Diffusion coefficients in the halo in units of κ₀ = 10²⁵ m²/s, derived for 10 GeV protons using data from the N4631 run. Top: parallel diffusion κ_||/κ₀. Middle: perpendicular diffusion κ_⊥/κ₀. Bottom: anisotropy ratio κ_⊥/κ_||according to Eq. (31). Note that the color scale in the middle and bottom panels have been truncated at their upper ends to allow for more fine structure to be visible above the disk.