That makes a lot of sense and certainly is simpler! Thanks for the
explanation.

Sean

On Fri, 25 Jul 2003, stanton54 wrote:

> Sean Breheny wrote:
> > My understanding is that horizon sensors simply look for some
> > line where the IR (or maybe even visible light) radiation changes
> > abruptly and consider this as the horizon. I could be wrong on this one,
> > though, too.
> The ones like the FMA Co-Pilot are even simpler. For each axis there
> are two sensors pointed in opposite directions. It just looks to see
> which is picking up more light; if they are the same it's level.
>
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