Heavy ion measurements in the synchronous altitude region

Computer Science

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Angular Distribution, Energetic Particles, Equatorial Atmosphere, Equatorial Orbits, Heavy Ions, Abundance, High Altitude, Iron, Magnetospheric Ion Density, Periodic Variations, Pitch (Inclination), Proton Density (Concentration), Scatha Satellite, Spaceborne Telescopes

Scientific paper

Energetic heavy ion data acquired in March and April 1979 by the SCATHA satellite in high altitude equatorial orbit are presented. Si semiconductor telescopes were used to detect protons and heavier ions. Ion pitch angle distributions were strongly peaked at noon and were substantially less than 90 deg in the midnight sector. He ions were detected in the energy range of 98-240 keV at L equals 5.6. Total pitch angle counts at all pitch angles are given for a five-day period in April, and are noted to display no Fe counts. The heavy ion fluxes in the region of the magnetosphere covered by SCATHA were highly time variable, implying regular injection events as well as strong loss processes. The absence of energetic Fe nuclei in the outer magnetosphere is taken to indicate that lower energy Fe ions may be present, depending on their charge state.

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