RMSE between the time lag acquired from the simulations and their linear fit. The points are color-coded according to the time lag window length; 100 (magenta), 200 (red), 300 (green), and 400 (blue) r_g/c. The color-dashed lines denote the mean slopes of the best-fitting (RMSE < 5) time lags for the vertical lines, while the horizontal lines denote the mean RMSE of the entire population. The grey dashed line, with standard deviation area, corresponds to the linear fit to the VLA-only data from BR15, which is A = 42 ± 14 cm min⁻¹. The contours denote the 25%, 50%, and 75% levels of the normalized kernel density estimations for each of the window length results (in the corresponding colors).