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    Re: Thoughts on Celestial.
    From: David Fleming
    Date: 2012 Oct 29, 08:56 -0700

    I need to make a minor correction my last post.

    The intersection the cocked hat's angle bisectors is the fix for azimuths greater than 180d case but it is not the centroid of the triangle.

    Further I note that random errors can be reduced by averaging multiple readings if the measurement precision is greater ( more finely divided) than the random error deviation.

    This leaves systematic errors. For systematic errors common, ie the same in all measurements, by the inclusion of more independent measurements ( ie three or more sights ) than required for a fix we are able to measure that error and eliminate it from our fix.
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