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Measurements of Lorentz air-broadening coefficients and relative intensities in the H216O pure rotational and ν2 bands from long horizontal path atmospheric spectra

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Abstract

Lorentz air-broadening coefficients and relative intensities have been measured for forty-three lines in the pure rotational band and twenty lines in the ν2 band of H216O between 800 and 1150 cm−1. The results were derived from analysis of nine 0.017-cm−1 resolution atmospheric absorption spectra recorded over horizontal paths of 0.5–1.5 km with the McMath Fourier transform spectrometer and main solar telescope operated on Kitt Peak by the National Solar Observatory. A nonlinear least-squares spectral fitting technique was used in the spectral analysis. The results are compared with previous measurements and calculations. In most cases, the measured pressure-broadening coefficients and intensities are significantly different from the values in the 1986 HITRAN line parameters compilation.

© 1991 Optical Society of America

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