Re: Circular motion in SR

On Mar 24, 6:05 am, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Mar 24, 7:27 am, rbwinn <rbwi...@xxxxxxxx> wrote:

Except that there is a definite circumfrence to the orbit of the
satellite.

No, that is incorrect. There is a circumference to the orbit of the
satellite that depends on whether that circumference is measured from
earth or whether it is measured from the satellite. Moreover, the
radius of that orbit depends on the reference frame. The radius of the
orbit of Mercury as measured by someone on the surface of Mercury will
differ from the radius as measured by someone on the surface of the
sun by about 2 parts in a billion. For the Moon and the Earth the
difference is about 5 parts per trillion.

Well, it is good to see a scientist make a decision. So now my
question is, does an altimeter in the satellite read different in the
frame of reference of the satellite than it does in the frame of
reference of the earth?

That depends on how the altimeter works.

Now that is where we differ. I say that the altimeter can only have
one reading. It will either agree with the cesium clock in the
satellite, or it will agree with the cesium clock on earth, or it will
not agree with either. It cannot agree with both clocks at the same
time. Haven't scientists ever run any experiments concerning this?
It seems that with all of the satellites in orbit, they should have
some idea.
Robert B. Winn

.

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