Variation of the Second Split dust step with the step location (position in τ_V − n grid) for the Tripp standardization. Results from global measurements are shown on the left, while those from local measurements are shown on the right. The top panel shows the significance of the step in σ, the middle panel shows the magnitude of the step and the lower panel shows ΔRMS. This last quantity is defined as the difference between the RMS_single obtained for a single population mean description and the RMS_dual obtained for a dual population mean description with a step.