A discussion is presented on the application of numerical methods to line-by-line and measured transmittance data in the determination of the band model parameters for atmospheric nitrous oxide (N₂O). A double exponential described by three absorber parameters and one spectral parameter is adopted as the analytical transmittance function over the three principal infrared bands. The model developed with the recommended numerical method reproduces the original data with an overall rms deviation of 1.49%. LOWTRAN compatible model parameters are provided at 5-cm^-1 intervals for 20-cm^-1 resolution transmittance calculations, together with a vertical N₂O concentration profile.

© 1984 Optical Society of America

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