On Sun, Mar 13, 2016 at 11:18 PM, Dennis Tillman <dennis@ridesoft.com> wrote:

I once read a fascinating article on what is done to keep the Cesium Clocks
on the GPS satellites accurate. If I remember correctly there are five
different relativistic effects that have to be compensated for. Frame
dragging is one of the most interesting.

Frame dragging is much too weak to affect the GPS satellites. If you
read about the saga of Gravity Probe B, you'll see how difficult it is
to measure it at all.