Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.5781b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 1, 1990, p. 5781-5790. Research supported by NSERC.
Physics
15
Auroral Zones, Ground Truth, Polar Regions, Satellite Imagery, Ultraviolet Photography, Data Processing, Diurnal Variations, High Resolution, Viking Spacecraft
Scientific paper
High-time-resolution satellite UV images of the northern auroral oval are compared with South Pole station keogram camera and all-sky camera observations to determine the displacement of the South Pole conjugate point from its location calculated using the international geomagnetic reference field magnetic-field model. The results presented extend the study of optical conjugacy to high magnetic latitudes in a solstice period, and to sunlit auroral events. Three high-latitude events were analyzed: a poleward expansion, an arc poleward of the midnight oval, and a substantial movement in the afternoon auroral oval. They were determined to occur on closed field lines. A range of displacement for the South Pole conjugate point of 5.3 deg in latitude and 1.9 hours in MLT was measured.
Berkey Tom F.
Burns Gary B.
Eather R. A.
McEwen Don J.
Murphree John S.
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