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Detailed Reference Information |
Stauning, P., Primdahl, F., Watermann, J. and Rasmussen, O. (2001). IMF By-related cusp currents observed from the Ørsted satellite and from ground. Geophysical Research Letters 28: doi: 10.1029/2000GL012010. issn: 0094-8276. |
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¿rsted is the first satellite to conduct highprecision magnetometer observations from low-altitude noon-midnight orbits passing through the polar cusp regions. Field-aligned currents (FAC) derived from ¿rsted magnetic field measurements have been combined with ionospheric current patterns inferred from ground-based magnetic observations to define the structure and location of cusp currents and their dependencies on interplanetary magnetic field (IMF) conditions. Example cases illustrate the close relation between IMF By-related FAC and horizontal ionospheric currents in the cusp region. Our statistical analysis defines for the noon region the variations in FAC latitude with IMF BZ. Comparisons with the statistical cusp location indicate that the more equatorward region of IMF By-related FAC is located on field lines closing at the dayside, while the more poleward FAC are on open field lines. High-energy electron measurements from the satellite confirm this result. ¿ 2001 American Geophysical Union |
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Abstract |
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Keywords
Magnetospheric Physics, Magnetosphere/ionosphere interactions, Magnetospheric Physics, Solar wind/magnetosphere interactions |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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