HR: 1340h
AN: SM43A-1133    [Abstracts]
TI: Ionospheric Electric-Field Basis Functions Discontinuous at the Boundary Between Closed and Open Magnetic Field Lines
AU: * Schulz, M
EM: mike@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3-13, Toyokawa, Aichi, 442-8507 Japan
AU: * Schulz, M
EM: mike@stelab.nagoya-u.ac.jp
AF: Lockheed Martin Advanced Technology Center, Dept ADCS, Bldg 255, 3251 Hanover Street, Palo Alto, CA 94304 United States
AB: In some simple models of magnetospheric electrodynamics [e.g., Volland, Ann. Geophys., 31, 154-173, 1975], the normal component of the convection electric field is discontinuous across the boundary between closed and open magnetic field lines. The requisite discontinuity in {\bf E} is achieved by making the scalar potential proportional to a positive power (typically 1 or 2) of L on closed field lines and to a negative power (typically -1/2) of L on open (i.e., polar-cap) field lines. This suggests that it may be advantageous to construct more realistic (and thus more complicated) magnetospheric and ionospheric electric-field models from superpositions of mutually orthogonal (or not) vector basis functions having this same analytical property (i.e., discontinuity at L = L*, the boundary surface between closed and open magnetic field lines). The present work offers a few examples of such constructions.
DE: 2411 Electric fields (2712)
DE: 2494 Instruments and techniques
DE: 2712 Electric fields (2411)
DE: 2760 Plasma convection
DE: 2794 Instruments and techniques
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting