Knowledge Bank

Air-broadened half-widths and pressure-induced frequency shifts of water vapor were derived from laboratory measurements using the McMath-Pierce Fourier transform spectrometer located at Kitt Peak. The observations were obtained at gas sample temperatures ranging from $\sim 241$ K to $\sim 388$ K for rotational transitions in the (000)-(000), (010)-(000), and (020)-(010) bands of water. Width and shift coefficients were determined for $\sim 500$ lines, and the temperature dependence of these coefficients was determined for most of the transitions $measured.a$