Computer Science
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nrl..reptq....a&link_type=abstract
Final Report Naval Research Lab., Washington, DC. Center for Space Research.
Computer Science
Angles (Geometry), Diurnal Variations, Solar Radiation, Troposphere, Atmospheric Models, Comparison, Predictions, Scattering, Stratosphere, Time Dependence
Scientific paper
Time dependent calculations of minor species distributions require as input the solar radiation field as a function of altitude and solar zenith angle. An isotropic spherical model of the radiation field has been developed to determine the solar radiation field in twilight. Comparison of the spherical model with a plane parallel model of the multiple scattering of radiation at twilight shows that: (1) for solar zenith angles less than 95 deg., plane parallel solutions are suitable if the initial deposition of solar energy is calculated for a spherical atmosphere; (2) for solar zenith angles greater than 95 deg., the plane parallel radiation field is several orders of magnitude smaller than that calculated with the spherical model; (3) at altitudes above 40 km, the spherical model predicts 10-20% less radiation than the radiation field calculated with the plane parallel model.
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