Re: Evidences for the ether


"Paul B. Andersen" <paul.b.andersen@xxxxxxxxxxxxxxxx> wrote in message
news:ebvv8a$p7r$1@xxxxxxxxxxxxxxxxxxx
| Sorcerer wrote:
| > "Paul B. Andersen" <paul.b.andersen@xxxxxxxxxxxxxxxx> wrote in message
| > news:ebtaau$itc$1@xxxxxxxxxxxxxxxxxxx
| > | Sorcerer wrote:
| > | > "Paul B. Andersen" <paul.b.andersen@xxxxxxxxxxxxxxxx> wrote in
message
| > | > news:ebslhq$41p$1@xxxxxxxxxxxxxxxxxxx
| > | > | Sorcerer wrote:
| > | > | > "Paul B. Andersen" <paul.b.andersen@xxxxxxxxxxxxxxxx> wrote in
message
| > | > | > news:ebruel$1d0$1@xxxxxxxxxxxxxxxxxxx
| > | > | > | Sorcerer wrote:
| > | > | > | > "Paul B. Andersen" <paul.b.andersen@xxxxxxxxxxxxxxxx> wrote
in message
| > | > | > | > news:ebqkqg$2mo$1@xxxxxxxxxxxxxxxxxxx
| > | > | > | > | Let us take one step at the time.
| > | > | > | > | A GPS satellite emits its time together with data that
make
| > | > | > | > | it possible to know its position when the signal was sent.
| > | > | > | > | A receiver receives this signal.
| > | > | > | > | How can the receiver find its distance from the satellite?
| > | > | > | >
| > | > | > | > Signals are recieved from a minimum of three satellites
which
| > | > | > | > inform the receiver of their position and the time sent.
| > | > | > | > An algorithm in the receiver then computes position based
| > | > | > | > on that data. The exact details of the algorithm are not
crucial
| > | > | > | > to the discussion since it depends on the manufacturer of
the
| > | > | > | > reciever.
| > | > | > |
| > | > | > | Let's stop here for a bit.
| > | > | >
| > | > | > Don't interrupt. Read to the end and then ask questions.
| > | > | > [interruption snipped]
| > | > | >
| > | > | >
| > | > | > | > One would expect to get good altitude information from
| > | > | > | > a satellite directly overhead, but it turns out this is not
the case
| > | > | > | > for a large number of receivers due to the uncertainty of
| > | > | > | > a GPS clock which was damaged (Ghost's term) prior to
| > | > | > | > launch to agree with some idiotic reliance on the foolish
idea
| > | > | > | > that the speed of the signal was to be from A to A in time
t'A-tA,
| > | > | > | > whereas in fact the time of the signal is from A to B in
time tB-tA,A
| > | > | > | > being the satellite and B being the receiver. The direct
distance to the
| > | > | > | > satellite is therefore AB/(tB-tA), tA been sent as part of
the data,
| > | > | > | > the signal is not returned to the satellite with tB being
| > | > | > | > half (t'A-tB) + tA
| > | > | > | > because the satellite is MOVING and it does not want to know
| > | > | > | > where it is because it cannot do anything about it anyway.
| > | > | > | >
| > | > | > | > This foolishness may be found in
| > | > | > | >
| > | > http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img7.gif
| > | > | > | >
| > | > | > | > However, GPS is most useful for sailors where altitude is
not
| > | > | > | > a consideration, and aircraft still rely on barometric and
radar
| > | > | > | > altitude. GPS can be used to navigate on land, but this is
more
| > | > | > | > of a gimmick than a necessity unless you happen to be a
soldier
| > | > | > | > in a wilderness. Cell phones could do a better job in those
regions
| > | > | > | > where gimmicks are considered status symbols, and so my
| > | > | > | > son-in-law (#2) has GPS and a mobile phone, as does my
| > | > | > | > niece's boyfriend. I too have a mobile phone, but for the
simple
| > | > | > | > reason that it is cheaper than renting a land line and not
because it
| > | > | > | > plays ringtones. I seldom use it.
| > | > | > | > I navigate by the sun, stars and (predominantly) road signs,
| > | > | > | > I am always instinctively aware of the direction of North.
| > | > | > | > Altitude I find rather difficult with instrumentation, but I
cannot
| > | > | > | > rely upon GPS for accuracy.
| > | > | > |
| > | > | > [snip interruption]
| > | > | > |
| > | > | > | > | You wouldn't repeat yourself, Androcles, because you never
| > | > | > | > | explained this.
| > | > | > | > | But you do know the answer, don't you?
| > | > | > | >
| > | > | > | > Yes. The details of some of the algorithms I would perhaps
need
| > | > | > | > to check on, I do not recall them in detail, but I'm not
going to
| > | > | > | > because they do not particularly interest me. Were I being
paid
| > | > | > | > as a consultant, I would do so. Are you planning on paying
me as
| > | > | > | > a consultant?
| > | > | > | > I thought not.
| > | > | >
| > | > | > [interruption snipped]
| > | > | >
| > | > | > | > You can, however, award me an honorary degree from Agder
| > | > | > | > for services rendered above and beyond the call of duty, to
go
| > | > | > | > alongside my diploma which you were gracious enough to
award.
| > | > | > | > I have it framed, although it is gathering dust somewhere...
| > | > | > | > probably under my bed. Oh, well...
| > | > | > | > Androcles.
| > | > | > |
| > | > | > | I will award you another diploma when you have
| > | > | > | explained how the GPS works.
| > | > | > | But you will have to deserve it.
| > | > | > | You have explained nothing so far.
| > | > | >
| > | > | > It's not my fault you cannot understand plain English. As I
said,
| > | > | > the last diploma is gathering dust somewhere, the same as your
neuron.
| > | > | > The GPS works by sending data from three or more satellites
| > | > | > to a receiver which then analyzes it. What more do you want
that
| > | > | > is not contained in the text above?
| > | > | >
| > | > | > Androcles
| > | > |
| > | > | I am so sorry I interrupted your verbose lecture.
| > | > | But in your eagerness to tell me about sailors, mobile phones,
| > | > | ring tones and road signs, I am afraid you forgot to explain
| > | > | how the GPS works.
| > | >
| > | > The GPS works by sending data from three or more satellites
| > | > to a receiver which then analyzes it. What more do you want that
| > | > is not contained in the text above?
| > | > Androcles
| > |
| > | I want to know how the receiver computes its position.
| >
| > I've told you, the details of the algorithm varies from manufacturer
| > to manufacturer. ANYONE can analyze data.
|
| Anyone but you?

Even I.

| I didn't ask for the details of the algorithm, I asked for
| the principle, which does not vary but is always the same.

What is so difficult about triangulation? That IS the principle.

Construct a sphere of radius vt where v is the signal velocity
around each satellite and where the three spheres intersect is
where the receiver is. Jeez.
[rest of mindless babble snipped]
Androcles



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