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Since 14th March 2022, these tools are downloadable via the ConnectByCnes site at this address :

This is the introduction page of the CNES flight dynamic tools developed in the frame of the French Space Operation Act (FSOA, LOS in french).

We can find:

  • an orbital propagator based on a semi analytic integration method of the orbital parameters.
  • a tool allowing to compute the risk to do a victim for launch failure cases or spacecraft reentry.
  • a tool allowing to simulate atmospheric reentry of space debris taking into account aerothermodynamics effects.

Only STELA is directly downloadable. For the other ones, a preliminary demand is needed.