rktrackrep - GenFit/GenFit GitHub Wiki
To the best understanding, here is what the RKTrackRep is doing when extrapolating:
-
RKPropagate: Do one RK-Step
-
RKutta:
- Do n RK-Step's until target surface
- Do linear extrapolation to target surface
- Project Jacobian to target surface
- Project Noise to target surface
- Calculate
- Extrap: Apply correction with