Broadening and shifting of the 321-, 325- and 380-GHz lines of water vapor by pressure of atmospheric gases

Continuum and magnetic dipole absorption of the water vapor—oxygen mixtures from 0.3 to 3.6THz

“…Based on analysis of available data, we have chosen the O 2 /air broadening ratio of 0.61. This value is close to some recent microwave data [31] and, as found below, provides the best match with the theoretically predicted continuum parameters. By using this ratio, any remaining differences in the temperature dependence of the linewidth between oxygen and air may increase the experimental uncertainty associated with our continuum measurements.…”

The HITRAN2012 molecular spectroscopic database

“…These new parameters have been tested for different remote-sensing applications and were found to give improved profiles for atmospheric constituents. The algorithm has been improved for the current release of HITRAN: additional measurements of γ air and δ [18,[33][34][35][36][37][38][39] and γ self [18,[38][39][40][41][42][43][44][45] have been added to the measurement databases. Additional data [46,47] have been added to the theoretical database of γ air , n, and δ.…”

Accurate broadband rotational BWO-based spectroscopy

“…Similar tests were also successfully carried out for the parameters of the water vapor spectral lines (see, for example, the 183-GHz line in [29] and the 325-GHz line in [33]), which are important for applications. In both cases, low-pressure and atmospheric-pressure measurements of the pressure broadening and shifting parameters measured by the fundamentally different spectrometers coincided within experimental uncertainties.…”