SR/GR use absolute time to synchronize the GPS clocks with the ground clock.
in [Physics]
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From: kenseto on 23 Mar 2010 09:57 On Mar 22, 6:37 pm, xxein <xx...(a)comcast.net> wrote: > On Mar 19, 10:26 am, kenseto <kens...(a)erinet.com> wrote: > > > > > > > SR/GR use absolute time to synchronize the GPS clocks with the ground > > clock as follows: > > 1. A standard clock second is defined to have 9,192,631,770 periods of > > Cs 133 radiation or N periods of Cs 133 radiation. > > 2. Before a GPS clock is launched into orbit its clock second is > > redefined to have (N +4.15) periods of Cs 133 radiation. This means > > that while in orbit a GPS second is defined to have (N+4.15) periods > > of Cs 133 radiation. > > 3. The reason for the redefinition of the GPS second is to make (N > > +4.15) periods of Cs 133 radiation at the GPS orbiting location to > > contain the same amount of absolute time as N periods of Cs 133 > > radiation on the ground clock. > > 4. The redefined GPS second makes the GPS clock in synch with the > > ground clock continuously. The only daily adjustment is to correct the > > daily drifts. > > > Ken Seto > > xxein: Ever hear of time dilation? NOT the same as Doppler shift. > When you figure this out you will understand something more of gravity > and motion within it. But I doubt it. Hey idiot time dilation got nothing to do with this discussion. - Hide quoted text - > > - Show quoted text -
From: eric gisse on 23 Mar 2010 11:12 kenseto wrote: [...] > Hey idiot the rate of a clock moving wrt you is at 1/gamma at all > times. At what point will you finally give up?
From: Michael Moroney on 23 Mar 2010 12:51 kenseto <kenseto(a)erinet.com> writes: >Hey idiot time dilation got nothing to do with this discussion. Time dilation has *everything* to do with this discussion. Time dilation would cause the GPS satellite to "transmit" at the wrong frequency (as far as a terrestial receiver is concerned), so they adjusted the frequency before launch so it would at the correct frequency on Earth.
From: Michael Moroney on 23 Mar 2010 12:57 kenseto <kenseto(a)erinet.com> writes: >Let me expain to you once again: In SR the rate of a clock moving wrt >you is 1/gamma at all time. The GPS clock sends sends a signal to the >ground clock after the passage of N+4.15 periods of Cs 133 >radiation....when the ground clock receives this signal it will know >that the passage of N periods of Cs 133 radiation on its clock have >taken place. Yes, just like the train horn. The approaching train has to sound at a frequency lower than 440 Hz to be heard at the station as 440 Hz, while a departing train has to sound at a higher frequency to be heard as 440 Hz. Same effect, different causes.
From: Androcles on 23 Mar 2010 14:02
"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message news:hoarit$alc$1(a)pcls6.std.com... > kenseto <kenseto(a)erinet.com> writes: > >>Hey idiot time dilation got nothing to do with this discussion. > > Time dilation has *everything* to do with this discussion. Time dilation > would cause the GPS satellite to "transmit" at the wrong frequency (as > far as a terrestial receiver is concerned), so they adjusted the frequency > before launch so it would at the correct frequency on Earth. Bullshitting fuckwit! |