Near infrared spectroscopy of carbon dioxide I.16O12C16O line positions

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. Some 2500 observed positions have been used to determine spectroscopic constants for 53 different vibrational states of the (OCO)-O-16-C-12-O-16 isotopologue, including eight vibrational states for which laboratory spectra have not previously been reported. Calibration by simultaneous use of CO near 4200cm(-1) and C F[2 near 6500cm(-1) provides absolute line position accuracies of 6.0 x 10(-5) cm(-1) (RMS) for strong, isolated transitions throughout the observed range. Fits with RMS errors <3.8 x 10(-5) cm(-1) have been obtained for the 20013 <-- 00001, 20012 <-- 00001, and 20011 <-- 00001 bands. RMS errors <6 x 10(-5) cm(-1) have been obtained for the 30014 <-- 00001, 30013 <-- 00001, 30012 <-- 00001, and 00031 <-- 00001 bands. and RMS errors < 5 x 10(-4) cm(-1) for even the weakest fitted bands. This work reduces CO2 near-infrared line position uncertainties by a factor of 10 or more compared to the 2000 HITRAN line list, which has not been modified since the comprehensive work of Rothman et al. [J. Quant. Spectrosc. Rad. Transfer 48 (1992) 537]. The new line list satisfies the line position accuracies required for the next generation of CO2 remote sensing instruments, improves the capability of solar-viewing spectrorneters to retrieve precise column CO2 measurements, and provides a secondary frequency standard in the near-infrared. (C) 2003 Elsevier Inc. All rights reserved.