Integrator : Différence entre versions

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''<font color=#FF0000>Note: it is possible to retro propagate a trajectory by giving a negative duration or a date previous to the initial one.</font>''
 
''<font color=#FF0000>Note: it is possible to retro propagate a trajectory by giving a negative duration or a date previous to the initial one.</font>''
  
* Frame used for the propagation (only inertial ones among CIRF, EME2000 and GCRF); the first one is recommended in term of CPU time.
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* Frame used for the propagation (only inertial ones among '''CIRF''', '''EME2000''' and '''GCRF'''); the first one is recommended in term of <font color=#FF8C00>CPU</font> time.
  
 
== Numerical integrator ==
 
== Numerical integrator ==
  
 
Then, we will have numerical integrator tuning:
 
Then, we will have numerical integrator tuning:
* If the user chooses a Runge-Kutta, only the step will have to be entered
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* If the user chooses a <font color=#FF8C00>Runge Kutta</font>, 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).
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* If the <font color=#FF8C00>Dormand Price</font> is selected the user will have to tune min/max steps and tolerances (but by default values are available).
 
   
 
   
 
[[Fichier:DOP.png]]
 
[[Fichier:DOP.png]]
  
 
''<font color=#FF0000>Note: in a future version some typical tuning will be proposed depending on the kind of orbit and the desired precision.</font>''
 
''<font color=#FF0000>Note: in a future version some typical tuning will be proposed depending on the kind of orbit and the desired precision.</font>''

Version du 6 juillet 2017 à 16:58

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

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.

  • 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).

DOP.png

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