Computer Science
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24.1141t&link_type=abstract
Planetary and Space Science, vol. 24, Dec. 1976, p. 1141-1150.
Computer Science
Airglow, Emission Spectra, Ionospheric Electron Density, Night Sky, Photoelectrons, Vertical Distribution, Conjugate Points, Coulomb Collisions, Luminous Intensity, Ogo-4, Oxygen Spectra, Particle Collisions
Scientific paper
Emission profiles of the 6300-A line are determined from OGO 4 data in the dark ionosphere during conjugate sunrise. From electron-density profile measurements, it is shown that, for two cases studied, recombination cannot account for the measured O 1D emission profiles. However, direct photoelectron-oxygen excitation can reproduce the data. If the photoelectron escape flux in the sunlit ionosphere, computed from standard photoelectron production, is transmitted through the field tube with an additional attenuation of 0.6 due to angular diffusion through photoelectron-electron and photoelectron-ion Coulomb collisions, the Hinteregger (1965) solar-flux data must be increased by a factor 2, which agrees with previous results.
Blamont E. J. E. J.
Lejeune G.
Thuillier Gerard
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