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Scatter plot of the parameter estimations using the BP method in the case of a 2D incompressible flow with the rate of stretching a∗ = 0.1, the shear b∗ = 0.5, the vorticity c∗ = 0.2, and the diffusivity κ∗ = 1. Light (dark) points refer to the case of a number of tracked particles N = 100 (N = 400) and the number of measurements is 50.
