[ntp:questions] Google and leap seconds
david at ex.djwhome.demon.invalid
Wed Sep 21 22:08:51 UTC 2011
> On 2011-09-21, David Woolley <david at ex.djwhome.demon.invalid> wrote:
>> Richard B. Gilbert wrote:
>>> It's unfortunate that the earth DOES NOT rotate exactly 360 degrees in
>>> exactly 24.000000000000 hours. This bit of poor design causes all sorts
>> It's nothing like it. It out by approximately 1 degree a day!
> well, not if you define the rotation with respect to the "mean sun"
> rather than the stars. Then it is only out by a few PPB.
It makes a big difference for GPS, though. I believe their orbital
period is half a sidereal day, not 12 hours or even 43200 TAI seconds.
More information about the questions