Robustness of the analysis for determining the most likely aerosol extinction curve. The standard analysis (Run B, black), which includes all observations except ρ = 7°, with the yellow region giving the 2σ confidence interval, is plotted. Over-plotted are the same procedures but including ρ = 7° (orange), excluding ρ = 13° (green), excluding the NIR arm (blue), and excluding ρ = 90 and 110°.