C_i (top panel), C_e (central panel) and C_α (bottom panel). In each plot we show two curves for comparison, corresponding to (solid line) and (dot-dashed line). It can be noted that increasing the slope parameter allows us to compensate for the reduction of signal at large i (≈10%) and e (≈5%) while minimizing the amplitude of the modulation of the signal at large α for C_α. A residual modulation of C_α with the phase angle is still present for , possibly because regions with intrinsically different albedo have been observed at different phase angles or because of a deviation of the regolith SPPF behavior from the adopted Henyey-Greenstein formulation. Smaller residuals (<3%) can also be noted for C_i and C_e.