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East-west ion drifts at mid-latitudes observed by Dynamics Explorer 2The effects of the dynamo electric fields and the penetration of high-latitude electric fields on zonal ion drifts were investigated by examining east-west ion drifts at mid-latitudes observed during magnetically quiet and disturbed periods by the polar orbiting DE-2 spacecraft. The influences of the electric field sources can be summarized as follows: (1) semidiurnal and terdiurnal tides are most important during quiet times between 25 deg and 55 deg magnetic local time, (2) the influence of the disturbance dynamo and magnetospheric penetration field are seen on average down to 45 deg during quiet times and down to 35 deg during disturbed times, and (3) direct influence of the auroral zone electric field is important on average down to 60 deg during quiet times and down to 50 deg during disturbed times.
Document ID
19930037010
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Heelis, R. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Coley, W. R.
(Texas Univ. at Dallas, Richardson, United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: A12
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A21007
Funding Number(s)
CONTRACT_GRANT: F19628-90-K-0001
CONTRACT_GRANT: NAG5-306
CONTRACT_GRANT: NAG5-305
Distribution Limits
Public
Copyright
Other

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