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AMPTE CCE observations of Pc 3-4 pulsations at L = 2-6Magnetic field data acquired by the AMPTE CCE satellite from L = 2-6 are analyzed. A procedure was specially developed to reduce the artificial modulation and noise in magnetic field measurements, making it possible to detect Pc 3-4 pulsations with amplitudes only 1 nT or less, even for L values less than 3. A survey of 41 CCE passes in L = 2-6 and in the postnoon sector showed that the most commonly observed pulsations in this region were the east-west oscillations of magnetic field with clearly L-dependent frequencies; these are identified as the toroidal mode standing Alfven waves. A relationship was found between the pulsation frequency and plasma density, showing that the pulsation data can be used to estimate the plasma mass density in the inner magnetosphere.
Document ID
19910025793
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Takahashi, Kazue
(Johns Hopkins Univ. Laurel, MD, United States)
Anderson, Brian J.
(Johns Hopkins University Laurel, MD, United States)
Strangeway, Robert J.
(California, University Los Angeles, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
91A10416
Funding Number(s)
CONTRACT_GRANT: NAG5-863
CONTRACT_GRANT: N00039-87-C-5301
Distribution Limits
Public
Copyright
Other

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