Abstract

Spectral emissivities of water vapor were measured in the 2.7-μ region, at temperatures up to 1273°K. The measurements were used to calculate spectral and integrated infrared radiance of hot water vapor for several cases of interest. The spectrum of hot H₂O is relatively poor in strong “hot” bands, in contrast to the case of CO₂. The general character of the rotational structure in the spectrum of the hot gas is similar to the case of room temperature, although some additional lines are observed at high temperatures. Consequently, care must be taken in selecting the spectral intervals over which radiance integrals are to be calculated.

© 1961 Optical Society of America

Measurements of Infrared Spectral Emissivities of Hot Carbon Dioxide in the 4.3-μ Region*

Richard H. Tourin
J. Opt. Soc. Am. 51(2) 175-183 (1961)

High-Temperature Spectral Emissivities of H₂O–CO₂ Mixtures in the 2.7-μ Region

C. C. Ferriso and C. B. Ludwig
Appl. Opt. 3(12) 1435-1443 (1964)

Emissivity of Water Vapor at 1200°K in the 1.9- and 2.7-µ Regions*

A. Goldman and U. P. Oppenheim
J. Opt. Soc. Am. 55(7) 794-800 (1965)

Study of 1.4-μ, 1.9-μ, and 6.3-μ Water Vapor Bands at High Altitudes*

David G. Murcray, Frank H. Murcray, Walter J. Williams, and Frank E. Leslie
J. Opt. Soc. Am. 51(2) 186-195 (1961)

Spectral-Emissivity Measurements of the 4.3-μ CO₂ Band between 2650° and 3000°K*

C. C. Ferriso, C. B. Ludwig, and L. Acton
J. Opt. Soc. Am. 56(2) 171-173 (1966)