Saturday, October 14, 2006

Warning about the orbit constellation plots

Hmmm, having played a bit more with it, it is clear that WinOrsa does not quite plot artificial earth satellites at the correct geographic subsatellite points.

The relative orbital constellation as such seems reasonably okay though. I think it models only using gravity (its software for modelling solar system object orbits after all) and not drag, hence the satellites get plotted at wrong positions in their orbits .

So be careful with the 3D plots I recently posted. The relative orbit orientations seem okay, but the absolute positions of the satellites not.

Note added 16/10: WinOrsa author Pasquale Tricarico today confirmed me that only gravity is modelled and not (yet) drag. This will hopefully be included in a future release. That would be cool, as the 3D graphic output of the software is great.

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