TRICE 2 Observations of Low?Energy Magnetospheric Ions Within the Cusp

On December 08, 2018 the Twin Rocket Investigation of Cusp Electrodynamics 2 (TRICE 2) mission was successfully launched. The consisted two sounding rockets, each carrying a payload capable measuring electron and ion distributions, electric magnetic fields, plasma waves occurring in northern magnetospheric cusp. This study highlights wave observations obtained by TRICE cusp from multiscale (MMS) spacecraft at low-latitude magnetopause hours prior to traversal Within cusp, typical features were observed, that is, energy-latitude dispersion injected magnetosheath plasma. However, lower energy population also measured near equatorward edge on open field lines. Pitch-angle distributions low-energy ions suggest this origin, not ionospheric upflows. Data MMS show counterstreaming present outer magnetosphere boundary layer similar energies those observed Correlations between within broadband extremely low frequency filled flux tube may have undergone wave-particle interactions. These interactions cause pitch-angle scattering closer loss cone, thereby allowing them precipitate into be rockets.