Abstract

At a given pressure level the atmospheric transmittance for an absorbing gas with a constant mixing ratio varies only with the temperature profile of the atmosphere. A simple transmittance model based on temperature differences is derived for monochromatic radiation. This model then is extended to the more important case of polychromatic radiation through the use of scaling approximations. The resulting algorithm for calculating transmittances for an arbitrary temperature profile is simple to use, accurate, and computationally fast because only arithmetic operations are required. In fact, resulting transmittances agreed with line-by-line calculations to within 0.0031 for the cases tried. Details for calculating the expansion coefficients are provided.

© 1976 Optical Society of America

Atmospheric transmittance of an absorbing gas. 3: A computationally fast and accurate transmittance model for absorbing gases with variable mixing ratios

Larry M. McMillin, Hernry E. Fleming, and Michael L. Hill
Appl. Opt. 18(10) 1600-1606 (1979)

Atmospheric transmittance of an absorbing gas. 2: A computationally fast and accurate transmittance model for slant paths at different zenith angles

Henry E. Fleming and Larry M. McMillin
Appl. Opt. 16(5) 1366-1370 (1977)

Atmospheric transmittance of an absorbing gas. 4. OPTRAN: a computationally fast and accurate transmittance model for absorbing gases with fixed and with variable mixing ratios at variable viewing angles

L. M. McMillin, L. J. Crone, M. D. Goldberg, and T. J. Kleespies
Appl. Opt. 34(27) 6269-6274 (1995)

Transmittance of atmospheric gases in the microwave region: a fast model

Jonathan R. Eyre and Harold M. Woolf
Appl. Opt. 27(15) 3244-3249 (1988)

Approximation to the Lorentzian coefficient for efficient calculation of transmittance profiles

Joseph H. Pierluissi, Glenn A. Gibson, and Richard B. Gomez
Appl. Opt. 17(9) 1425-1431 (1978)