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dc.date.accessioned2013-03-12T08:28:51Z
dc.date.available2013-03-12T08:28:51Z
dc.date.issued2007en_US
dc.date.submitted2007-06-19en_US
dc.identifier.citationSharma, Arvind. A DMSP satellite study of magnetospheric plasma convection and particle precipitation states during passage at Earth of interplanetary magnetic clouds monitored by the Wind spacecraft. Masteroppgave, University of Oslo, 2007en_US
dc.identifier.urihttp://hdl.handle.net/10852/11154
dc.description.abstractIn this study we take advantage of the slow, smooth rotation of the strong magnetic fields in interplanetary magnetic clouds to identify transitions between particle precipitation/plasma convection states of the magnetosphere and relate them unambiguously to the interplanetary conditions. Focus is placed on magnetospheric states driven by the passage at Earth of the following three magnetic clouds: August 12-13, 2000; May 20-21, 2005; and June 12-13, 2005. Interplanetary field and plasma data were acquired by the Wind spacecraft. Plasma convection and particle precipitation states are identified from passages of spacecraft DMSP F13 across the northern hemisphere polar regions in approximate dusk–to–dawn orbits. Emphasis is placed on the discriminating between different categories of plasma convection cells and the corresponding particle precipitation and field Aligned current characteristics. Supplementary information on the magnetospheric states is obtained both from magnetic field deflections detected by the same satellite as it traverses systems of field-aligned currents as well as from FUV (Far-UltraViolet) images and convection pattern obtained from spacecraft IMAGE and SuperDARN radar network, respectively . By this technique we are able to establish the correspondence between polar cap convection/- precipitation states and parameters such as the (i) the orientation of the magnetic field in the cloud as parametrized by the clock angle of the magnetic field in the magnetic cloud, (ii) the IMF By and Bx polarities, and (iii) solar wind density/dynamic pressure. The conclusions extend recent work in the area.nor
dc.language.isoengen_US
dc.subjectromfysikk plasmafysikk magnetfelt DMSP skyeren_US
dc.titleA DMSP satellite study of magnetospheric plasma convection and particle precipitation states during passage at Earth of interplanetary magnetic clouds monitored by the Wind spacecraften_US
dc.typeMaster thesisen_US
dc.date.updated2007-09-11en_US
dc.creator.authorSharma, Arvinden_US
dc.subject.nsiVDP::430en_US
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Sharma, Arvind&rft.title=A DMSP satellite study of magnetospheric plasma convection and particle precipitation states during passage at Earth of interplanetary magnetic clouds monitored by the Wind spacecraft&rft.inst=University of Oslo&rft.date=2007&rft.degree=Masteroppgaveen_US
dc.identifier.urnURN:NBN:no-15770en_US
dc.type.documentMasteroppgaveen_US
dc.identifier.duo62668en_US
dc.contributor.supervisorProffesor Per Even Sandholten_US
dc.identifier.bibsys071265899en_US
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/11154/2/sharma_thesis.pdf


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