Mappings of energetic electron precipitation following substorms using the satellite bremsstrahlung technique

Details Mappings of energetic electron precipitation following substorms using the satellite bremsstrahlung technique Mappings of energetic electron precipitation following substorms using the satellite bremsstrahlung technique

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87..671i&link_type=abstract

Journal of Geophysical Research, vol. 87, Feb. 1, 1982, p. 671-680. Research sponsored by the Lockheed Independent Research Pro

Physics

5

Electron Precipitation, High Energy Electrons, Magnetic Storms, Magnetospheric Instability, Bremsstrahlung, Ground Stations, Riometers, Scatha Satellite, Time Response

Scientific paper

The energetic bremsstrahlung X-ray (greater than 21 keV) patterns following substorms is studied using an array of collimated cadmium telluride spectrometers on a spinning polar-orbiting satellite. Pronounced longitude variations in the X-ray intensities and in the precipitating electron fluxes are observed in the daytime sector at various delay times after the onset of substorms near local midnight. Longitude variations in the energy spectra of the bremsstrahlung X-rays are obtained, and coordinated measurements of electrons from the SCATHA satellite at near-synchronous orbit reveal enhancements in the fluxes of trapped electrons on the dayside at the times of the X-ray events, indicating a correlation between the trapped and precipitating electron fluxes. The near equatorial trapped fluxes and the riometer absorption have similar time profiles, showing a close correlation between the trapped and precipitating fluxes of electrons.

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