Simulation results in the form of terminator cross-sections for the quasiparallel run. Figure a) (left) is the ionospheric density and b) (right) is the ionospheric velocity. The y and z axes are in units of R_p. A selection of ion trajectories (red) originating in the higher south pole ionosphere and projected on to the terminator plane have been added to a). The same trajectories have been added to Fig. 6f.