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    Re: OpenCPN Celestial Navigation Plugin
    From: Andrés Ruiz
    Date: 2025 Mar 5, 22:53 +0100
    Dear Rick,

    The approach of the “celestial_navigation_pi” plugging is somehow weird, useful for teaching concepts or doing an error analysis, but not for practical celestial navigation. At least in the usual way of practicing it.
    I have dedicated some time to see the C++ source code in celestial_navigation_pi-master.zip
    First of all, it is a bit chaotic and not very modular, so maintenance is difficult.
    Basically it uses the calculation of the ephemerides based on a SIMPLIFIED SOLUTION described in Jean Meeus: VSOP87 for planets, ELP2000 for Moon position solution.

    My conclusion is that it is more expensive to modify the code than to start over to achieve the required accuracy.

    ---
    I said that I usually use OpenCPN, not the celestial_navigation_pi plugging.
    ---
    Best regards.
    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/
       
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