Re: GPS calculations

From: Paul B. Andersen (paul.b.andersen_at_hia.no)
Date: 09/30/04 

Date: Thu, 30 Sep 2004 10:57:59 +0200

"Henri Wilson" <H@..> skrev i melding news:efeml0hao287f88tgi5pa5o6tikdj3dfrg@4ax.com...
> On Wed, 29 Sep 2004 22:55:55 +0200, "Paul B. Andersen" <paul.b.andersen@hia.no>
> wrote:
>
> >
> >"Henri Wilson" <H@..> skrev i melding news:ktail0p4i6elg54i9qhsrcbhd1markbcs4@4ax.com...
> >> Let's explain in really simple language.
> >>
> >> If an observer in an orbiting space capsule wants to synch the rate of his
> >> clock with that of a ground clock, he can do so by setting the number of
> >> 'ticks' it makes per ONE COMPLETE ORBIT to the number recorded by the ground
> >> clock per ONE COMPLETE ORBIT.
> >>
> >> You see, the two observers have a common clock. They can both agree beforehand
> >> to adjust their own local clocks to tick at a rate, say, of 10^10 per orbit.
> >
> >Exactly right.
> >But since GR is capable of predicting how to adjust the rate of the clock
> >before it is launched, we do not have to adjust the clock in orbit.
> >And - as we know - GR got it exactly right for the GPS satellite clocks.
> >All clocks in the GPS - ground clocks as well as satellite clocks -
> >do indeed tick an equal number of seconds per orbit.
>
> GR got it wrong by at least 20% at that was only through pure coincidence.
> In fact the 'free fall' error has never been properly measured because nobody
> except and SRian actually cares much what it is.

We all know how wrong the GR prediction for the rate
of the GPS satellite clocks has proven to be, don't we? :-)

Paul

Relevant Pages

  • Re: GPS calculations
    ... >> If an observer in an orbiting space capsule wants to synch the rate of his ... >> clock with that of a ground clock, he can do so by setting the number of ... >> clock per ONE COMPLETE ORBIT. ... >> to adjust their own local clocks to tick at a rate, say, of 10^10 per orbit. ...
    (sci.physics.relativity)
  • Re: GPS calculations
    ... > If an observer in an orbiting space capsule wants to synch the rate of his ... > clock with that of a ground clock, he can do so by setting the number of ... > clock per ONE COMPLETE ORBIT. ... But since GR is capable of predicting how to adjust the rate of the clock ...
    (sci.physics.relativity)
  • Re: The Single Experiment that Destroys Einstein.
    ... Both the OO and the ground observer count the number of ticks the ... GC (ground clock) emits PER ORBIT OF THE OO. ...
    (sci.physics.relativity)
  • Re: The Single Experiment that Destroys Einstein.
    ... Ghost, the orbit period defines one discreet absolute time interval. ... problem is that the clock is different. ... BOTH OBSERVERS RECORD IT GOING AT THE SAME RATE ...BOTH BEFORE AND AFTER ...
    (sci.physics.relativity)
  • Re: Basics series proposed
    ... Just as Cassini disappears behind and ... > from Saturn, the signal will pass through the planet's atmosphere, ... > entire orbit. ... They would need to argue that either the craft clock ...
    (sci.physics)