Fig. 2. Orbit of the Arase satellite and schematic representation of ion drift motion.
The trajectory of Arase is shown in the LM and magnetic local time (MLT) plane. The highlighted segments with thick curves represent the three duskside passes (Orbits 1 to 3) during which ion composition and extremely high energy electrons were analyzed (Figs. 3 to 5 and figs. S2 to S5). The schematic representation of ion drift paths illustrates the westward motion of ions dominated by terrestrial-origin ions, which were injected from the nightside plasma sheet.