High sensitivity spectroscopy of the O2 band at 1.27 µm: (II) Air-broadened line profile parameters

•Spectra of air-broadened O2 in the 1.27 µm band were measured by CRDS referenced to a frequency comb.•Line intensity and line-shape parameters were retrieved for 85 lines with the speed-dependent Nelkin-Ghatak profile.•Line-mixing effect was evidenced and measured for lines in the Q branch region.•The results reveal several differences with data from HITRAN and existing studies.•The retrieved high-order line-shape parameters are in good agreement with predictions from molecular dynamics simulations.