High resolution observations of the 6300 A oxygen line in the day airglow

Details High resolution observations of the 6300 A oxygen line in the day airglow High resolution observations of the 6300 A oxygen line in the day airglow

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..185b&link_type=abstract

Planetary and Space Science, vol. 25, Feb. 1977, p. 185-191.

Computer Science

9

Atmospheric Temperature, Dayglow, Oxygen Spectra, Spectral Resolution, Upper Atmosphere, Doppler Effect, Forbidden Transitions, High Resolution, Oxygen Atoms, Solar Spectra, Spectral Line Width

Scientific paper

Results are reported for ground-based observations of zenith day-sky spectra in the vicinity of 6300 A performed with sufficient precision and spectral resolution to measure the spectral width of the 6300-A oxygen emission feature. Spectra were recorded only in a polarization with the electric vector in or near the scattering plane defined by the sun, the point being observed, and the spectrometer; the oxygen dayglow feature is delineated by detailed comparison with an averaged solar spectrum. The results obtained from 23 data sets of unequal quality show that the 6300-A line generally appeared in the expected place, was clearly present in the day-sky spectra, and was clearly absent in the solar spectra. It is found that the average apparent emission rate of the 6300-A feature was always less than 10 kR, that the line intensity exhibited a steady decrease with solar zenith angle, and that the line width gave no indication of the excitation mechanism involved. Measurement of upper-atmospheric temperature based on the 6300-A line width is discussed.

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