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dc.contributor.advisor Hill, Thomas W.
dc.creatorDing, Cheng
dc.date.accessioned 2009-06-04T00:45:00Z
dc.date.available 2009-06-04T00:45:00Z
dc.date.issued 1993
dc.identifier.urihttp://hdl.handle.net/1911/13714
dc.description.abstract Among available quantitative magnetospheric models, the Tsyganenko models represent empirical modeling, while the Toffoletto and Hill model is theoretical analysis. By mapping flux tubes between the ionosphere and the magnetosphere, those two models are analyzed and compared. Both the implied and actual field-aligned currents (FAC) are calculated in both models. The implied FAC, required to maintain the model field in magnetostatic equilibrium and given by the Vasyliunas equation, has the same order of magnitude as observational data, even in non-equilibrium models. The actual FAC, given by Ampere's law, is much smaller than the implied FAC, which means no large extraneous FAC is included in those models. Several new approaches imply that none of these models are in magnetostatic equilibrium, while the discrepancies are considerably larger for the Tsyganenko models. The magnetic effects of a preliminary FAC model have been evaluated in the Toffoletto and Hill theoretical model.
dc.format.extent 75 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectGeophysics
Astronomy
Astrophysics
Plasma physics
dc.title Mapping magnetic flux tubes and field aligned currents using two representative magnetospheric models
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Physics
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science


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