Physics
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37..377l&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 37, Feb. 1975, p. 377-381.
Physics
2
Atmospheric Density, Electromagnetic Absorption, Ionospheric Electron Density, Ionospheric Propagation, Radio Attenuation, Absorption Spectra, Annual Variations, Atmospheric Composition, Atmospheric Ionization, Atmospheric Pressure, Atmospheric Temperature, Collision Rates, Line Spectra, Lower Ionosphere, Lyman Alpha Radiation, Nitric Oxide, Recombination Coefficient, Vertical Distribution, Winter
Scientific paper
Under the assumption that the height distribution of NO does not change between summer and winter a height region was found where the neutral atmosphere density, pressure and temperature changes can significantly affect the radio-wave absorption. This is caused by the different behaviour of Lyman-alpha ionization with respect to other major ionization sources and by the dependence of the effective recombination coefficient on temperature. This phenomenon can qualitatively explain the regular winter increase of nonanomalous absorption (Schwentek, 1971).
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