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    Re: Short Dip distance
    From: Robin Stuart
    Date: 2018 Mar 16, 07:31 -0700

    What impressive accuracy this dip short calculator that Greg pointed out has achieved! 10-11 arc minutes is roughly the angle subtended by half a millimetre at the distance of the Sun. Maybe it shouldn't be too surprising as Bowditch 2002 and 2017 gives an unnecessarily and misleadingly complicated formula for short dip that involves taking inverse tangents where simple ratios suffice. For more details see the summary that was attached to this post,

    Robin Stuart

       
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