Rocket observation of the magnetosphere-ionosphere coupling processes in quiet and active arcs

Details Rocket observation of the magnetosphere-ionosphere coupling processes in quiet and active arcs Rocket observation of the magnetosphere-ionosphere coupling processes in quiet and active arcs

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510679s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10679-10686.

Computer Science

Sound

10

Auroral Arcs, Electron Density (Concentration), Electron Precipitation, Energy Spectra, Magnetosphere-Ionosphere Coupling, Rocket Sounding, All Sky Photography, Electron Acceleration, Electron Cyclotron Heating, Electron Scattering, Maxwell-Boltzmann Density Function, Satellite Observation

Scientific paper

The particle and magnetic field data obtained from two Antarctic sounding rockets launched into quiet and active arcs are analyzed. For both arcs, the field-aligned current density due to the primary electron and the field-aligned potential difference satisfy a linear relationship which is used to estimate the altitude range in which the parallel electric field exists at more than 2 R(E). The electron thermal energy obtained from the Maxwellian fitting procedure increases inside the arcs for both types of arc. The electron heating rate is estimated at 5-40 percent of the total field-aligned potential difference. It is suggested that the electron heating occurs effectively when the field-aligned current intensity exceeds a certain threshold. For the quiet arcs, the inferred electron density is larger outside the arc than inside, while the tendency is opposite for the active arcs observed.

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