title: Multispectrum analysis of the oxygen A-band.
abstract: Retrievals of atmospheric composition from near-infrared measurements require measurements of airmass to better than the desired precision of the composition. The oxygen bands are obvious choices to quantify airmass since the mixing ratio of oxygen is fixed over the full range of atmospheric conditions. The OCO-2 mission is currently retrieving carbon dioxide concentration using the oxygen A-band for airmass normalization. The 0.25% accuracy desired for the carbon dioxide concentration has pushed the required state-of-the-art for oxygen spectroscopy. To measure O2A-band cross-sections with such accuracy through the full range of atmospheric pressure requires a sophisticated line-shape model (Rautian or Speed-Dependent Voigt) with line mixing (LM) and collision induced absorption (CIA). Models of each of these phenomena exist, however, this work presents an integrated self-consistent model developed to ensure the best accuracy. It is also important to consider multiple sources of spectroscopic data for such a study in order to improve the dynamic range of the model and to minimize effects of instrumentation and associated systematic errors. The techniques of Fourier Transform Spectroscopy (FTS) and Cavity Ring-Down Spectroscopy (CRDS) allow complimentary information for such an analysis. We utilize multispectrum fitting software to generate a comprehensive new database with improved accuracy based on these datasets. The extensive information will be made available as a multi-dimensional cross-section (ABSCO) table and the parameterization will be offered for inclusion in the HITRANonline database.
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Drouin
authors.affiliation: Department of Physics, College of William and Mary, Williamsburg, VA, USA.
authors.forename: D Chris
authors.initials: DC
authors.lastname: Benner
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Linda R
authors.initials: LR
authors.lastname: Brown
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Cich
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Crawford
authors.affiliation: Department of Physics, College of William and Mary, Williamsburg, VA, USA.
authors.forename: V Malathy
authors.initials: VM
authors.lastname: Devi
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Alexander
authors.initials: A
authors.lastname: Guillaume
authors.affiliation: Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA.
authors.forename: Joseph T
authors.initials: JT
authors.lastname: Hodges
authors.affiliation: Atmospheric and Environmental Research, Lexington, MA, USA.
authors.forename: Eli J
authors.initials: EJ
authors.lastname: Mlawer
authors.affiliation: National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, USA.
authors.forename: David J
authors.initials: DJ
authors.lastname: Robichaud
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Fabiano
authors.initials: F
authors.lastname: Oyafuso
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Vivienne H
authors.initials: VH
authors.lastname: Payne
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Keeyoon
authors.initials: K
authors.lastname: Sung
authors.affiliation: University of California Berkeley, Department of Physics and Space Sciences Laboratory, Berkeley, CA 94720, USA.
authors.forename: Edward H
authors.initials: EH
authors.lastname: Wishnow
authors.affiliation: Jet Propulsion Laboratory - NASA, California Institute of Technology, 4800, Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Yu
keywords: atmospheric absorption; collision-induced absorption; multispectrum fitting; oxygen; spectral lineshapes