Overview of instrumental resistive anode mapping (a) and normalisations (b to g) applied to the He⁺ data. All plots depict a quantity as a function of pitch angle (x-axis) and magnetic field azimuthal angle (y-axis). All identified He⁺ events are selected for which the conditions 0.9 < ϖ_inj, p < 1.1, π/16 < ϑ_B < π/16 and |λ_ecl − 75|< 32 apply. Panel a depicts the average position channel measured by the PLASTIC resistive anode (average resistive anode channel, av. RA ch.). Panel b depicts He⁺ PHA data as counts per bin. Panel c depicts weights based on the number of instrumental weighting cycles during which the magnetic field angle was observed. These are applied in a first normalisation step. The result is shown in panel d as normalised counts per bin. Panel e depicts weights based on the coverage of a particle gyro orbit within the aperture of PLASTIC. Panels f and g depict the result of normalisation by these weights. The data from the φ < 0° and φ > 0° halves of SWS are separately depicted in panel f and panel g, respectively.