Satellite observations of OII (7320-7330 A) emission in aurora

Details Satellite observations of OII (7320-7330 A) emission in aurora Satellite observations of OII (7320-7330 A) emission in aurora

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..845c&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, July 1987, p. 845-850. Research supported by the Bulgarian Committee for

Computer Science

4

Auroras, Emission Spectra, Ionospheric Ion Density, Oxygen Ions, Satellite Observation, Electron Energy, Gas Density, Monatomic Gases, Photometry

Scientific paper

Characteristics of the OII (7320-7330 A) emission in aurora are investigated based on photometric observations obtained by the IC-Bulgaria-1300 satellite in 1981 and 1982. Model values of the I(7320/I(4278) emission rate ratio are found to be in agreement with observations for low ratios. The systematic increase noted for the I(7320)/I(4278) emission rate ratio with increasing I(5577)/I(4278) confirms that the oxygen concentration is the common factor influencing the emissions. Although the I(7320)/I(4278) ratio also varies with electron mean energy, it is suggested, for typical electron energy spectra, that the changes are less important than those caused by changes in neutral composition.

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