Upper row: intensity (top) and anisotropy (bottom)-time profiles for three observers located along an IMF line in a 300 km s⁻¹ Parker solar wind rooted at 0.1 AU at 0° latitude (left panel) and at −3° latitude (right panel). Both panels show the intensity-time profiles for observers at a heliocentric radial distance of 0.3 AU (blue), 1 AU (orange), and 1.5 AU (green), and for protons of 2.70 MeV (dotted curves), 9.25 MeV (dashed) and 31.62 MeV (solid). Lower row: peak-intensities of the simulated proton channels (colour coded) as a function of radial distance for an IMF line at 0° latitude (left panel) and at −3° latitude (right panel).