Hello Frank,
Just passing this along - even though I don't expect you to read it
any time soon!
A discussion of gravimagnetism and the Pioneer Anomaly is again
located at the end of:
http://mtaonline.net/~hheffner/FullGravimag.pdf
It is proposed that the Lorentz force from the ambient gravimagnetic
field of the galaxy is the primary underlying cause for the Pioneer
Anomaly.
A new approach was used - the Pioneer 10 and 11 data was used to
calculate the magnitude of the ambient galactic gravimagnetic field.
It all seems a bit unlikely, but the pieces of the puzzle do come
together pretty well.
Horace