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    Re: Moon's 4SD
    From: Alexandre Eremenko
    Date: 2006 Nov 3, 01:26 -0500

    
    Bill,
    
    > Vertical sun IE checks
    > even with the sun over 60d
    > elevation do not match horizontal IE checks.  4SD
    > for vertical IE checks will be slightly over,
    
    I suppose this is due to sextant non-rigidity.
    Revently I found this addressed in Hezzanith
    manual.
    
    > The problem is in my eyes.
    
    It could be a problem with your eyes,
    but not the problem you describe.
    That an eye is "distorting spheres" is irrelevant.
    
    It is relevant whether the eye sees when exactly two
    objects touch.
    But it could be that it is relevant for the eye
    whether the touching line is vertical or horizontal
    at the touching point.
    
    Did you try to incline your head 90 degrees to one side?
    If your eye is responsible for the phenomenon,
    the phenomenon should disappear then:-)
    
    Alex.
    
    
    
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