Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.6212v&link_type=abstract
American Astronomical Society, DPS meeting #38, #62.12; Bulletin of the American Astronomical Society, Vol. 38, p.607
Astronomy and Astrophysics
Astronomy
Scientific paper
To support atmospheric remote sensing studies and obtain total column CO2 measurements with a precision of 0.3%, accurate values of ro-vibrational constants, vibrational band intensity and Herman-Wallis coefficients, self- and air-broadening and self- and air-induced pressure-shift coefficients have been measured for the CO2 bands in the 6280 to 6380 cm-1 spectral region from high-resolution (0.01-cm-1) long-path absorption spectra. In addition, line mixing coefficients in the P- and R-branches have also been determined using the off-diagonal relaxation matrix elements for both self- and air-broadening. A multispectrum nonlinear least squares fitting technique modified to include line mixing and speed-dependent line shape and the capability to constrain various spectral line parameters (e.g. positions and intensities) has been applied in the analysis to maximize the accuracy of the retrieved parameters. In addition to the 2201←0000 combination band, rotational constants and intensity parameters were measured for five additional bands that appeared in the same spectral region. The data used in this study were recorded at room temperature with the McMath-Pierce Fourier transform spectrometer (FTS) located at the National Solar Observatory on Kitt Peak. Where appropriate, present results are compared with previous measurements reported in the literature.
Part of the research described in this paper was performed at the Jet Propulsion laboratory, California Institute of Technology under contracts and cooperative agreements with the National Aeronautics and Space Administration. The research conducted at the College of William and Mary is supported by the National Science Foundation under Grant No. ATM-0338475.
Benner Chris D.
Brown Raymon L.
Miller Charles E.
Toth Robert A.
Venkataraman Malathy D.
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