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From: "Paul B. Andersen" <some...@somewhere.no>
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Subject: Re: Einstein - Greatest Human to have ever existed.
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On 04.10.2012 07:38, Koobee Wublee wrote:
> On Oct 1, 11:09 pm, Jud Pewther <jpewt...@aol.com> wrote:
>> I've noticed that Paul B.
>> Andersen does have a very good grasp of it, and spends a lot of time
>> with the hopeless task of trying to correct the nitwits.
>
> That very small professor from the Trondheim University in Norway whom
> you hailed as a defender of the religion known as Special and General
> Relativity does not even understand the simple Galilean transform.  It
> is so evident in his JAVA applet about lack of the twins’ paradox in
> which he played mathematical tricks on the parties involved in a
> transform.  With you being very rusty, naturally, you are bedazzled by
> small professor andersen’s mathemagics.  <shrug>

The mathemagics:
http://www.gethome.no/paulba/twins.html

>
> Oh, the very small professor once told me that why time dilation
> needed to be corrected in a GPS receiver is because of the Doppler
> shift in the downlink carrier frequency.

:-)

Koobee Wublee has repeated over and over that he thinks
the reason for the GR correction is that the frequencies
received by the receiver should be correct.

Here is what I once told him:
(Actually I have told him a number of times, to no avail,
  as this posting of his demonstrates.)

http://tinyurl.com/czglxnb
 From where I quote:
  | Koobee Wublee wrote:
  |> Let's see.  The P-code chipping rate on board the satellite is
  |> programmed to 10.22999999543MHz.  The receiver just has to assume a
  |> chipping rate of 10.23MHz ever with accuracy so much compromised to
  |> lower the cost down to bare-bone.  Both the P-code chipping rate on
  |> board the satellite and the P-code chipping rate in the receiver do
  |> not have to be adjusted ever.  So, how does this 38uSec per day come
  |> in?  Do you not realize a 38uSec per day is very much different from
  |> -4,4647E-10 (no units)?
  |>I also would like to leave a homework assignment for you, our twisted
  |> professor from Norway, on how the difference in 10.22999999543MHz
  |> versus 10.23000000000MHz of P-code chipping rate would affect the
  |> accuracy of GPS acquisition.
  |
  | Paul B. Andersen responded:
  | The difference in the chipping rate is of course of no consequence,
  | the Doppler shift at the receiver is vastly greater than this anyway.
  | From whence did you get the idiotic idea that anybody would claim
  | this small change in the chipping rate to be of any consequence?
  | It is completely beside the point!
  |
  |_The reason why this shift has to be done is because of the SV clock!_
  |
  | Only one frequency standard is used at any time in the satellites.
  | (there are three standards, the best of them is at any time used)
  | This one frequency standard is used for _everything_ in
  | the satellite, including the clock.
  |
  | The SV clock ticks out one second every 10230000 cycles from
  | this standard. (a frequency synthesizer is obviously used).
  |
  | Now the correction is delta_f/f = -4.4647E-10, that means
  | that the corrected frequency f' = (1 - 4.4647E-10)*f
  | (1 - 4.4647E-10)*10.23000000000MHz = 10.22999999543MHz
  |
  | So what about the 38us?
  | There are 86400 seconds in a day.
  | 86400*4.4647E-10 sec = 385750.08E-10 sec = 38.575008E-6 ~= 38 us
  |
  | Got it?
  |
  |---------------------------------------------------------------------
  | The important point is that if the SV clock rates were not corrected,
  | they would drift out of sync from GPS time after few minutes.
  | The clocks have to be in sync within 100 ns for the GPS to work.
  |---------------------------------------------------------------------
  |
  | Koobee Wublee wrote:
  |> Speaking of the gravitational time dilation as predicted by GR, Mr.
  |> Dual-Space's hypothesis championed by some John Polak-something, and
  |> others, how would this relativistic effect affect the tuning of the
  |> carrier frequencies, L1 (1.57542GHz) and L2 (1.2276GHz)?  The answer
  |> is none.  You need to understand how engineers work.  <shrug>
  |
  | Paul B. Andersen responded:
  | This is completely beside the point.
  |
  | Anybody with the slightest knowledge of radio engineering will
  | understand that the carrier frequencies received by the receivers
  | are Doppler shifted order of magnitudes more than the minute
  | GR correction.
  | The satellites are moving!
  | So what?
  | Why did you think that this should be of any consequence?
  | The bandwidths of the channels are 20.46 MHz, so the GR-correction
  | and the much bigger Doppler shifts are small compared to
  | the bandwidth.
  |
  | The only way GR comes into the GPS is in the correction of
  | the frequency standard, which is necessary to keep the SV clocks
  | in sync with GPS-time within 100 ns during each time the clock
  | can be corrected from the ground (once a day).
  |
  | BOTTOM LINE:
  |  Without the GR-correction, the clocks would drift out of
  |  sync by 38us - hundreds of times more than can be tolerated -
  |  between each time the clocks are corrected from the ground.
  |
  | Got it?
  | It shouldn't be hard to get unless you are a complete moron.
  |
  | And the receivers don't have to worry about the GR-correction!
  | They can safely assume that the time reported by the satellite
  | is correct. (Which it is - because of the GR-correction.)


> On site, the mathemaGician
> was caught red-handedly.  In the academics, he can get away with it.
> However, in the industry, there is no room for mathemaGics and
> fraudulence.  He was once working in one of these ubiquitous wireless
> (IEEE802.15.4 or blue tooth) startups in Norway.  Now, he is in the
> academics producing piles of bullshit.  Go figure.  <shrug>

Still sore, Koobee? :-)

I can understand why.
I have caught quite a few of your many blunders, and I love it
when you give me an opportunity to remind you of them.
So please do.

Maybe a new round on stellar aberration? :-)

-- 
Paul

http://www.gethome.no/paulba/