Diurnal variation of thermal plasma in the plasmasphere

Details Diurnal variation of thermal plasma in the plasmasphere Diurnal variation of thermal plasma in the plasmasphere

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..765c&link_type=abstract

Planetary and Space Science, vol. 24, Aug. 1976, p. 765-769.

Physics

3

Diurnal Variations, High Temperature Plasmas, Ion Density (Concentration), Upper Atmosphere, Helium Ions, Hydrogen Ions, Mass Spectroscopy, Ogo-5, Satellite-Borne Instruments

Scientific paper

All of the OGO-5 light ion density measurements were used to determine the average global topology of the equatorial plasmasphere density distribution. The variation of the light ion equatorial density at L less than or equal to 3.2 with local time was deduced by determining the average density observed within one hour of a specific local time and within 0.1 of a given L coordinate. The average H(+) density showed a semidiurnal variation with peaks near noon and midnight. The He(+) observations also revealed multiple peaks throughout the day but with smaller amplitudes than those of H(+). At L above 3.2 plasma trough conditions increase the scatter of densities. The average variation of the H(+) density with L within the plasmasphere is found to be steepest near midnight and can be least-squares fitted equally well to either an exponential variation or to a power law.

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