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Plasma and electric field boundaries at high and low altitudes on July 29, 1977Hot plasma observations at high and low altitudes were compared. The plasma ion composition at high altitudes outside the plasmasphere was 0+. Heavy ions were also observed at low altitudes outside the plasmasphere. It is shown that at times these ions are found well below the plasmapause inside the plasmasphere. Comparisons of the low altitude plasma and dc electric fields show that the outer limits of the plasmasphere is not always corotating at the low L-shells. The corotation boundary, the estimated plasmapause boundary at the boundary of the inner edge of plasma sheet ions were at the same position. The inner edge of plasma sheet electrons is observed at higher latitudes than the plasmasphere boundary during disturbed times. The inner edge of the plasma sheaths shows a strong dawn to dusk asymmetry. At the same time the inner edge of the ring current and plasma sheath also moves to high latitudes reflecting an apparent inflation of the magnetosphere.
Document ID
19820009839
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fennell, J. F. (Aerospace Corp. El Segundo, CA, United States)
Johnson, R. G. (Lockheed Missiles and Space Co. Palo Alto, Calif., United States)
Young, D. T. (Bern Univ. Berkeley, United States)
Torbert, R. B. (California Univ. Durham, United States)
Moore, T. E. (New Hampshire Univ.)
Date Acquired
September 4, 2013
Publication Date
January 12, 1982
Subject Category
Geophysics
Report/Patent Number
NASA-CR-165118
ATR-82(7883)-2
Accession Number
82N17713
Funding Number(s)
CONTRACT_GRANT: NSF ATM-78-03600
CONTRACT_GRANT: NSF ATM-80-00518
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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