Add option to build orbiter with SPICE Celbodies.#630
Conversation
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I tried with the "Tutorials/DG to the Moon" scenario and the Moon and Earth are not quite at the same position as before, by a long shot (also notice the darker lighting on Earth). |
Can you send me your orbiter.log? I think the kernel I included is too small to cover up to 2010. I need to extend the data (for release we can also package with a larger kernel using github workflows rather than directly committing, like we do for textures) |
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But no, expected difference is meters to maybe a few km over longer periods. Earth-moon radial distance should have accuracy to reality on the order of 10s of centimeters. |
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**** Orbiter.log I don't have the textures on my Debug out so ignore the last warnings |
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There is something fishy. If I add this for out of bound ephemeris access, I get the D3D9Client to assert when trying to locate the closest planet (probably a NaN issue) : If I replace it with : I get a burst of erroneous accesses (only at the beginning) but no assert... Edit : I stand corrected, more popups appear later, probably because it's interpolating inbetween |
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I think what needs to happen in this case:
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With DE442 the moon looks in the right place |
The "orbiter.bsp" I included only covered 1999-2002. That's the problem |
I agree but we should provide a reasonable default (1950 - 2050 maybe?). No idea how much size it would need though... |
600MB, unfortunately |
2 participants
This is based on https://github.com/Ajaja/spice_orbiter
It replaces the VSOP87, ELP82, Galsat, Satsat, and other legacy customer ephemerides modules, with a orbiter-spice module that loads spice kernels. This will allow better scalability and future-proofing (ephemerides can be updated with a new kernel file, without recompiling orbiter).
TODO: