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Le 23/07/2024 à 22:04, "Paul.B.Andersen" a écrit :See Richard explain how GPS works!Den 22.07.2024 23:55, skrev Richard Hachel:Damn Paul!Den 22.07.2024 21:37, skrev Paul.B.Andersen:No comment to this, Richard?>
All the clocks in the the GPS system (satellite clocks,ground clocks)
are synchronous with the UTC (Coordinated Universal Time)
to within ~1 ns.
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Your clock on your table is synchronous with the UTC+2 hours,
to within the precision you have set the clock.
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The UTC is universal in the sense that it covers the whole Earth
and the space in its vicinity.
It is coordinated in the sense that it is defined at any point
on the Earth and in the space in Earth's vicinity.
It is real even if it is defined by man. It is no illusion.
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All clocks on Earth and in the GPS-, GLONASS- and Galileo-satellites
are synchronous to the UTC or UTC+n hours.
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It is a fact that you can synchronise clocks via the GPS.
The GPS receiver determines four entities, the time, altitude,
latitude and longitude. If the spatial position is within 1 m,
the time must be the UTC to within ~2 ns.
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Yes,your GPS receiver does indeed determine the time to within few ns
of the UTC, it must do that to determine the position to few metres.
It is obviously no point in displaying the time with this precision
on the screen.
Are you insisting that the GPS doesn't work because the satellite clocks
can't be synchronous because of the nature of space an time?
I say exactly the opposite.
I say that if GPS works, it is PRECISELY thanks to universal anisochrony.So since the clocks in the GPS are impossible to synchronise,
This is what GPS measures, and it is thanks to this that, converting anisochrony into spatial metrics, they can practically give the position to the nearest meter.
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You know of course that all clocks in the same time zone
are synchronous. In France and Norway clocks are currently
showing GMT + 2 hour, so my clock and your clock are actually
synchronous.
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Please explain why our clocks are NOT synchronous.
(To within few seconds)>
But I keep explaining it to you.
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This is a property of space that can be called universal anisochrony.
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This does not translate into the idea that the “plan of present time” so dear to physicists does not exist, it is a thought that seems logical to them, but it is an abstract thought.
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I interpret this to mean that watches in Norway and France are
not synchronous even if they both show GMT+2h
I notice that in your examples, you talk about airports or planes. It's absurd. It is clear that the laws of relativity do not apply at such low speeds, where Vr=Vo and Tr=To.We are talking about synchronisation of clocks. Not relativity.
Relativity only exists if we go very far, or if we go very quickly, and not in the common world.
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