Van Allen Probes Observations of Oxygen Ions at the Geospace Plume by Foster, John C, Erickson, Philip J

“…We describe Van Allen Probes observations of ionospheric O+ ions at altitudes of 3–6 R[subscript E] in the near vicinity of the geospace plume in the noon and post-noon sector. The temporal variation of warm ion fluxes observed as a function of time on a moving spacecraft is complicated by changing spacecraft position and complex ion drift paths and velocities that are highly sensitive to ion energy, pitch angle and L value. …”
Get full text

Storm enhanced density: magnetic conjugacy effects by Foster, John C, Rideout, William C

“…The SED streams of cold plasma from lower latitudes enter the polar caps near noon, forming conjugate tongues of ionization over the polar regions. …”
Get full text

Midlatitude TEC enhancements during the October 2003 superstorm by Foster, John C, Rideout, William C

“…A large (∼10x) enhancement in dayside TEC was observed over the US mainland during these events as Dst decreased sharply and strong SAPS electric fields eroded the outer reaches of the post‐noon plasmasphere boundary layer (PBL) forming poleward‐streaming plumes of storm enhanced density. …”
Get full text

Ionospheric longitudinal variations at midlatitudes: Incoherent scatter radar observation at Millstone Hill by Zhang, Shun-Rong, Coster, Anthea J, Holt, John M, Foster, John C, Erickson, Philip J

“…Main findings include: 1) The east-west difference can be up to 60% and varies over the course of the day, being positive (East side Ne > West side Ne) in the late evening, and negative (West side Ne > East side Ne) in the pre-noon. 2) The east-west difference exists throughout the year. …”
Get full text