"Jonathan Silverlight" wrote
in message ...
[snip]
But isn't Gravity Probe B nice and snug below the Van Allen belt? You
won't get the same steady acceleration, but it will be very interesting if
there is some unexplained residual in the results.
I could be wrong but ... in principle the gyroscopes are contained within
the spacecraft where they are shielded from virtually all external
influences, including the solar wind, and the spacecraft is manoeuvred about
the gyroscopes.
Grim