Locations in the diagram of three sets of sixteen sinusoidal time series with different periods and noise levels. A value of ΔT_sub = 100 d has been used in the calculation of for all time series. Black larger markers connected with a continuous line identify time series with a period of 100 d (i.e., equal to ΔT_sub), while red and blue smaller markers connected with dotted lines identify times series with periods of 200 and 400 d, respectively, as indicated above the lines. Each marker on a line locates a time series with a specific noise level, increasing from σ_noise/A_sine = 0 to 3 from left to right, as indicated below the markers of the P = 100 d time series. The horizontal dashed line is an guideline to and the diagonal dashed line an guideline to .