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    Re: 3 sights SR example
    From: Andrés Ruiz
    Date: 2017 Jul 4, 08:43 +0200
    Yes Greg,

    the error is D = (Ea2-Ea1)/(2*SIN((Z2-Z1)/2)), where Ea is the random error of each LoP.

    so when Z2-Z1 = 180º the bisector is optimal, "bisectriz de altura óptima", that is, the error is minimum.


    Best regards,

    2017-07-03 21:08 GMT+02:00 Greg Rudzinski <NoReply_Rudzinski@fer3.com>:

    Andrés,

    It is possible to discover systematic error on a two body fix. This is done by taking a back sight on one of the bodies observed (needs an Hs above 60°). The difference in moa between the plotted parallel LOP divided by 2 will be the systematic error which can then be applied to the second observed body (of any Hs) to get an improved two body fix. 

    Greg Rudzinski




    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/
       
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