Contour lines of the ion VDF observed by PAS, in a quasi-perpendicular magnetic configuration, in the plane identified by the radial direction R and the magnetic field vector (left). Contours have been computed after integration of the VDF along the direction perpendicular to this plane. The arrow indicates the direction of the local magnetic field vector. Right panel shows the same VDF integrated in polar and azimuth angles with the three ion families highlighted in different colors.