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Quiet time equatorial mass density distribution derived from AMPTE/CCE and GOES using the magnetoseismology technique


Metadata FieldValueLanguage
dc.contributorKyungguk Min, kmin@auburn.eduen_US
dc.creatorMin, Kyungguk
dc.creatorBortnik, Jacob
dc.creatorDenton, Richard E.
dc.creatorTakahashi, Kazue
dc.creatorLee, Jeongwoo
dc.creatorSinger, Howard J.
dc.date.accessioned2020-06-05T20:00:36Z
dc.date.available2020-06-05T20:00:36Z
dc.date.created2013-10
dc.identifier10.1002/jgra.50563en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/jgra.50563en_US
dc.identifier.urihttp://hdl.handle.net/11200/49865
dc.description.abstractAn inversion technique for estimating the properties of the magnetospheric plasma from the harmonic frequencies of the toroidal standing Alfven waves has been used to derive the global equatorial mass density covering radial distances from 4 to 9 Earth radii (R-E), within the local time sector spanning from 0300 to 1900h. This broad range of L shell extending to the outer magnetosphere allows us to examine the local time and radial dependence of the quiet time equatorial mass density during solar minimum and thereby construct a global distribution of the equatorial mass density. The toroidal Alfven waves were detected with magnetometers on the Active Magnetospheric Particle Tracer Explorers (AMPTE)/Charge Composition Explorer (CCE) during the nearly 5year interval from August 1984 to January 1989 and on the Geostationary Operational Environmental Satellites (GOES) (10, 11, and 12) for 2years from 2007 to 2008, both of which were operating during solar minimum years. The derived equatorial mass density, (eq), at geosynchronous orbit (GEO) monotonically increases with increasing magnetic local time (MLT) from the nightside toward the dusk sector. At other radial distances, (eq) has the same MLT variation as that of GEO, while the magnitude logarithmically decreases with increasing L value. An investigation of the Dst and Kp dependence shows that the median value of (eq) varies little in the daytime sector during moderately disturbed times, which agrees with previous studies. (eq) calculated from the F-10.7 dependent empirical model shows good agreement with that of CCE but overestimates that of GOES probably due to the extreme solar cycle minimum in years 2007-2008.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.subjectequatorial plasma mass density; magneto-seismology; toroidal-mode Alfven wavesen_US
dc.subjectFIELD LINE DISTRIBUTION; ALFVEN-WAVE HARMONICS; STATISTICAL-ANALYSIS; GEOMAGNETIC-FIELD; ELECTRON-DENSITY; CRRES DATA; MAGNETOSPHERE; MODEL; FREQUENCIES; PULSATIONSen_US
dc.titleQuiet time equatorial mass density distribution derived from AMPTE/CCE and GOES using the magnetoseismology techniqueen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume118en_US
dc.citation.issue10en_US
dc.citation.spage6090en_US
dc.citation.epage6105en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0002-2095-8529en_US

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