The plasma environment inside geostationary orbit: A Van Allen Probes HOPE survey.

The two full precessions in local time completed by the Van Allen Probes enable global specification of the near-equatorial inner magnetosphere plasma environment. Observations by the Helium-Oxygen-Proton-Electron (HOPE) mass spectrometers provide detailed insight into the global spatial distribution of electrons, H, He, and O. Near-equatorial omnidirectional fluxes and abundance ratios at energies 0.