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John,
> I just got a quote from KVH yesterday for their new 6DOF FOG IMU system --
> $25,000 and 10-12 weeks delivery. It looks like we will be sticking with
> the Crossbow FOG for a while, although I am keeping my eyes out for either
> a good integrated GPS / IMU that could reduce GPS position jumps, or a set
> of gyros accurate enough to gyrocompass.
You might want to check with some of the "low-cost ELV" companies. I know
that at least Microcosm and Aeroastro have both developed fairly low-cost
IMU/GPS guidance packages that are supposedly good enough to fly an ELV all
the way to orbit. In at least Microcosm's case, I know that they supposedly
cost less than $30k. That's a heck of a lot for ameteurs, but might be
within
your reach if it really is as good as they were making it sound. At least,
it's worth taking a look. They may be willing to finagle down a bit.
~Jon