Single scattering F and P_s of our ammonia (NH₃) ice cloud particles and the polar haze particles as functions of the planetary phase angle α at three different wavelengths. The curves for the NH₃ ice particles are: black, solid line (λ = 0.55  μm), red, dotted line (0.75 μm), green, dashed-dotted line (0.95 μm). The curves for the polar haze particles are: grey, dashed-triple-dotted line (0.55 μm), orange, long-dashed line (0.75 μm), magenta, dashed line (0.95 μm). The blue, dashed lines are the Rayleigh scattering curves at 0.55 μm.