HR: 0800h
AN: SM21A-0351    [Abstracts]
TI: Combined SuperDARN and Ground-based Magnetometer Determinations of the Ionospheric Hall Conductance
AU: * Murr, D
EM: david.murr@dartmouth.edu
AF: Thayer School of Engineering, Dartmouth College, 8000 Cummings Hall, Hanover, NH 03755 United States
AU: Shepherd, S
EM: simon.shepherd@dartmouth.edu
AF: Thayer School of Engineering, Dartmouth College, 8000 Cummings Hall, Hanover, NH 03755 United States
AB: The global distribution of height-integrated ionospheric conductance plays a vital role in the electrodynamic coupling between the magnetosphere and ionosphere. Despite this importance, values of ionospheric conductance are not readily available, due mostly to the difficulty in measuring it, particularly over widespread regions. Using combined SuperDARN measurements of the ionospheric electric field and magnetometer measurements of the ground magnetic perturbation, it is possible (in restricted cases) to infer the height-integrated Hall conductance in the localized region of the collocated measurements. By using the extended nature of the SuperDARN and magnetometer networks it is possible to make localized inferences of the Hall conductance over a widespread region. Several periods with collocated measurements extending over many hours of local time are analyzed to determine the Hall conductance for varying geomagnetic conditions. These results are compared to those obtained by incoherent scatter radar observations.
DE: 2400 IONOSPHERE (6929)
DE: 2407 Auroral ionosphere (2704)
DE: 2431 Ionosphere/magnetosphere interactions (2736)
DE: 2494 Instruments and techniques
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005