc/CCTF/Allowed/18/CCTF_09-37_UTC_possible_redefinition.pdf
http://www.bipm.org/cc/CCTF/Allowed/18/CCTF_09-2
