Correction procedure for the measured dispersion. Each point is a simulated dispersion measurement with a different input value. Error bars show the scatter observed among the 20 realizations. The dashed line shows the one-to-one relation. The plots display two examples of simulated dispersions for the PACS 100 μm band, at z = 0.6 for M_∗ = 3 × 10¹⁰ (left panel), and at z = 1.5 for M_∗ = 2 × 10¹⁰ M_⊙ (right panel). These bins were chosen to illustrate the two regimes of high and low S/N, respectively.