# NEAR INFRARED SPECTROSCOPY OF CARBON DIOXIDE: $^{16}O^{12}C^{16}O$ LINE POSITIONS

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 Title: NEAR INFRARED SPECTROSCOPY OF CARBON DIOXIDE: $^{16}O^{12}C^{16}O$ LINE POSITIONS Creators: Miller, Charles E.; Brown, L. R. Issue Date: 2003 Publisher: Ohio State University Abstract: High-resolution near infrared $4000 - 9000 cm^{-1}$ spectra of carbon dioxide have been recorded using the McMath-Pierce Fourier transform spectrometer at the Kitt Peak National Solar Observatory. Spectroscopic constants have been determined for 53 different vibrational states of the $^{16}O^{12}C^{16}O$ isotopologue, including 8 vibrational states for which laboratory spectra have not previously been reported. Calibration using the 2-0 band of CO near $4200 cm^{-1}$ and the $(\nu_{1} + \nu_{3})$ combination band of $C_{2}H_{2}$ near $6500 cm^{-1}$ provides absolute line position accuracies of $2 \times 10^{-5} cm^{-1}$ (RMS) for strong, isolated transitions throughout the observed range. Fits with RMS errors less than $3.8 \times 10^{-5} cm^{-1}$ have been obtained for the $20013 \leftarrow 00001, 20012 \leftarrow 00001$, and $20011 \leftarrow 00001$ bands and RMS errors less than $6 \times 10^{-5} cm^{-1}$ have been obtained for the $30014 \leftarrow 00001, 30013 \leftarrow 00001, 30012 \leftarrow 00001$, and $00031 \leftarrow 00001$ bands. The new line list satisfies the line position accuracies required for the next generation of $CO_{2}$ remote sensing instruments, improves the capability of solarviewing spectrometers to retrieve precise column $CO_{2}$ measurements, and provides a secondary frequency standard in the $NIR.^{a}$ Description: $^{a}$Part of the research described in this paper was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Author Institution: Department of Chemistry, Haverford College; Jet Propulsion Laboratory, California Institute of Technology URI: http://hdl.handle.net/1811/20804 Other Identifiers: 2003-MG-05