State transition matrix and mass

Orekit development
6

I’ll merge today this feature.
It’s optional, by default the mass is not included in the STM.

As of now, there is a few limitations:

  • it is not compatible with all native parameter drivers. For example the TriggerDate
  • only Maneuver inheritors are considered. If you have a custom ForceModel modifying mass, it won’t see it because at the moment there is no direct access to the mass equation. To change that we would need to expose some sort of getMassDerivative in ForceModel. I think it could make sense. By default it would return 0