Time-average fluxes of heavy ions at the geostationary orbit

Details Time-average fluxes of heavy ions at the geostationary orbit Time-average fluxes of heavy ions at the geostationary orbit

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5149k&link_type=abstract

Journal of Geophysical Research, vol. 85, Oct. 1, 1980, p. 5149-5152.

Physics

1

Geosynchronous Orbits, Heavy Ions, Particle Flux Density, Satellite Observation, Abundance, Ats 6, Carbon, Helium Ions, Oxygen Ions, Power Spectra, Proton Flux Density

Scientific paper

Measurements of average proton, helium, carbon, and oxygen fluxes at 6.6 earth radii are reported. The data represent averages obtained on ATS 6 between June 15 and Oct. 3, 1974. The energy range covered was 0.36-1.1 MeV for protons and approximately 1-4 MeV for the heavier ions. The results indicate that above about 1 MeV the heavier ion fluxes dominate over the proton flux on the energy/ion scale. Using two different spectral dependencies to fit the data, the carbon to oxygen concentration ratio for energies above 1 MeV was found to be 0.43 for the power law spectrum and 0.44 for the exponential spectrum. Thus in either case the abundance ratio is consistent with the solar origin of the particles. Similarly, the helium to oxygen concentration ratio is found to be 0.17 for the power law spectrum and 0.28 for the exponential spectrum. This is inconsistent with the solar wind ratio, which is about 10. The results quoted above are based on a very small portion of the distribution function above 1 MeV.

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