Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11c..01a&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM11C-01
Physics
2431 Ionosphere/Magnetosphere Interactions (2736), 2704 Auroral Phenomena (2407), 2721 Field-Aligned Currents And Current Systems (2409)
Scientific paper
Temporal and spatial ambiguities are difficult to resolve in single point measurements. However, the different travel times of ions and electrons can give information of the time history of a flux tube. We apply this technique to interpret FAST observations from the upward current region of the auroral oval. Assuming the classical quasi-static picture of multiple U-shape potential structures along the same flux tube, these observations indicate that the potential structure at the lowest altitude is the first to be created or the last to disappear. An improved understanding of how the U-shape potential structures develop can gain a better understanding of the dynamical Ionosphere-Magnetosphere interaction.
Andersson L.-L.
Johansson Thoralf
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