[ntp:questions] National time standard differences
Richard B. Gilbert
rgilbert88 at comcast.net
Tue Feb 9 18:28:41 UTC 2010
David J Taylor wrote:
>>> I remember the flying of caesium or other atomic clocks round the
>>> world, and that folks had to invoke relativistic corrections. Were
>>> these better than microseconds as well?
>> Please excuse me if I leave relativistic corrections to the late
>> Professor Einstein! It's not something I've ever needed to know!
> I meant the flying clocks (microseconds). Relativistic corrections are,
> I understand, needed for GPS satellites, though.
They are, indeed! They are small, very small, but utterly necessary if
you're counting your nanoseconds.
I'll settle for getting the seconds right. Nothing I do requires
More information about the questions