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The Fundamental Quadrupole Band of (14)N2: Line Positions from High-Resolution Stratospheric Solar Absorption SpectraThe purpose of this note is to report accurate measurements of the positions of O- and S-branch lines of the (1-0) vibration-rotation quadrupole band of molecular nitrogen ((14)N2) and improved Dunham coefficients derived from a simultaneous least-squares analysis of these measurements and selected infrared and far infrared data taken from the literature. The new measurements have been derived from stratospheric solar occultation spectra recorded with Fourier transform spectrometer (FTS) instruments operated at unapodized spectral resolutions of 0.002 and 0.01 /cm. The motivation for the present investigation is the need for improved N2 line parameters for use in IR atmospheric remote sensing investigations. The S branch of the N2 (1-0) quadrupole band is ideal for calibrating the line-of-sight airmasses of atmospheric spectra since the strongest lines are well placed in an atmospheric window, their absorption is relatively insensitive to temperature and is moderately strong (typical line center depths of 10 to 50% in high-resolution ground-based solar spectra and in lower stratospheric solar occultation spectra), and the volume mixing ratio of nitrogen is constant in the atmosphere and well known. However, a recent investigation has'shown the need to improve the accuracies of the N2 fine positions, intensities, air-broadened half-widths, and their temperature dependences to fully exploit this calibration capability (1). The present investigation addresses the problem of improving the accuracy of the N2 line positions.
Document ID
20000002892
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Rinsland, C. P.
(NASA Langley Research Center Hampton, VA United States)
Zander, R.
(Liege Univ. Belgium)
Goldman, A.
(Denver Univ. Denver, CO United States)
Murcray, F. J.
(Denver Univ. Denver, CO United States)
Murcray, D. G.
(Denver Univ. Denver, CO United States)
Grunson, M. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Farmer, C. B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Journal of Molecular Spectroscopy
Publisher: Academic Press, Inc.
Volume: 148
ISSN: 0022-2852
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NsG-1432
Distribution Limits
Public
Copyright
Other

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