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From: Python <python@invalid.org>
Newsgroups: sci.physics.relativity
Subject: Re: Sync two clocks
Date: Tue, 20 Aug 2024 16:03:21 +0200
Organization: CCCP
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Le 20/08/2024 à 16:01, Maciej Wozniak a écrit :
> W dniu 20.08.2024 o 15:08, Paul.B.Andersen pisze:
>> Den 20.08.2024 01:15, skrev Richard Hachel:
>>> It is impossible to synchronize two watches A and B located in 
>>> different places.
>>> It is not a technical problem, it is not a problem of intelligence, 
>>> it is simply that it is as impossible as finding a round square, or a 
>>> natural number between 5 and 6.
>>> Because nature is not made like that.
>>> Anyone who wants to synchronize watches with each other does not 
>>> realize that he is looking for rabbit horns.
>>
>> --------------------
>>
>>> The only thing we can do is to find a kind of abstract, imaginary 
>>> synchronization procedure, called the Einstein procedure where tAB is 
>>> supposed to be equal to tBA not only for the point M which is the 
>>> only real origin of the synchronization, but for everyone.
>>
>> So the only thing we can do is to do what Einstein did,
>> namely to define a synchronisation procedure which
>> makes it possible to synchronise two clocks at different
>> places in an inertial frame of reference.
> 
> That's for sure the only thing [you]
> can do. Professionals of GPS could do more.
> 

Sure ! Thanks to GR. As Paul wrote in another post :

>> Note that clocks showing UTC are synchronous in the non-rotating
>> Earth centred frame of reference (ECI-frame), but they are NOT
>> synchronous in the ground frame.
>> Note the rather peculiar phenomenon that the UTC clocks
>> are synchronous in the frame were they are moving, but
>> not synchronous in the frame where they are stationary. 

BTW. You are posting here because you love to be spanked, aren't you?