Fig. 4

Simulated distributions of deposited particles with direction angles of a α = 10°, b α = 20°, and c α = 30°. Numerical simulations were performed with an ejection speed of v _e = 150 m/s, a rotation angle of γ = 20° from the vertical axis, and a drag coefficient of C _D = 0.8. Each simulation used 3000 particles. Black lines in the map are the boundaries of the zones based on the concentration of impact craters, as reported by Kaneko et al. (2016) in order to compare simulated particle distribution with actual distribution of ballistic impact craters. Zone A is the area inside line 1. Zone B is the area between lines 1 and 2. Zone C is the area between lines 2 and 3. Zone D is the area outside the line 3