Arnt Karlsen wrote:

> ..2 factors:  how does these handle planet rotation, and, how accurate
> are these IMU's.

Typical IMU's don't handle planet rotation at all because they never
know _where_ on the planet they are located (you need to handle it
different depending on which half of out earth you are sitting).

Solid-state IMU's are not very accurate. As long as you have external
references, like a camera picture, you are able to keep bank and
attitude and navigate over short distances with a cheap solid-state
IMU. For a flight over a long distance you have to readjust them like
you do with the old, well known gyroscopes because the signal noise is
too much to be used for accurate differentiation,

 Unix _IS_ user friendly - it's just selective about who its friends are !

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