Abstract
Approximate relations are presented for calculating the mean spectral distribution of the net radiance at the boundary of a nonisothermal gas, given the distributions of temperature, pressure, and composition within the region and the appropriate experimental spectral absorptance data. Experimental data obtained for the 2.7-μ bands of H2O, in which variations in temperature between 900°K to 1200°K were imposed along a 60-cm path at various pressures, are compared with calculations based on a strongline model. A more general band model expression is proposed for intermediate optical depths.
© 1966 Optical Society of America
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