Water vapor line parameters from 6450 to 9400 cm−1

The spectra of natural water vapor were recorded in the spectral range 6450–9400 cm−1 with a step-by-step Fourier transform spectrometer at room temperature with absorption path lengths up to 1200 m. Positions, intensities and self-broadening coefficients of about 11,000 lines were determined. This paper focuses on the intensity parameters: the lines of four isotopologues H216O, H218O, H217O and HD16O were observed and assigned; it presents a new experimental dataset in the 6450–9400 cm−1 spectral range. Obtained results were compared to the literature data. Fifty-nine new and corrected energy levels of H216O and H217O were determined from the vibration–rotation analysis of the observed lines. A brief discussion is added for self-broadening coefficients at the end of this paper. - Highlights: • New water vapor spectra recorded by FT Spectroscopy from 6450 to 9400 cm-1. • Retrieval of line parameters by multispectrum fitting procedure at room temperature. • Comparison of the line intensity measurements with data found in the literature. • Preliminary study of measured self-broadening coefficients