NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Electron density depletions in the nightside auroral zoneDynamics Explorer 1 measurements are used to investigate regions of low electron density in the nightside auroral zone. Sharply defined regions of low electron density are found in auroral zone crossings from the predusk hours until the early morning hours at all radial distances up to at least 4.6 earth radii. Densities in the auroral cavity are shown to fall to values below 0.3/cu cm. Within the auroral cavity, electron-density-profile variations of a factor of 2 or more on spatial scales of tens of kilometers are found, and the electron plasma frequency to electron cyclotron frequency ratios are 0.02-0.4. The results suggest associations between the density depletions in the nightside auroral zone and auroral acceleration processes.
Document ID
19880042160
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Persoon, A. M.
(Iowa Univ. Iowa City, IA, United States)
Gurnett, D. A.
(Iowa, University Iowa City, United States)
Peterson, W. K.
(Lockheed Missiles and Space Co., Inc. Palo Alto, CA, United States)
Waite, J. H., Jr.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Burch, J. L.
(Southwest Research Institute San Antonio, TX, United States)
Green, J. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Geophysics
Report/Patent Number
AD-A204376
Accession Number
88A29387
Funding Number(s)
CONTRACT_GRANT: N00014-85-K-0404
CONTRACT_GRANT: NGL-16-001-043
CONTRACT_GRANT: NAS5-28710
CONTRACT_GRANT: NAS5-28711
CONTRACT_GRANT: NAG5-310
CONTRACT_GRANT: NGL-16-001-002
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available