Intensity versus tilt-angle profiles for 500 MeV protons at Earth. Top panel: shows these profiles where the value of κ_A, 0 is changed from κ_A, 0 = 1.00f_d(α) (red lines) to κ_A, 0 = 0.75f_d(α) (blue lines) and κ_A, 0 = 0.50f_d(α) (green lines) respectively; for each of these cases, the upper line presents the A >  0 solution, while the lower line represents the A <  0 solution. Bottom panel: shows the corresponding A >  0 to A <  0 ratios.