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Energy flux and characteristic energy of an elemental auroral structureElectron density profiles acquired with the EISCAT radar at 0.2 s time resolution, together with TV images and photometric intensities, were used to study the characteristics of thin (less than 1 km) auroral arc structures that drifted through the field of view of the instruments. It is demonstrated that both high time and space resolution are essential for deriving the input parameters of the electron flux responsible for the elemental auroral structures. One such structure required a 400 mW/sq m (erg/sq cm s) downward energy flux carried by an 8 keV monochromatic electron flux equivalent to a current density of 50 micro Angstrom/sq m.
Document ID
19950045515
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lanchester, B. S.
(Univ. of Southampton Southampton, United Kingdom)
Palmer, J. R.
(Univ. of Southampton Southampton, United Kingdom)
Rees, M. H.
(Univ. of Southampton Southampton, United Kingdom)
Lummerzheim, D.
(Univ. of Alaska, Fairbanks, AK United States)
Kaila, K.
(Univ. of Oulu Oulu, Finland)
Turunen, T.
(Geophysical Observatory Sodankyla, Finland)
Date Acquired
August 16, 2013
Publication Date
December 15, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 25
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
95A77114
Funding Number(s)
CONTRACT_GRANT: NAGW-3037
Distribution Limits
Public
Copyright
Other

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