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    Re: Azimuth / elevation from sextant observations
    From: Peter Monta
    Date: 2019 Jul 31, 03:22 -0700
    Hi Paul,

    Elevation angles determined by this method are affected by terrestrial
    refraction. That's not necessarily a bad thing. It might be interesting
    to analyze the variability of terrestrial refraction.

    The surveyors are probably the experts here.  For trigonometric leveling, you have this challenging situation of an air path over some finite distance (not all the way to space).  If you have access to both ends of the link, there is some trick involving reciprocal measurements.

    Cheers,
    Peter

       
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