ULTRA-HIGH RESOLUTION DETERMINATIONS OF LINE WIDTHS AMD STRENGTHS IN THE 15 $\mu m$ $CO_{2}$ BAND
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Date
1977
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Measurements of transmittance of several isolated lines within the 15 $\mu m$ band of $CO_{2}$ were made using an infrared tunable diode laser as the radiation source. The overall spectral resolution of this system combined with the measurement procedures resulted in a spectral resolution of about $1\times 10^{-4}$ $cm^{-1}$. Line widths and strengths were determined from measurements on pure $CO_{2}$ and a 320ppmv $CO_{2}/N_{2}$ mixture over a path length of 1-meter, a temperature range of $200^\circ K$ to $300^\circ K$ and a pressure range from the Doppler to the Voigt regimes. These are compared with previous results from similar experimental $techniques,^{1,2}$ calculated values of $widths,^{3}$ and with calculations of $strengths^{4,5}$ based on other experimental measurements.
Description
$^{1}$W.G. Planet, J. R. Aronson, and J. F. Butler, J. Mol. Spectrosc. 54, 331 (1975).$^{2}$ J. R. Aronson, P. C. Von Th\""{u}na, and J. F. Butler, Appl. Opt. 14, 1120 (1975). $^{3}$ G. Yamamoto, M. Tanaka, and T. Aoki, J. Quant. Spectrosc. Radiat. Transfer 9, 371 (1969). $^{4}$S. R. Drayson, private communication. $^{5}$L. S. Rothman and R. A. McClatchey, Appl. Opt. 15, 2616 (1976).
Author Institution: National Oceanic and Atmospheric Administration, National Environmental Satellite Service
Author Institution: National Oceanic and Atmospheric Administration, National Environmental Satellite Service