Re: Space-time interval (2)

Le 14/08/2024 à 15:24, Richard "Hachel" Lengrand a écrit :

Le 14/08/2024 à 15:08, Python a écrit :

>
Clocks are physical devices (except in Wozniak's mind). They are not
synchronized by imaginary devices on imaginary spatial dimensions.
>
They are built in order to have the same rate (inside an acceptable
narrow interval) to begin with, then drifted according to what
General Relativity predict in order to stay in synch in ECI
frame (despite what demented Wozniak pretends).
>
These are engineering tasks, not the stupid mythomaniac fantasies of
a histrionic senile country doctor.

 But you're mixing everything up.
 That's not what I'm talking about, I'm talking about the initial synchronization.

#metoo

At some point you have to synchronize all the watches in all the capitals with each other.

This is what I was talking about, either for GPS or airports.

However, this is by nature impossible.

Nevertheless it is actually done.

The notion of universal anisochrony means that each watch will lag behind the other with an anisochrony Et=x/c, a reciprocal phenomenon that will affect all the watches in the universe.

You are using a bogus definition of synchronization. Look at
Poincaré and Einstein for a correct one.

So, to start the watches at t=0, you'll need a point in the universe placed at an equal distance from all the others, and only an abstract point placed in an imaginary, perpendicular dimension, at an equal distance from all the points in the local universe will be able to do this.
It's not hard to understand.

It make very little sense. Anyway nothing of that kind is involved
in GPS setup.
You've never look at how GPS is actually designed and operates, have
you?

Now you are talking about something else, that is to say the second particularity which is no longer anisochrony, but the relativity of the internal chronotropy of watches, in the sense that time passes less quickly at the level of the satellite than at the level of a terrestrial clock,

"times passes less/more quickly" is quite a meaning less expression.

and that the chronotropic shift must be regularly reestablished.

"chronotropy" is meaningless.
Moreover after launch there very little daily correction to account
for orbits irregularities and Earth gravitational field not being
perfectly spherically symmetric. Several orders of magnitude compared
to the initial drift predicted by GR.