Leapfrog4Propagator

class ssapy.propagator.Leapfrog4Propagator(accel, h)

Bases: RKPropagator

Fourth-order symplectic leapfrog propagator.

This propagator uses a Yoshida-style composition of second-order leapfrog steps to achieve fourth-order accuracy while preserving the symplectic structure for conservative systems.

Parameters:

• accel (ssapy.Accel) – Accel object containing the acceleration model by which to propagate.

• h (float) – Fixed time step in seconds.

Notes

This method is most appropriate for conservative force models. It can still be used with non-conservative or time-dependent accelerations, but some of the desirable symplectic properties may no longer hold.