Computer Science – Sound
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..547t&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 38, April 1990, p. 547-554.
Computer Science
Sound
23
Airglow, Equatorial Regions, F 2 Region, Photometers, Rocket-Borne Photography, Electron Density Profiles, Emission Spectra, Nocturnal Variations, Thermosphere
Scientific paper
OI 6300 A (1D - 3P) and OI 5577 A (1S -1D) airglow emission profiles were measured in the equatorial region, Natal, by photometers on board a sounding rocket. The two emissions showed similar profiles in the F-region, peaking at around 230 km, with widths of 50-60 km. The overhead zenith intensities below the thermospheric emission layers were 52 Rayleighs (R) for OI 5577 A and 310 R for OI 6300 A, giving an intensity ratio of 0.17. The ratio between the volume emission rates was found to vary with height from 0.25 at 200 km to 0.09 at 310 km. The ratio between the quantum yields f(1S) and f(1D), also found to be a function of height and varying from 0.02 at 200 km to 0.08 at 270 km, showed a good correlation with the simultaneously observed electron density profile. This suggests that the quantum yield f(1S) of the O(1S) production channel of the dissociative recombination process is related in some degree to the electron density.
Abdu Mangalathayil Ali
Batista Pedro
Clemesha Barclay R.
Sahai Yogeshwar
Takahashi Hiroyuki
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