Physics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977georl...4..403j&link_type=abstract
Geophysical Research Letters, vol. 4, Oct. 1977, p. 403-406.
Physics
8
Ionospheric Currents, Ionospheric Ion Density, Magnetic Storms, Ring Currents, Satellite Observation, Energy Spectra, Helium Ions, Hydrogen Ions, Ionospheric Composition, Mass Spectroscopy, Oxygen Ions
Scientific paper
O(+), He(+), and H(+) ions in the energy range 0.5 to 16 keV have been observed in the storm-time ring current with an energetic ion mass spectrometer aboard the polar-orbiting S3-3 satellite. During the main phases of the 29 December 1976, 6 April 1977, and 19 April 1977 magnetic storms, the O(+) number density within the instrument energy range in the inner ring current (L = 2.8-4.0) was larger than the H(+) density in the altitude range from about 5000-7000 km. At two days after the main phase of the 29 December 1976 storm, O(+) was still the dominant ion at MLT = 14.5 hours in the L = 2.6-3.4 range at altitudes near 6000 km.
Johnson Richard G.
Sharp R. D.
Shelley Edward G.
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