- Excellent statistics for He+ pickup ions (~50 counts / Estep / hour), although no reliable absolute efficiencies yet.
- Reasonable agreement of the pickup He+ spectra shapes with a pickup ion distribution based on Vasyliunas & Siscoe (1976) and a hot model for the neutral interstellar He in the heliosphere.
- When the IMF turns radial, the pickup flux density in the antisunward direction is systematically decreased close to the cut-off energy as a result of incomplete pitch angle scattering . The effect stows a clear trend with the IMF angle.
- The cut-off in the pickup He+ distribution is found to depend not only on the solar wind speed, but also on the neutral He inflow. Measuring the variation of the cut-off as a function of ecliptic longitude will provide a tool to study the neutral inflow velocity distribution.