Dear THE_ONE:

"THE_ONE" wrote in message
oups.com...
Does the speed of light ONLY partially pass as being
ISOTROPIC and that is all ?
....
The only test I can think of, would be to use two
Atomic clocks spaced far apart on the surface of
the earth. Synchronization of the time readings
on these two clocks is not of importance.
....
Does anyone know of any test of this nature has
yet been performed ?

Why? It is still a TWLS measurement.

The two clocks are some distance apart. Note distance is TWLS
distance, no other kind is possible.

Then add the fact that your "X" only intersects the surface of
the Earth for one of the clocks. We have non-negligible velocity
around the Earth-Moon barycenter, rotationally, around the Sun,
above and below the plane of the Milky Way, around the Milky Way,
within the supercluster and so on. There is no absolute space.

David A. Smith