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Wave intensifications near the electron cyclotron frequency within the polar cuspAs DE 1 flew through the polar cusp, enhanced narrowband electrostatic waves were sometimes observed just above the electron cyclotron frequency. Here, wave and particle measurements from three representative cusp transits are presented in order to characterize these signals and understand the conditions that favor their generation. It was found that the form of the local cusp electron velocity distribution had a direct influence on the wave spectral character. A preliminary study indicates that electron beams in the cusp can generate the enhanced signals, although generation by an anisotropic warm component cannot be ruled out.
Document ID
19900047750
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Farrell, W. M.
(NASA Goddard Space Flight Center Greenbelt, MD; Iowa, University, Iowa City, United States)
Gurnett, D. A.
(Iowa, University Iowa City, United States)
Menietti, J. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wong, H. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lin, C. S.
(Southwest Research Institute San Antonio, TX, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
90A34805
Funding Number(s)
CONTRACT_GRANT: NAG5-310
CONTRACT_GRANT: NAS5-28711
CONTRACT_GRANT: NAGW-1620
CONTRACT_GRANT: NAGW-1488
Distribution Limits
Public
Copyright
Other

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