Field-aligned plasma structures found to provide key signatures of magnetospheric boundaries.
Persistent large-scale Te enhancements causally linked to downward magnetosheath heat flux in the cusp.
Filamentary Te enhancements produced by Alfvenic electron precipitation at the nightside polar cap boundary.
Characteristic energy gradients and auroral ionospheric cavities mark the edge of the nightside polar cap.
Doe, R. A., J. D. Kelly, E. R. Sanchez “Observations of persistent dayside F region electron temperature enhancements associated with soft magnetosheathlike precipitation,” J Geophys Res., Vol. 106, 3615, 2001.
Doe, R. A., J. F. Vickrey,E.J. Weber, H. A. Gallagher and S. B. Mende “Ground-based signatures for the nightside polar cap boundary,” J Geophys Res., Vol. 102, 19989, 1997.
Kagan, L. M., M. C. Kelley, and R. A. Doe “Ionospheric electron heating by structured electric fields: Theory and experiment,” J Geophys Res., Vol. 101, 10893, 1996.