Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417201n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17201-17213.
Physics
17
Auroral Arcs, Ground Truth, Ionospheric Electron Density, Satellite Imagery, Satellite Observation, Dmsp Satellites, Electron Density Profiles, Electron Precipitation, Geomagnetism
Scientific paper
Measurements by the DMSP F6 satellite coordinated with ground-based optical and radar observations of a 'theta-like' sun-aligned auroral arc over Sondre Stromfjord (Greenland) on February 26, 1987 were used to determine the particle characteristics of the arc. The energy distribution of electrons associated with the aurora was soft, with a peak energy of 3.5 keV and a total energy flux of 2.1 ergs/sq cm sec. Based on the incoherent scatter radar returns, the optical emissions within the arc were modeled and compared with observations to show that the production of this arc can be easily explained by electron precipitation only, in accord with the lack of any appreciable Balmer H-alpha emission.
Christensen Andrew B.
Hecht James H.
McCormac F. G.
Meriwether W. Jr. J.
Niciejewski Richard J.
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