Mapping magnetic flux tubes and field aligned currents using two representative magnetospheric models

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dc.contributor.advisorHill, Thomas W.
dc.creatorDing, Cheng
dc.date.accessioned2009-06-04T00:45:00Z
dc.date.available2009-06-04T00:45:00Z
dc.date.issued1993
dc.description.abstractAmong 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.extent75 p.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.callnoTHESIS SP. SCI. 1993 DING
dc.identifier.citationDing, Cheng. "Mapping magnetic flux tubes and field aligned currents using two representative magnetospheric models." (1993) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/13714">https://hdl.handle.net/1911/13714</a>.
dc.identifier.urihttps://hdl.handle.net/1911/13714
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectGeophysics
dc.subjectAstronomy
dc.subjectAstrophysics
dc.subjectPlasma physics
dc.titleMapping magnetic flux tubes and field aligned currents using two representative magnetospheric models
dc.typeThesis
dc.type.materialText
thesis.degree.departmentSpace Science
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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