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Comparison of TWINS and THEMIS observations of proton pitch angle distributions in the ring current during the 29 May 2010 geomagnetic storm


Metadata FieldValueLanguage
dc.contributorJ. D. Perez, perez@auburn.eduen_US
dc.creatorGrimes, E. W.
dc.creatorPerez, J. D.
dc.creatorGoldstein, J.
dc.creatorMcComas, D. J.
dc.creatorValek, P.
dc.creatorTurner, D.
dc.date.accessioned2020-06-09T20:15:36Z
dc.date.available2020-06-09T20:15:36Z
dc.date.created2013-08
dc.identifier10.1002/jgra.50455en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/jgra.50455en_US
dc.identifier.urihttp://hdl.handle.net/11200/49869
dc.description.abstractThe first comparison between energy-dependent ion pitch angle distributions in the ring current deconvolved from Two Wide-angle Imagining Neutral-atom Spectrometers (TWINS) energetic neutral atom (ENA) images and measured by Time History of Events and Macroscale Interactions during Substorms (THEMIS) D and E during a magnetic storm on 29 May 2010 is shown. The ion intensities and energy spectra along the THEMIS path are also compared with those deconvolved from the TWINS ENA images. The global plots of the ion intensities show an asymmetric ring current in the early recovery phase consistent with the ASY/H index. The comparison between the in situ pitch angle distributions observed by THEMIS and those obtained here from TWINS ENA images lends credence to the global plots of pitch angle anisotropy provided by the TWINS data. The spatial dependence of the pitch angle anisotropy provides information relevant to ion precipitation and lifetimes of trapped ring current ions not available from in situ measurements.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries2169-9380en_US
dc.subjectpitch angle distributions; energetic neutral atoms; magnetic storm; magnetosphereen_US
dc.subjectINNER MAGNETOSPHERE; DENSITY; IMAGE; TIMEen_US
dc.titleComparison of TWINS and THEMIS observations of proton pitch angle distributions in the ring current during the 29 May 2010 geomagnetic stormen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume118en_US
dc.citation.issue8en_US
dc.citation.spage4895en_US
dc.citation.epage4905en_US
dc.description.statusPublisheden_US

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