On Feb 23, 1:57 pm, koobee.wub...@gmail.com wrote:
> There are two ways to synchronize t1, t2, t3, and t4.  Ground-
> satellite synchronization introduces much more errors than satellite-
> satellite synchronization.  The latter does not have the ionosphere
> and other atmospheric anomalies to consider.  That latter also does
> not have high speed to worry about since all satellites are either at
> rest or moving very slowly relative to each other.

Of course the last sentence above is complete nonsense. The satellites
lie in six orbital planes, with orbital inclinations of approximately
55 degrees. The planes are separated by 60 degrees right ascension of
the ascending node. The four satellites in each plane are nearly at
rest with each other, but the relative velocity of two satellites in
different planes can be as high as sqrt(3) times the orbital velocity
of the satellites, i.e., up to approximately 6.7 km/sec.

Dave