SR/GR use absolute time to synchronize the GPS clocks with the ground clock.
in [Physics]
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From: Michael Moroney on 24 Mar 2010 13:13 "Androcles" <Headmaster(a)Hogwarts.physics_w> writes: >"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message >news:hodajj$i24$1(a)pcls4.std.com... >> Looks like there's some ADD in with your psychosis. If you reread the >> Doppler comparison, you'd notice that there is just one train station. >If you reread the Doppler comparison, you'd notice that there is just one >city. >Someone in San Francisco can't use the same GPS satellite as someone >in New York simultaneously, they have to wait until it adjusts its >frequency! >Good comparison, MORONey. Perhaps GPS satellites only rise, they never >set below the horizon in your world. It appears that you are as thoroughly confused as Seto, thinking I am using the Doppler comparison for the satellites. The Doppler comparison was of a train's audio, just to demonstrate the trivially simple concept of pre-adjusting a frequency for a known effect of physics on a target in relative motion. Yes the Doppler effect most certainly exists in GPS, but the net result is zero, it does not accumulate. The receiver design includes the Doppler effects. As satellites rise, the received freq. is higher, they pass, they recede, the freq. is now lower, the satellite sets, this is a temporary, but not cumulative effect. However, I am discussing the SR/GR effects, that are cumulative and constant. Since the GR (gravity well) effects are about 5 times the SR (motion) effects, let's ignore SR since you confuse it with the Doppler. The earthbound clock will tick slower than a satellite clock due to GR, so an earthbound receiver will see the satellite clock as running fast. So, they simply preset the satellite clock to run just slow enough before launch for the frequency to be correct, as received on earth. Is that too complicated for your senile old brain to comprehend? Now back to your rubber room, you miserable senile old man.
From: Androcles on 24 Mar 2010 14:12 "Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message news:hodh8f$k9r$1(a)pcls4.std.com... > "Androcles" <Headmaster(a)Hogwarts.physics_w> writes: > >>"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message >>news:hodajj$i24$1(a)pcls4.std.com... > >>> Looks like there's some ADD in with your psychosis. If you reread the >>> Doppler comparison, you'd notice that there is just one train station. > >>If you reread the Doppler comparison, you'd notice that there is just one >>city. >>Someone in San Francisco can't use the same GPS satellite as someone >>in New York simultaneously, they have to wait until it adjusts its >>frequency! >>Good comparison, MORONey. Perhaps GPS satellites only rise, they never >>set below the horizon in your world. > > It appears that you are as thoroughly confused as Seto, thinking I am > using the Doppler comparison for the satellites. The Doppler comparison > was of a train's audio, Good comparison, MORONey. If you reread the Doppler comparison, you'd notice that there is just one city. Perhaps GPS satellites only rise, they never set below the horizon in your world. Someone in San Francisco can't use the same GPS satellite as someone in New York simultaneously, they have to wait until it adjusts its frequency! It appears you remain the idiotic fuckwit you always were.
From: Michael Moroney on 24 Mar 2010 17:24 "Androcles" <Headmaster(a)Hogwarts.physics_w> writes: >"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message >news:hodh8f$k9r$1(a)pcls4.std.com... >> >> It appears that you are as thoroughly confused as Seto, thinking I am >> using the Doppler comparison for the satellites. The Doppler comparison >> was of a train's audio, >Good comparison, MORONey. If you reread the Doppler comparison, >you'd notice that there is just one city. If YOU reread the Doppler comparison, you'd notice NO cities were mentioned, just a train, a train platform and a weird composer. Do you agree or disagree that someone on the platform will hear a tone different from that produced by a moving train? Do you agree or disagree that, with known conditions (such as a fixed speed of the train), you can calculate a frequency for the train's horn such that someone on the platform will hear a selected frequency? Now, if you had bothered to read what you snipped unread, you'd learn that the GR corrections (which is most of what the GPS has to account for) is due to the gravity well effect, and would still be necessary even if the GPS satellites were somehow held stationary over the earth, with NO Doppler effect involved whatsoever. Now, who keeps letting you out of your padded room?
From: Androcles on 24 Mar 2010 17:41 "Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message news:hodvuj$kh4$1(a)pcls6.std.com... > "Androcles" <Headmaster(a)Hogwarts.physics_w> writes: > >>"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message >>news:hodh8f$k9r$1(a)pcls4.std.com... >>> >>> It appears that you are as thoroughly confused as Seto, thinking I am >>> using the Doppler comparison for the satellites. The Doppler comparison >>> was of a train's audio, > >>Good comparison, MORONey. If you reread the Doppler comparison, >>you'd notice that there is just one city. > > If YOU reread I did. It appears you remain the idiotic fuckwit you always were. Perhaps GPS satellites only rise, they never set below the horizon in your world. Someone in San Francisco can't use the same GPS satellite as someone in New York simultaneously, they have to wait until it adjusts its frequency!
From: Michael Moroney on 24 Mar 2010 21:51
"Androcles" <Headmaster(a)Hogwarts.physics_w> writes: >"Michael Moroney" <moroney(a)world.std.spaamtrap.com> wrote in message >news:hodvuj$kh4$1(a)pcls6.std.com... >> >>>Good comparison, MORONey. If you reread the Doppler comparison, >>>you'd notice that there is just one city. >> >> If YOU reread >I did. No you didn't. >Perhaps GPS satellites only rise, they never set below the horizon in your >world. Someone in San Francisco can't use the same GPS satellite as >someone in New York simultaneously, they have to wait until it adjusts >its frequency! Nowhere in my train Doppler example did I mention San Francisco, New York City, or rising GPS satellites. There is only a train with a horn, a platform with an audience, an unspecified band and a crazy composer. |