Other
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.3383k&link_type=abstract
Journal of Geophysical Research, vol. 86, May 1, 1981, p. 3383-3388. NSF-Navy-supported research.
Other
39
Atmospheric Composition, Ion Distribution, Ionospheric Ion Density, Particle Energy, Particle Mass, Spectral Energy Distribution, Abundance, Helium Ions, Hydrogen Ions, Oxygen Ions, Particle Flux Density, Plasma Layers, Scatha Satellite
Scientific paper
The study investigates the ion mass composition of the zipper distributions observed by the SCATHA satellite to determine whether different source regions are indicated for the high and low portions of the distributions. Such differences are in fact found. The low-energy field-aligned portion of the zipper distribution is composed primarily of O(+), along with some H(+), and traces of He(+); this suggests that this portion of the distribution is ionospheric in origin. On the other hand, the higher-energy perpendicular particles were primarily H(+), with the relative O(+) abundance down from that of the lower-energy population by about a factor of 10. Thus, the results indicate that whereas the low-energy parallel fluxes are probably directly injected from the ionosphere, the higher-energy perpendicular fluxes are most probably convected in from the plasma sheet.
Johnson Richard G.
Kaye Stanley M.
Sharp R. D.
Shelley Edward G.
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