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    Re: Aldebaran occultation
    From: Paul Hirose
    Date: 2017 Mar 6, 12:33 -0800

    On 2017-03-05 20:23, Brad Morris wrote:
    > I don't know how sensitive the parallax is in the occultation situation but
    > it occurs to me that this could be an additional source of error.
    
    At .01′ precision, my program shows a variation in separation angle no
    greater than one count in the last digit for a 1′ change in latitude or
    longitude, or 1000 feet in height. (Alex didn't say his height, so I
    guessed 500 feet.)
    
    MICA's delta T is .5 second too great, but after I applied corrections
    the separation angle changed a trivial .01′.
    
    
    On 2017-03-06 6:23, Sean C wrote:
     > Also, I get a SD of the Moon of 16'08.27" at the time of occultation.
    This differs from Paul's figure by -8.13".
    
    I bet you selected geocentric origin in MICA. It's easy to overlook that
    setting. Topocentric SD is what's needed.
    
    

       
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