"Ockham" wrote in message
k...

"snapdragon31" wrote in message
...
On Jan 29, 8:54 pm, Randy Poe wrote:
On Jan 29, 8:14 pm, HW@....(Dr. Henri Wilson) wrote:

According to relativists, GPS clocks GAIN 38us per day on the ground
clock.
That is due to two components, 45us for gravity and -7us for relative
speed.

Accordingly, an observer (OO) in GPS orbit would see the GC LOSING 52us
per
day.

After one year, the OO would calculate that the OC was about 19ms ahead
of the
GC.
However, the GO would calculate that his GC was only 13ms behind.

What happens when the clocks are reunited?
Who is right?

Two people drive different routes from city A to
city B. When they are reunited, one odometer reads
220 km and the other reads 230 km. Which one is
right?

- Randy

| According to relativity, both odometer readings are wrong. They do
| not represent the true distance of the routes travelled because of the
| length contraction effect.
| According to Newton's law, both odometer readings are right.

| The GPS clock paradox is a variation of the twin paradox, so no valid
| solution.

The paradox resides in the third postulate.

Androcles .. we've told you .. there is no third postulate

'the "time" required by light to travel from A to B equals
the "time" it requires to travel from B to A' -- Albert Einstein

The time for a signal to get from the satellite to the receiver
does not equal the time for an uplink because the satellite has
moved, obviously.

Indeed .. SR and Einstein agrees with that. Time from A to B for light is
only the same as the time from B to A when A and B both at rest in some
frame of reference (ie they are not moving relative to each other)