Further analysis of the optimal DTW path. (a) Comparison of modelled solar wind velocities at Earth (grey) with in situ data (black) and DTW optimised path (red). (b) Alignment of the modelled and in situ data along the optimised DTW path with respect to time. (c) Difference in time between observation and modelled data of aligned points along optimal DTW path (ΔT_{(insitu−model)}). (d) Velocity difference between observation and modelled data of aligned points along optimal DTW path (ΔV_{(insitu−model)}).