Observations of the O2 column density between 120 and 70 km and absorption cross section in the vicinity of H Lyman alpha

Details Observations of the O2 column density between 120 and 70 km and absorption cross section in the vicinity of H Lyman alpha Observations of the O2 column density between 120 and 70 km and absorption cross section in the vicinity of H Lyman alpha

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1481p&link_type=abstract

Journal of Geophysical Research, vol. 82, Apr. 1, 1977, p. 1481-1486.

Physics

2

Absorption Cross Sections, Gas Density, Lower Ionosphere, Lyman Alpha Radiation, Molecular Absorption, Oxygen, H Alpha Line, Optical Thickness, Schumann-Runge Bands, Solar Spectra

Scientific paper

From solar spectra obtained during the re-entry of Calroc 4 the optical depth of the atmosphere in the wavelength interval 1213-1219 A has been obtained for altitudes between about 120 and 70 km. The data are consistent with the interpretation that molecular oxygen is the primary absorbing species under these conditions if the values of the O2 cross section in the 1216.2- to 1217.2-A region are approximately those of Ogawa (1968) and the O2 column densities in the 80-km region are approximately those derived from the 8-0 and 11-0 Schumann-Runge bands observed during the same flight.

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