Integrator : Différence entre versions

Version du 8 novembre 2019 à 10:14

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
• Type of altitude: geodetic or geocentric one (since V11.4)

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.

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