Dr. Henri Wilson skrev:
On Sun, 02 Mar 2008 22:25:26 +0100, "Paul B. Andersen"
wrote:
But you have finally accepted that no correction
of the rate of the clocks are made after launch.
Whether or not the synching of the secondary clock is carried out on board is
irrelevant.
Preferably it would be..... but the clock reading can easily be software
corrected at the receiver, using its own signal that includes the accumulated
drift.
Quite.
The "accumulated drift" is the "clock offset". It is not a rate.
The clock reading is indeed software corrected in the receiver,
using the "clock offset".
You are learning. :-)
Good to see that you have given up insisting that the rate of the clocks
are corrected after launch.
So we can consider this claim of yours:
"Of course the bloody rate is changed after launch."
dead and retracted.
So we can sum it up:
1. Prior to launch, the clocks are adjusted by -4.4647E-10 as predicted by GR.
that is done simply to appease the relativists. Nobody is game enough to argue
.........for the same reason that muslims don't criticise mahommed.
(You are free to call this adjustment with a precision equivalent to
14 significant digits "the approximate free fall adjustment" if you like.
A silly name, of course, but the name doesn't change the reality.)
2. No individual correction of the rate of the SV-clocks is made after launch.
3. Actual measurements of the rate of clocks in orbit show that the errors
in the rate is as can be expected by the precision of the clocks,
which is less than 1% of the GR-correction.
1, 2 and 3 are simple facts.
I see that you don't try to refute them.
A wise decision. :-)
The inevitable conclusion is:
The GR-prediction of the rate of clocks in GPS-orbit is proven to
be correct within the precision of the clocks.
Never proven..... and nobody gives a stuff anyway...
Considering that you are not refuting the premises 1, 2 and 3,
it is rather stupid to refute the inevitable conclusion.
the principle requirement is that all orbiting clocks are in synch with each
other.
Indeed.
Case closed.
--
Paul
http://home.c2i.net/pb_andersen/