An unusual SAR arc observed during ring current development, 4 August 1972

Details An unusual SAR arc observed during ring current development, 4 August 1972 An unusual SAR arc observed during ring current development, 4 August 1972

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28...69s&link_type=abstract

Planetary and Space Science, vol. 28, Jan. 1980, p. 69-84. Research supported by the National Research Council of Canada;

Computer Science

Atmospheric Electricity, F Region, Red Arcs, Ring Currents, Electron Energy, Energy Spectra, Isis Satellites, Proton Precipitation

Scientific paper

An unusual SAR arc observed during the growth phase of the ring current is described. Proton precipitation was observed, with electron temperature enhancements throughout the region, and an F-region trough present at the equatorward boundary; a high flux of low energy at the SAR arc location and a 'slot' in the ambient electron density are characteristic of this event. Comparisons are made with S3-A spacecraft observations made in the equatorial region at the same time and with Isis-II observations of a more normal SAR arc; the kinetic Alfven process described by Hasegawa and Mima (1978) appears to account for the acceleration of these low energy electrons, although an auroral-type acceleration process cannot be excluded.

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