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

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dc.contributor.advisorHill, Thomas W.en_US
dc.creatorDing, Chengen_US
dc.date.accessioned2009-06-04T00:45:00Zen_US
dc.date.available2009-06-04T00:45:00Zen_US
dc.date.issued1993en_US
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.en_US
dc.format.extent75 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS SP. SCI. 1993 DINGen_US
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>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/13714en_US
dc.language.isoengen_US
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.en_US
dc.subjectGeophysicsen_US
dc.subjectAstronomyen_US
dc.subjectAstrophysicsen_US
dc.subjectPlasma physicsen_US
dc.titleMapping magnetic flux tubes and field aligned currents using two representative magnetospheric modelsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentSpace Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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