Recommended Isolated-Line Profile for Representing High-Resolution Spectroscopic Transitions

Line shapes, positions and intensities of water transitions near 1.28μm

“…This work is consistent with the recent study of Tran et al [43] in which mechanisms of collisional narrowing, speed-dependent effects and partial correlation between velocity-changing and dephasing collisions were found to contribute to water line shapes. Finally, the high quality-of-fit for our pCqSDNGP fits supports proposals that the pCqSDHCP (which is equivalent to the pCqSDNGP) be adopted as a next-generation, standardized profile to go beyond the VP [24,47].…”

“…This line profile recently was recommended by the IUPAC task group on "Intensities and line shapes in high-resolution spectra of water isotopologues from experiment and theory" (Project no. 2011-022-2-100) as a generalized alternative to the Voigt profile for use in spectroscopic databases because it captures the physical complexity of real line profiles without introducing undue computational burden [47]. For simplicity, the authors of this study suggested that the pCqSDHCP be called the HartmannTran profile.…”

A review of sources of systematic errors and uncertainties in observations and simulations at 183 GHz

“…The current edition of HITRAN provides the parameters for Voigt profiles, but future editions of the database will allow for inclusion of additional parameters for more sophisticated line shape models (Tennyson et al, 2014). Sensitivity tests on Voigt parameters, performed using MonoRTM, have shown that illustrative uncertainties on the foreign (±3 %) and self-broadened (±15 %) half widths, on the temperature exponent (maximum of 15 %) and the pressure shift (maximum of 20 %) are certainly too small to explain the observed bias (Payne et al, 2008), and the spectroscopic community (lab and modellers) believes that the accuracy of these parameters is higher than the above numbers.…”

Frequency-agile, rapid scanning cavity ring-down spectroscopy (FARS-CRDS) measurements of the (30012)←(00001) near-infrared carbon dioxide band

“…As a result, here we use the partially correlated, quadratic-speed-dependent Nelkin-Ghatak line profile (pCqSDNGP) [6] with line mixing. This profile is equivalent to the Hartmann-Tran profile which has been recently recommended by the IUPAC Task Group [7] and which will be soon incorporated into the HITRAN database [8].…”