On 23/08/2011 19:53, Poutnik wrote:
In articleab1ff57d-444b-40d0-83b2-70c57e1f5af1
@x14g2000prn.googlegroups.com, says...

the fact is that the satellites does not need
relativity corrections, good bye

While being corrected, they do not need correction,
it is obvious.

True enough I suppose. You could do all of the GR & SR corrections in
the GPS receivers but there are a lot more of them and additional
information would have to be broadcast down from each of the satellites.

The Russian GLONASS satellites were deliberately put into much more
circular orbits to minimise some of the GR terms. This is dissected in
various reports by NPL some are now online at Tycho USNO.

http://tycho.usno.navy.mil/ptti/1995/Vol%2027_13.pdf

It could all have been done by iterative empirically fitted engineering
corrections without any understanding of why beyond "that it works" but
scientists would then be looking for the root cause.

Regards,
Martin Brown