HR: 09:15h
AN: SM21C-06    [Abstracts]
TI: Magnetospheric Waveguide Modes: Coupling to Cavity Modes and Responses to Changes in the Global Magnetospheric Configuration
AU: * McWilliams, K A
EM: kathryn.mcwilliams@usask.ca
AF: Dept. of Physics & Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2 Canada
AU: Yeoman, T K
EM: yxo@ion.le.ac.uk
AF: Dept of Physics & Astronomy, University of Leicester, University Road, Leicester, LE1 7RH United Kingdom
AU: Sibeck, D G
EM: david.sibeck@gsfc.nasa.gov
AF: NASA/GSFC, Code 696, Greenbelt, MD 20771 United States
AB: A sequence of observations from a variety of instruments measured a ten-minute wave, along with related harmonics, in the solar wind, at the magnetopause, inside the magnetosphere, and from the ground. The location and temporal ordering of the wave phenomena reveal information about the causal relationships of the wave excitation and the development of harmonics for this interval. Coupling of a waveguide mode to a compressional, or cavity, mode was observed. Global changes in the magnetospheric configuration lead to changes in the frequency response observed at several locations in the magnetosphere and the ionosphere, such that the observed frequencies remained the same, but the dominant harmonics changed.
DE: 2736 Magnetosphere/ionosphere interactions
DE: 2740 Magnetospheric configuration and dynamics
DE: 2752 MHD waves and instabilities
DE: 2760 Plasma convection
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting