Physics
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22...69b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 1, p. 69-72
Physics
11
Auroras, Boundaries, Earth Atmosphere, Electron Precipitation, Electron Spectroscopy, Angular Acceleration, Electron Acceleration, Electron Transitions, Satellite Observation, Velocity Measurement
Scientific paper
An approximately 2-ms transition in auroral electron precipitation observed by the TESP electron spectrometer on Freja is described. The lack of significant pitch-angle dependent velocity dispersion in the observations implies that the transition is an approximately 10-m spatial, rather than temporal, boundary. There is no evidence of associated changes in the accelerating potential. Either the source population, or the mechanism allowing entry of the source population to the acceleration region, must provide for the sharp observed transitions. The energy fluxes are such that the regions of stronger precipitation are marginally visible arcs.
Boehm M. H.
Clemmons James
Paschmann Goetz
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