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Spectral Line Parameters Including Temperature Dependences of Self- and Air-Broadening in the 2 (left arrow) 0 Band of CO at 2.3 micrometersTemperature dependences of pressure-broadened half-width and pressure-induced shift coefficients along with accurate positions and intensities have been determined for transitions in the 2<--0 band of C-12 O-16 from analyzing high-resolution and high signal-to-noise spectra recorded with two different Fourier transform spectrometers. A total of 28 spectra, 16 self-broadened and 12 air-broadened, recorded using high- purity (greater than or equal to 99.5% C-12-enriched) CO samples and CO diluted with dry air(research grade) at different temperatures and pressures, were analyzed simultaneously to maximize the accuracy of the retrieved parameters. The sample temperatures ranged from 150 to 298K and the total pressures varied between 5 and 700 Torr. A multispectrum nonlinear least squares spectrum fitting technique was used to adjust the rovibrational constants (G, B, D, etc.) and intensity parameters (including Herman-Wallis coefficients), rather than determining individual line positions and intensities. Self-and air-broadened Lorentz half-width coefficients, their temperature dependence exponents, self- and air-pressure-induced shift coefficients, their temperature dependences, self- and air-line mixing coefficients, their temperature dependences and speed dependence have been retrieved from the analysis. Speed-dependent line shapes with line mixing employing off-diagonal relaxation matrix element formalism were needed to minimize the fit residuals. This study presents a precise and complete set of spectral line parameters that consistently reproduce the spectrum of carbon monoxide over terrestrial atmospheric conditions.
Document ID
20120013636
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Devi, V. Malathy
(College of William and Mary Williamsburg, VA, United States)
Benner, D. Chris
(College of William and Mary Williamsburg, VA, United States)
Smith, M. A. H.
(NASA Langley Research Center Hampton, VA, United States)
Mantz, A. W.
(Connecticut Coll. New London, CT, United States)
Sung, K.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Brown, L. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Predoi-Cross, A.
(Lethbridge Univ. Lethbridge, Alberta, Canada)
Date Acquired
August 26, 2013
Publication Date
July 1, 2012
Publication Information
Publication: Journal of Quantitative Spectroscopy and Radiative Transfer
Volume: 113
Issue: 11
Subject Category
Atomic And Molecular Physics
Report/Patent Number
NF1676L-15058
Funding Number(s)
WBS: WBS 281945.02.42.01.98
Distribution Limits
Public
Copyright
Other

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