Near-Infrared Carbon Dioxide Spectral Database

A new spectroscopic database for carbon dioxide in the near infrared is presented to support remote sensing of the terrestrial planets (Mars, Venus and the Earth). The compilation contains over 28,500 transitions of 213 bands from 4300 to 7000 cm_1 and involves nine isotopologues: 16O12C16O (626), 16O13C 16O (636), 16O12C 18O (628), 16O12C 17O (627), 16O13C 18O (638), 16O13C 17O (637), 18O12C 18O (828), 17O12C 18O (728), and 18O13C 18O (838). Calculated line positions, line intensities, Lorentz half width and pressure-induced shift coefficients for self and air broadening are taken from our recent measurements and are presented for the Voigt molecular line shape. The database includes line intensities for 153 bands measured using the McMath-Pierce Fourier transform spectrometer at the Kitt Peak National Solar Observatory. The available broadening parameters (half widths and pressure-induced shifts) of 16O12C 16O are applied to all isotopologues. Broadening coefficients are computed using empirical expressions that have been fitted to the experimental data. The line intensities included in the catalog vary from 4x10_30 to 1.29x10_21 cm_1/(molecule cm_2 ) at 296 K. The research described in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology and the College of William and Mary, under contracts and cooperative agreements with the National Aeronautics and Space Administration.