The NASA band model formulation, originally employed for missile base heating predictions, has been modified to allow the calculation of radiance, radiant intensity, transmission, etc., from a gas. This model has been evaluated by comparing its predictions to laboratory data on H20, C02f and various mixtures containing these gases. The calculations reproduced the measured values for homogeneous and inhomogeneous samples of H2O to within about +20%. The agreement with measured values for CO2 was not as good, especially at low pressures. The theoretically derived band model parameters for C02 appear to be in error. For mixtures of H20, CO2/ and other gases (H2,CO,H2), the agreement was good.

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