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Structure of the plasmapause from ISEE 1 low-energy ion and plasma wave observationsLow-energy ion pitch angle distributions are compared with plasma density profiles in the near-earth magnetosphere using ISEE 1 observations. The classical plasmapause determined by the sharp density gradient is not always observed in the dayside region, whereas there almost always exists the ion pitch angle distribution transition from cold, isotropic to warm, bidirectional, field-aligned distributions. In the nightside region the plasmapause density gradient is typically found, and it normally coincides with the ion pitch angle distribution transition. The sunward motion of the plasma is found in the outer part of the 'plasmaspheric' plasma in the dusk bulge region.
Document ID
19850058062
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nagai, T.
(NASA Marshall Space Flight Center Huntsville, AL; Meteorological Research Institute, Tsukuba, Japan)
Horwitz, J. L.
(Alabama, University Huntsville, United States)
Anderson, R. R.
(Iowa, University Iowa City, United States)
Chappell, C. R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A40213
Funding Number(s)
CONTRACT_GRANT: NAS8-33982
CONTRACT_GRANT: NSF ATM-83-00426
Distribution Limits
Public
Copyright
Other

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