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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: OpenCPN Celestial Navigation Plugin
From: Andrés Ruiz
Date: 2025 Mar 5, 22:53 +0100
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.
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.
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I said that I usually use OpenCPN, not the celestial_navigation_pi plugging.
-- I said that I usually use OpenCPN, not the celestial_navigation_pi plugging.
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Best regards.
