Re: Where is ahaha.... ahahahanson?

Tom Potter wrote:
"Phineas T Puddleduck" <phineaspuddleduck@xxxxxxxxxxxxxxxxxxxxx> wrote in message news:100620062010417271%phineaspuddleduck@xxxxxxxxxxxxxxxxxxxxxxxx

www.eftaylor.com has a good analysis on the use of relativity in GR.


Here is what eftaylor.com says:
====================+
"The satellite clock will "run fast" by something like 50 000 nanoseconds
per day compared with the clock on Earth's surface due to position effects
alone. CLEARY general relativity is needed for correct operation of the
Global Positioning Satellite System!!!!!!"



Here is the source http://www.eftaylor.com/pub/projecta.pdf and
the actual paragraph Potter is quoting from...


"The satellite clock will "run fast" by something like 50 000
nanoseconds per day compared with the clock on Earth's surface due to
position effects alone. Clearly general relativity is needed for
correct operation of the Global Positioning Satellite System! On the
other hand, the fractional difference between clock rates at the two
locations (at least the fraction due to difference in radius) is
small".

"In addition to effects of position, we must include effects due to
motion of satellite and Earth observer. In which direction will these
effects influence the result? The satellite clock moves faster than
the clock revolving with Earth's surface. But special relativity
tells us that (in an imprecise summary) "moving clocks run slow."
This prediction agrees with the negative sign of v2 in equations [2]
and [3]. Therefore we expect the effect of motion to reduce the
amount by which the satellite clock runs fast compared to the Earth
clock. In brief, when velocity effects are taken into account, we
expect the satellite clock to run faster than the Earth clock by less
than the estimated 50 000 nanoseconds per day. We will need to check
our final result against this prediction".
.

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