Physics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7121p&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Sept. 1, 1983, p. 7121-7130. Research supported by the Lockheed Indep
Physics
6
Auroral Arcs, Electron Precipitation, Electron Flux Density, Temporal Distribution, Velocity Distribution, Vertical Distribution
Scientific paper
Several examples of velocity dispersions of precipitating electrons observed during a rocket flight in the dayside auroral oval on December 17, 1974, were investigated. It is shown that these dispersion effects can be caused by a moving source of finite width and constant intensity, and do not result only from a purely temporal modulation of the source. This spatial model can be improved by incorporating the dispersion originating from a superimposed convection velocity. It is shown that the source altitudes implied by the two models (temporal and spatial) differ. The results of one of the cases examined were found to be inconsistent with the temporal model and required further modification of the spatial model to include an energy dependent source with, in line with expectations from an acceleration in a V-shaped electric field pattern. A source altitude of approximately 3500-5000 km is obtained employing the latter model.
Haerendel Gerhard
Papamastorakis Janis
Paschmann Goetz
Sckopke Norbert
Shelley Edward G.
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