Abstract

Accurate measurements of collision-induced absorption by O₂ and O₂–N₂ mixtures in the fundamental band near 6.4 µm have been made. A Fourier-transform spectrometer was used with a resolution of 0.5 cm^-1. Absorption has been investigated in the 0–20-atm and 193–293 K pressure and temperature ranges, respectively. The current measurements confirm that the broad O₂ continuum carries small features whose attribution is not yet clear. Available experimental data in the 190–360 K temperature range have been used to build a simple, low cost computer, empirical model that is well adapted for computation of atmospheric O₂ absorption. Tests show that it is accurate, contrary to predictions of widely used atmospheric transmission codes.

© 1997 Optical Society of America

Infrared collision-induced absorption by N₂ near 4.3 μm for atmospheric applications: measurements and empirical modeling

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Measurements and empirical modeling of pure CO₂ absorption in the 2.3-μm region at room temperature: far wings, allowed and collision-induced bands

M. V. Tonkov, N. N. Filippov, V. V. Bertsev, J. P. Bouanich, Nguyen Van-Thanh, C. Brodbeck, J. M. Hartmann, C. Boulet, F. Thibault, and R. Le Doucen
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Collision-induced absorption in the fundamental band of N₂: temperature dependence of the absorption for N₂–N₂ and N₂–O₂ pairs

V. Menoux, R. Le Doucen, C. Boulet, A. Roblin, and A. M. Bouchardy
Appl. Opt. 32(3) 263-268 (1993)

Analysis of the fascode model and its H₂O continuum based on long-path atmospheric transmission measurements in the 4.5–11.5-μm region

J.-M. Thériault, P. L. Roney, D. St.- Germain, H. E. Revercomb, R. O. Knuteson, and W. L. Smith
Appl. Opt. 33(3) 323-333 (1994)

Temperature dependence of the absorption in the region beyond the 4.3-μm band head of CO₂. 2: N₂ and O₂ broadening

C. Cousin, R. Le Doucen, C. Boulet, and A. Henry
Appl. Opt. 24(22) 3899-3907 (1985)