Integrator

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Révision de 10 novembre 2017 à 14:48 par Admin (discussion | contributions) (Propagation data)

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In this tab we have to kind of information:

Propagation data

First, data linked to the propagation with:

  • Duration or date criteria for the end of the propagation
  • Value of the duration or the date of the end of the propagation
  • Altitude of the end of the propagation

PropagationData.png

Note: the propagation will stop once the first event (date or altitude) will occur.

Note: it is possible to retro propagate a trajectory by giving a negative duration or a date previous to the initial one (nevertheless, see here for a known bug).

  • Frame used for the propagation (only inertial ones among CIRF, EME2000 and GCRF); the first one is recommended in term of CPU time.

Numerical integrator

Then, we will have numerical integrator tuning:

  • If the user chooses a Runge Kutta, only the step will have to be entered
  • If the Dormand Price is selected the user will have to tune min/max steps and tolerances (but by default values are available).

Note: be careful, the RK6 is not yet operationnal and may give some erroneous outputs.

DOP.png

Note: in a future version some typical tuning will be proposed depending on the kind of orbit and the desired precision.