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Determining the source region of auroral emissions in the prenoon oval using coordinated Polar BEAR UV-imaging and DMSP particle measurementsThe Polar Beacon Experiment and Auroral Research (Polar BEAR) satellite included the capability for imaging the dayside auroral oval in full sunlight at several wavelengths. Particle observations from the DMSP F7 satellite during dayside auroral oval crossings are compared with approximately simultaneous Polar BEAR 1356-A images to determine the magnetospheric source region of the dayside auroral oval. The source region is determined from the DMSP particle data, according to recent work concerning the classification and identification of precipitation source regions. The close DMSP/Polar BEAR coincidences all occur when the former satellite is located between 0945 and 1000 MLT. Instances of auroral arcs mapping to each of several different regions, including the boundary plasma sheet, the low-latitude boundary layer, and the plasma mantle were found. It was determined that about half the time the most prominent auroral arcs are located at the interfaces between distinct plasma regions, at least at the local time studied here.
Document ID
19920068571
Document Type
Reprint (Version printed in journal)
Authors
Newell, Patrick T. (NASA Headquarters Washington, DC United States)
Meng, CHING-I. (Johns Hopkins University Laurel, MD, United States)
Huffman, Robert E. (USAF, Phillips Laboratory, Hanscom AFB MA, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: A8 A
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF ATM-91-08193
CONTRACT_GRANT: NSF ATM-90-16941
Distribution Limits
Public
Copyright
Other