Re: Relativistic synchronisation method

Paul.B.Andersen <relativity@paulba.no> wrote:
 

Den 22.12.2024 22:15, skrev Richard Hachel:

Le 22/12/2024 à 20:56, "Paul.B.Andersen" a écrit :

Den 22.12.2024 14:35, skrev Richard Hachel:

Le 22/12/2024 à 14:00, "Paul.B.Andersen" a écrit :

>
I want you to answer my simple questions in a way I can understand.
>
I will reformulate my question so you will only have to
answer "YES" or "NO".
>
Here we go:
>
Richard, do you own a watch of some kind?
   'yes' or 'no', please!
>
Do you use the internet to set your watch?
(or is your watch a computer on the net?)
   'yes' or 'no', please!
>
Do you use a mobile network to set your watch?
(or is your watch a mobile phone?)
   'yes' or 'no', please!
>
Do you use GPS to set your watch?
(or is your watch a GPS-receiver?)
   'yes' or 'no', please!
>
Do you use public radio or TV to set your  watch?
(or is your watch on a radio receiver or a TV?)
>
Do you expect your watch to show the same as the clock on
the wall of a railway station or an airport (within a minute or so)?
   'yes' or 'no', please

>

>
Everything you say is true.
>
So I can answer "yes, absolutely" to all your questions.

>

>
OK. Thanks for a clear answer.
>
You expect your watch to be synchronous with the clock on the wall
of a railway station or an airport an airport within a minute or so.
>

>

>
You still don't understand what I'm trying to tell you (it's been four
decades).

>
Yes, your clear answer to my question was easy to understand.
>
My question was:
"Do you expect your watch to show the same as the clock on
   the wall of a railway station or an airport?"
>
Your answer was 'yes'.
>
So you expect the clock on the railway station to be synchronous with
your clock.
>

>
We breathe, we blow.
>
We have a little coffee, and we hold our heads in our hands.
>
WE CANNOT absolutely synchronize two watches with each other, because it
is physically impossible.

>
Right.
There is no such thing as "absolute synchronisation".
It is meaningless because it is no "absolute time".
>
Your clock and my clock and the clock on the railway station
in Paris are synchronous in the non-rotating Earth centred
frame of reference (ECI-frame).

 You keep repeating this mistake.
TAI, hence UTC, is defined as time on the rotating geoid,