See the Simpson, Storz and Malys contributions at 
http://futureofutc.org/preprints/

"Several years to update" is not a plan.
--

On Jan 9, 2012, at 11:12 PM, Warner Losh wrote:

> 
> On Jan 9, 2012, at 10:41 PM, Rob Seaman wrote:
>> And yet many arguments here have proceeded from the observation that 
>> civilians rely on complex modern infrastructure.  For instance, a lot of 
>> telecommunications depends on satellite technology, hence the sponsorship of 
>> the Future of UTC meeting by the American Astronautical Society and the 
>> American Institute of Aeronautics and Astronautics.  Modern technology 
>> depends on both kinds of timekeeping.  A conceptual model recognizing the 
>> distinction is necessary.
> 
> And those applications can use UTC without any corrections to track 
> satellites?  It is my understanding tracking satellites in low earth orbit 
> requires millisecond level accuracy of DUT1, so these folks are already 
> correcting the time scale that's provided to them by some amount.  While 
> convenient to keep this value < 1s, they would have several years to update 
> if the change happens...
> 
> Satellites in geostationary orbit don't require anything to track: aim the 
> dish and forget and watch as much TV as you want or are willing to pay for... 
>  So not everything involving satellites would change.
> 
> Warner

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