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    Re: False horizon under the Moon, under the Sun too?
    From: Gary LaPook
    Date: 2020 Apr 21, 13:55 -0700

    I've taken some pretty accurate sights of stars in the middle of the night with the horizon visible due to moon light. 

    "In addition to the normal shots, I also took a series of shots in the middle of the night with the horizon illuminated by moonlight. On November 3, 2009 at 18° 39' north, 40° 36' west between 0024 Z and 0039 Z I shot Fomalhaut, Deneb and Vega three times each. The intercepts were 0.3T; 0.3A; 1.3T; 1.5A; 1.5T; 1.6A; 2.5A; 2.6T; and 3.8A making the σ 2.08 for these 9 shots taken in the middle of the night! Have others tried this?"

    See: 

    http://fer3.com/arc/m2.aspx/Accuracy-sextant-observations-sea-LaPook-sep-2010-g14008

    gl

       
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