Intensities and atmospheric broadening coefficients measured for O_2 and H_2O absorption lines selected for DIAL monitoring of both temperature and humidity 1: O_2

Experimental Line Parameters of the Oxygen A Band at 760 nm

“…The most important of these are the line intensities. However, as seen in Table 1, the scatter among published bandstrength measurements for the A band of O 2 (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) is significantly larger than the 1% accuracies required for current monitoring technologies; in fact, Table 1 omits several studies that reported more divergent values (see Refs. 9 and 13 and the references therein).…”

“…Some values (generally absorption obtained through broadband integration of observed spectra) give an averaged total intensity of 2.13 ϫ 10 Ϫ22 cm Ϫ2 /(molecule ϫ cm Ϫ1 ), while other values (bandstrengths often reported from line-by-line analysis of high-resolution spectra) result in a mean value of 2.28 ϫ 10 Ϫ22 cm Ϫ2 /(molecule ϫ cm Ϫ1 ). Values far from these two groups (2)(3)(4)14) are viewed as spurious.…”

Molecular Constants for the v=0, b1Σg+ Excited State of O2: Improved Values Derived from Measurements of the Oxygen A-Band Using Intracavity Laser Spectroscopy

“…These are motivated by various applications. Intensity, pressure-broadening, and temperature dependence parameters are used in remote sensing of conditions in the earth's atmosphere and in the algorithm used in global ozone monitoring (e.g., 12,13). Line positions have been suggested as a convenient calibration standard for the visible region (9).…”

Low temperature cavity ring down spectroscopy with off-axis alignment: application to the A- and γ-bands of O2 in the visible at 90 K

“…Quantitative measurements of intensity have been made for individual rotational lines of the atmospheric oxygen b 1 + g (υ = 0,2) ← X 3 − g (υ = 0) or the A-and γ -bands by using different techniques such as: "White" multiple traversal absorption cells [38][39][40][47][48][49][50], intracavity laser-absorption spectroscopy (ICLAS) [37], and cavity ring down spectroscopy (CRDS) [18,51]. Previous measurements of the A-band absorption have been attempted to obtain experimental line parameters between 202 and 224 K. However, the temperatures had an uncertainty of 10 K, the actual spectra were not presented, and the temperature dependence of the pressure shift was not determined [50].…”