[time-nuts] GPS/UTC time

Mike Cook michael.cook at sfr.fr
Sun Jul 5 13:13:31 EDT 2015


> Le 5 juil. 2015 à 14:38, Jim Lux <jimlux at earthlink.net> a écrit :
> 
> On 7/4/15 10:25 PM, Brian Inglis wrote:
> 
>> Thanks for the good and interesting refs.
>> One of the interesting points was that normal variations are multiples
>> of those caused by earthquakes, and annual variations are up to 1ms and 1m.
>> Another was that the jet streams produce large short term variations
>> caused by temperature differences.
>> Will this always turn up as an issue with all oscillators? ;^>
>> 
> There's a fair amount of noise (some looks periodic) in that plot from USNO of day length
> 
> So, what *is* the ADEV of the earth's rotation?

 Check out tvb’s great presentation at FOSDEM15 and elsewhere. http://leapsecond.com/FOSDEM15/tvb-2015-Precise-Time-Hacking.pdf>
  He has it at 10^-8-10^-9.   

> 
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