Experimental Line Parameters of the Oxygen A Band at 760 nm

To support atmospheric remote sensing applications, line positions, intensities, self- and nitrogen-broadened linewidths and their temperature dependences and pressure-induced shifts in line positions at room temperature were measured up to J' and N' = 22 for the oxygen A band at 13 122 cm(-1). Line intensities were obtained with 1% precisions and 2% absolute accuracies using absorption spectra recorded at Doppler-limited (0.02 cm(-1)) resolution with the McMath Fourier transform spectrometer (FTS) located at Kitt Peak National Observatory/National Solar Observatory in Arizona. The oxygen line positions were calibrated using near-infrared transitions of the 2-0 and 3-0 bands of CO as secondary standards. The intensities and positions of seven H(2)O lines near 13 900 cm(-1) were also remeasured to validate the FTS performance. The O(2) intensities fell within 1% of the values currently assumed for the molecular databases, but it was found that broadening coefficients and line positions should be revised for the A band of molecular oxygen. Copyright 2000 Academic Press.