Run 3 ('4d'-Var)

2 sec of observations (in 5 sec run). Observations are of both angles, but not their speeds.

Graph A: Primary angle of double pendulum vs time

Key:
Green points mark the assimilation cycle boundaries.
Blue is the exact solution.
Red are the observations used.
Magenta is the assimilated solution.

Graph B: Convergence of the primary angle (vs time) for the first assimilation cycle

Graph C: Convergence of the secondary angle (vs time) for the first assimilation cycle

Graph D: Convergence of the rate of change of the primary angle (vs time) for the first assimilation cycle

Graph E: Convergence of the rate of change of the secondary angle (vs time) for the first assimilation cycle

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