  The Gravity Probe B (GP-B) satellite experiment will measure the precession
of on-board gyroscopes to extraordinary accuracy. Such precessions are
predicted by General Relativity (GR), and one component of this precession is
the `frame-dragging' or Lense-Thirring effect, which is caused by the rotation
of the earth, and the other is the geodetic effect. A new theory of gravity
predicts, however, a second and much larger `frame-dragging' or vorticity
induced spin precession. This spin precession component will also display the
effects of novel gravitational waves which are predicted by the new theory of
gravity, and which have already been seen in several experiments. The magnitude
and signature of these gravitational wave induced precession effects is given
for comparison with the GP-B experimental data.
