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    Re: Graphical method by Favet / de 'Lisle
    From: Lu Abel
    Date: 2011 Apr 29, 07:47 -0700
    Can anyone explain the nomongram shown?   It's supposed be for calculating the azmuth of the star, but the axes are not labeled.

    I mentioned I'm in the middle of teaching a celestial class.   Sights are being reduced using a calculator and the Law of Cosines rather than tabularly.  As I review my students' sight reductions, I've found no mistakes in Hc calculation, but several have made mistakes in azimuth calculation  (more terms in the equation, possibility of negative cosines, ???).   I'd love to be able to pass out copies of this nomogram as a way of helping them check for mistakes.

    Lu


    From: Harri Ojanen <hojanen{at}kolumbus.fi>
    To: NavList@fer3.com
    Sent: Fri, April 29, 2011 2:29:16 AM
    Subject: [NavList] Re: Graphical method by Favet / de 'Lisle

    Hi,

    Regarding nomograms I came across this software:

    http://www.pynomo.org/wiki/index.php?title=Example:Star_navigation

    Looks like it's a general purpose code for producing nomograms, and the page behind the above links has an example for celestial navigation.

    Cheers,
    Harri

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