High resolution atmospheric transmission calculations down to 28.7 km in the 200-243-nm spectral range

Details High resolution atmospheric transmission calculations down to 28.7 km in the 200-243-nm spectral range High resolution atmospheric transmission calculations down to 28.7 km in the 200-243-nm spectral range

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apopt..18..964c&link_type=abstract

Applied Optics, vol. 18, Apr. 1, 1979, p. 964-977. Research supported by the Department of the Environment and Fisheries of Cana

Physics

Optics

6

Atmospheric Windows, High Resolution, Molecular Absorption, Ozone, Stratosphere, Ultraviolet Absorption, Absorption Spectra, Balloon Flight, Oxygen, Rayleigh Scattering, Solar Radiation, Spectral Resolution

Scientific paper

Decrease in stratospheric ozone absorption and increase in oxygen absorption with decreasing wavelength combine to produce a window of maximum atmospheric transmission near 210 nm. Since solar radiation in this spectral region dissociates molecular oxygen, the deep atmospheric penetration at this wavelength is of particular aeronomical interest. High resolution calculations of the transmittance down to 28.65 km were made for the 200-243-nm spectral range in this window region, in support of a stratospheric balloon flight from Fort Churchill in July 1974. The calculations were made by dividing the atmosphere into layers which were chosen so that each could be assumed homogeneous; optical depths were calculated separately for each of these layers and then summed to obtain the over-all transmittance of the atmosphere. Absorption by molecular oxygen (line and continuum) and by ozone was included, as well as extinction through Rayleigh scattering by air molecules. The calculated transmittances were combined with high altitude (above 100-km) rocket measurements of the sun-center spectrum and center-to-limb variations to give residual high resolution solar spectral flux for several altitudes and solar zenith angles.

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