Re: Relativistic synchronisation method

On 12/22/2024 11:58 AM, Paul.B.Andersen wrote:

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".
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Here we go:
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Richard, do you own a watch of some kind?
  'yes' or 'no', please!
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Do you use the internet to set your watch?
(or is your watch a computer on the net?)
  'yes' or 'no', please!
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Do you use a mobile network to set your watch?
(or is your watch a mobile phone?)
  'yes' or 'no', please!
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Do you use GPS to set your watch?
(or is your watch a GPS-receiver?)
  'yes' or 'no', please!
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Do you use public radio or TV to set your  watch?
(or is your watch on a radio receiver or a TV?)
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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

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

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OK. Thanks for a clear answer.
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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.
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That is because you know that just about all clocks in France
are synchronous and show UTC+1 hour.
So do the clocks in most western European countries,
Your clock and my clock are synchronous with UTC+1h.
(My clock within 1 second)
>

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The problem is that you do not understand what you are doing, and what
a synchronization process consists of in our universe.

>

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When you synchronize all the users' watches, you synchronize them on a
single watch, which is the system watch and which is located in a
given place (the position of the watch is as crucial as its relative
speed in the cosmos).

>
Quite.
The single clock is the USNO Master Clock.
Its position in cosmos is Washington, D.C., USA
>
  https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-Naval-Observatory/Precise-Time-Department/The-USNO-Master-Clock/
>
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This watch is an "abstract", virtual watch, which synchronizes all the
watches on it, and on IT ALONE, to give coherence to the whole.

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It is a very real clock, consisting of several atomic clocks.
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Richard, I am in the real world.
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I synchronise my clock to the master clock with this:
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https://time.is/clock
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It uses the internet. The delay both ways in the net is measured
and corrected for, so the displayed  time will be correct
within a second.
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You answered yes to these questions:
Do you use the internet to set your watch?
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)?
>
So you synchronise your clock to UTC+1h in the same way as I do, and you
expect your clock to be synchronous with UTC+1h within a minute or so.
(I expect it to be synchronous within a second.)
>
So don't tell me that you used some "abstract virtual clock"
when you set your clock.
>
How did you read "the abstract virtual clock"? :-D
>

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This means that in fact, all the watches remain out of tune by nature,
and will always remain so,

>
You have said that you use internet to synchronise your clock,
so what does it mean that it still is "out of tune"?
Is your clock a cuckoo clock with a cuckoo who is singing out of tune?
>
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Merry Christmas Richard.
>

There are a lot more corrections to the clock,
the time-of-day, than is given in usual accounts.
"Zulu" time, say.
The "naval" observatory in Colorado,
..., the most land-locked state, ....
Heh, "Washington DC's latitude and longitude"
are known to vary.
Many long-running timekeeping apparatuses
do not agree, yet, clocks only ever slow or meet.
Then, the clock, as with regards to
time-of-day, terrestrial, are two different things.
Lattices of atomic clock lattive arrays
readily demonstrate space-contraction,
because of GR, not SR.
About light falling, or Pound-Rebka,
you'll notice it also falls "up".
Einstein in Einstein's Relativity
has a "the time", a clock hypothesis.
There are no closed time-like curves,
and furthermore never negative time,
as with regards to space contraction
and the differences space-contraction-linear
and space-contraction-rotational, which
may have experimental verification
readily defined.
GPS does operate on a principle of relativity -
it says how the clocks changed because of
presuming dead reckoning and comparing clocks,
figuring it's cheaper to keep the satellite
array synchronized than updating zillions
of ground-based receivers.
It's like "the JPL Ephemeris is constantly
updated according to detected clock changes
reflecting space-time continuum flexing,
it's called Parameterized Post-Newtonian".
Hey, have you heard that "Relativity of
Simultaneity is non-local"? It follows
from "SR is local", which is part of
Einstein's Relativity since Einstein
said so, which most people didn't notice.