Would you believe that the "Aided INS" in the B-1 is just accelerometers?
It is "aided" in that present position updates were input into the system to
"adjust" the computed velocities based on a Kalman filter process. Of course
the Aided INS has changed since I retired with the advent of GPS into the
aircraft. But still the Aided INS driven by accelerometers and update able
by radar fixes still exists for that time that you have lost GPS lock.

BT

"brianDG303" wrote in message
...
Anyone got a clue as to how the pictorial T&B works? I don't see how
they can get good data with just accelerometers.