SPICE (NAIF/JPL/NASA) https://naif.jpl.nasa.gov/ https://naif.jpl.nasa.gov/naif/SPICE_aware_Tools_List.pdf
https://github.com/AndrewAnnex/SpiceyPy https://aerith7.hatenablog.com/entry/2017/12/23/181101 https://qiita.com/eriksoon/items/5c638d43afa9c2c5b380