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python_precision_problem
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Author SHA1 Message Date
Don Cross
ec35f21827 Starting body rotation axis calculation. 
I'm starting to implement formulas from the IAU 2015 report:
https://astropedia.astrogeology.usgs.gov/download/Docs/WGCCRE/WGCCRE2015reprint.pdf

This is a work in progress. The unit test is partially finished.
The C function Astronomy_RotationAxis() works only for the Sun and Mercury.
I want to also return a rotation matrix that reports the rotating
frame in a way more suited to graphics work. I will add this to
the type astro_axis_t later.
 2021-11-28 20:44:57 -05:00
Don Cross
f0be3be9a0 Document and data files for planet rotation axes. 
I am starting to work on calculation of the north pole
axes of various solar system bodies. Here I include a reference
source document, along with some test data, all described by
the README.md file.
 2021-11-26 20:24:19 -05:00