Path: news.ccsf.jp!tomockey.ddo.jp!border1.nntp.dca.giganews.com!nntp.giganews.com!postnews.google.com!17g2000vbf.googlegroups.com!not-for-mail
From: torso <sgwtywy@count.com>
Newsgroups: alt.math,japan.sci.math,sci.math,sci.physics,sci.physics.relativity
Subject: Re: GPS question
Date: Mon, 23 Feb 2009 14:57:51 -0800 (PST)
Organization: http://groups.google.com
Lines: 66
Message-ID: <d207c356-4503-49bb-9fc2-f4150a23a9ec@17g2000vbf.googlegroups.com>
References: <W8mdncNGOMKrPgPUnZ2dnUVZ_hSWnZ2d@earthlink.com> 
	<1faf92f1-847e-41c9-b6eb-09556cdeb0bc@t3g2000yqa.googlegroups.com> 
	<c1d8b4f1-c9a6-4801-bd52-339ca6564ad4@i38g2000yqd.googlegroups.com> 
	<824ce95c-e7fb-493c-be79-cc04b6e89fac@q9g2000yqc.googlegroups.com>
NNTP-Posting-Host: 221.231.114.12
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1235429873 7639 127.0.0.1 (23 Feb 2009 22:57:53 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Mon, 23 Feb 2009 22:57:53 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: 17g2000vbf.googlegroups.com; posting-host=221.231.114.12; 
	posting-account=N_ZA7ggAAAATAHG6vNLOlXBrB3DZcZ_h
User-Agent: G2/1.0
X-HTTP-Via: 1.0 YXM-2
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.20) 
	Gecko/20081217 Firefox/2.0.0.20 (.NET CLR 3.5.30729),gzip(gfe),gzip(gfe)
Xref: news.ccsf.jp japan.sci.math:189

On Feb 23, 11:54 pm, koobee.wub...@gmail.com wrote:
> On Feb 23, 12:33 pm, Cephalobus_alie...@comcast.net wrote:
>
>
>
> > On Feb 23, 12:49 pm, koobee.wub...@gmail.com wrote:
> > > You need four satellites where each satellite should know its time an=
d
> > > position.  Time can just be a counter with all the satellites
> > > synchronized to within a count of each other.  Each satellite then
> > > just broadcast its time and position information as almanac signal to
> > > whoever wants to receive it.
>
> > > Since the distance is traveled by light with a known speed, you can
> > > then easily form a set of four equations with four unknowns.  The fou=
r
> > > unknowns are your time (relative to the counter in each satellite) an=
d
> > > position.
>
> > > **  c^2 (t1 =96 t)^2 =3D (x1 =96 x)^2 + (y1 =96 y)^2 + (z1 =96 z)^2
> > > **  c^2 (t2 =96 t)^2 =3D (x2 =96 x)^2 + (y2 =96 y)^2 + (z2 =96 z)^2
> > > **  c^2 (t3 =96 t)^2 =3D (x3 =96 x)^2 + (y3 =96 y)^2 + (z3 =96 z)^2
> > > **  c^2 (t4 =96 t)^2 =3D (x4 =96 x)^2 + (y4 =96 y)^2 + (z4 =96 z)^2
>
> > > Where
>
> > > **  (t1, x1, y1, z1) =3D Time and position of satellite 1
> > > **  (t2, x2, y2, z2) =3D Time and position of satellite 2
> > > **  (t3, x3, y3, z3) =3D Time and position of satellite 3
> > > **  (t4, x4, y4, z4) =3D Time and position of satellite 4
> > > **  (t, x, y, z) =3D Time and position of the receiver
>
> > > Notice that relativistic effect is never needed.
>
> > [...]
>
> > Satellite control requires that the Space Segment and Ground
> > Segment clocks be synchronized. The only practical way of
> > synchronizing the world-wide network of ground stations is to
> > use the network of GPS satellites to disseminate time. The only
> > way to use the networks of GPS satellites to disseminate time is
> > if the satellite clocks are adjusted via the GR correction so
> > that they beat in time with Earth clocks.
>
> These are what the mysticism the Einstein Dingleberries hypnotized
> themselves in **believing in**.  <shrug>
>
> When given the truth, the Einstein Dingleberries still whining about
> their mysticisms fed to them daily.  Oh, well.  Mysticism is only a
> small part to the BS diet fed to Einstein Dingleberries where:
>
> **       FAITH IS THEORY
> **   MYSTICISM IS WISDOM
> **   IGNORANCE IS KNOWLEDGE
> **  PLAGIARISM IS CREATIVITY
> **  CONJECTURE IS REALITY
> **   BELIEVING IS LEARNING
> **       LYING IS TEACHING
>
> <shrug>

in principle you are right

but they still need to add the missing ticks, nobody knows were they
are stored !!!saisc