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From: Dono <sa_ge@comcast.net>
Newsgroups: alt.math,japan.sci.math,sci.math,sci.physics,sci.physics.relativity
Subject: Re: GPS question
Date: Mon, 23 Feb 2009 15:16:08 -0800 (PST)
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On Feb 23, 2:57=A0pm, koobee.wub...@gmail.com wrote:
> On Feb 23, 1:39 pm, Dave wrote:
>
> > On Feb 23, 1:57 pm, koobee.wub...@gmail.com wrote:
> > > There are two ways to synchronize t1, t2, t3, and t4. =A0Ground-
> > > satellite synchronization introduces much more errors than satellite-
> > > satellite synchronization. =A0The latter does not have the ionosphere
> > > and other atmospheric anomalies to consider. =A0That latter also does
> > > not have high speed to worry about since all satellites are either at
> > > rest or moving very slowly relative to each other.
>
> > Of course the last sentence above is complete nonsense. The satellites
> > lie in six orbital planes, with orbital inclinations of approximately
> > 55 degrees. The planes are separated by 60 degrees right ascension of
> > the ascending node. The four satellites in each plane are nearly at
> > rest with each other, but the relative velocity of two satellites in
> > different planes can be as high as sqrt(3) times the orbital velocity
> > of the satellites, i.e., up to approximately 6.7 km/sec.
>
> Hmmm... =A0I guess Dave never passed the first year physics course.
> <shrug>
>
> You want to try again?
>
> Hint: =A0All satellites have the same angular frequency and the same
> altitude.
>


Umm, no, arsehole : http://en.wikipedia.org/wiki/Global_Positioning_System#=
Space_segment