I wrote:
> Interestingly enough, for the Apollo LM, they used a similar trick but
> much more extreme...
> The fix was a new set of non-orthogonal (!) axes...
Afterthought: for anyone interested in the details (and with access to a
good library), there was a major paper on the LM autopilot in the January
1971 Journal of Spacecraft and Rockets.
Henry Spencer
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