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Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments

dc.contributor.authorBarthelemy, M.
dc.contributor.authorLilensten, J.
dc.contributor.authorPitout, F.
dc.contributor.authorWedlund, C.S.
dc.contributor.authorThissen, R.
dc.contributor.authorLorentzen, D.
dc.contributor.authorSigernes, F.
dc.contributor.authorMoen, J.
dc.contributor.authorGronoff, G.
dc.contributor.authorMcCrea, I.
dc.contributor.authorRothkael, H.
dc.contributor.authorMenager, H.
dc.contributor.authorAruliah, A.
dc.date2011
dc.date.accessioned2016-03-29T12:43:50Z
dc.date.available2016-03-29T12:43:50Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3059
dc.descriptionThe polarisation of the atomic oxygen red line in the Earth's thermosphere is observed in different configurations with respect to the magnetic field line at high latitude during several coordinated Incoherent Scatter radar/optical experiment campaigns. When pointing northward with a line-of-sight nearly perpendicular to the magnetic field, we show that, as expected, the polarisation is due to precipitated electrons with characteristic energies of a few hundreds of electron Volts. When pointing toward the zenith or southward with a line-of-sight more parallel to the magnetic field, we show that the polarisation practically disappears. This confirms experimentally the predictions deduced from the recent discovery of the red line polarisation. We show that the polarisation direction is parallel to the magnetic field line during geomagnetic activity intensification and that these results are in agreement with theoretical work.
dc.languageeng
dc.titlePolarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeairglow
dc.subject.freeaurora
dc.subject.freegeomagnetic field
dc.subject.freemagnetic field
dc.subject.freepolarization
dc.subject.freesatellite data
dc.subject.freetheoretical study
dc.subject.freethermosphere
dc.source.titleAnnales Geophysicae
dc.source.volume29
dc.source.issue6
dc.source.page1101-1112
Orfeo.peerreviewedYes
dc.identifier.doi10.5194/angeo-29-1101-2011
dc.identifier.scopus2-s2.0-79959754091


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