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2019

Multi-instrument Observations of Mesoscale Enhancement of Subauroral Polarization Stream Associated With an Injection

Subauroral polarization streams (SAPS) prefer geomagnetically disturbed conditions and strongly correlate with geomagnetic indexes. However, the temporal evolution of SAPS and its relationship with dynamic and structured ring current and particle injection are still not well understood. In this study, we performed detailed analysis of temporal evolution of SAPS during a moderate storm on 18 May 2013 using conjugate observations of SAPS from the Van Allen Probes (VAP) and the Super Dual Auroral Radar Network (SuperDARN). The ...

Wang, Zihan; Zou, Shasha; Shepherd, Simon; Liang, Jun; Gjerloev, Jesper; Ruohoniemi, Michael; Kunduri, Bharat; Wygant, John;

YEAR: 2019     DOI: 10.1029/2019JA026535

Field-Aligned Current; Particle Injection; Sub-auroral Polarization Stream; Van Allen Probes

2018

Energetic electron injections deep into the inner magnetosphere: a result of the subauroral polarization stream (SAPS) potential drop

It has been reported that the dynamics of energetic (tens to hundreds of keV) electrons and ions is inconsistent with the theoretical picture in which the large-scale electric field is a superposition of corotation and convection electric fields. Combining one year of measurements by the Super Dual Auroral Radar Network, DMSP F-18 and the Van Allen Probes, we show that subauroral polarization streams are observed when energetic electrons have penetrated below L = 4. Outside the plasmasphere in the premidnight region, potenti ...

Lejosne, ène; Kunduri, B.; Mozer, F.; Turner, D.;

YEAR: 2018     DOI: 10.1029/2018GL077969

adiabatic invariants; drift paths; electric fields; injections; SAPS; Van Allen Probes



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