Altitude variation of ultraviolet oxygen night airglow

Details Altitude variation of ultraviolet oxygen night airglow Altitude variation of ultraviolet oxygen night airglow

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.114..387o&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 114, no. 2, Sept. 1985, p. 387-393.

Computer Science

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2

Emission Spectra, Nightglow, Oxygen Spectra, Rocket Sounding, Ultraviolet Spectra, Vertical Distribution, Altitude, Atmospheric Models, Electron Density (Concentration), Spectral Energy Distribution

Scientific paper

Night airglow of oxygen 130.4 and 135.6 nm emissions was measured by a spectrophotometer aboard an S520 sounding rocket, launched at 19:50 JST (10:50 UT) on February 14, 1982 from Kagoshima, Japan. The altitude variation of the emissions was obtained from 110 to 266 km at zenith angles of 35.5 plus or minus 4 deg. The emission intensity around 260 km was about 160 R and is roughly compatible with model calculations taking account of O(+) + e(-) radiative recombination as well as O(+) - O(-) mutual neturalization. Some excess of about 50 R, compared to the model calculation, was observed around 200 km. Possible explanations of the excess are: (1) remnant oxygen ions during the transition period from day to night and (2) diffuse radiation from the background sky. Model calculations taking account of remnant oxygen ions were also performed by adding an excess electron density to the original density profile. However, it was found that an unreasonably large electron density is required around 200 km about 550,000 per cu cm to produce the observed intensity. It is also probable that some contribution from the background sky is present in the observed intensity.

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