MEASUREMENTS OF NITROGEN-SHIFTING COEFFICIENTS OF WATER-VAPOR LINES BETWEEN 5000 AND 10700 CM(-1)

More than 180 nitrogen-shifting coefficients have been measured at 300 K, for vibro-rotational lines of the water molecule absorbing between 5000 and 10 700 cm-1. The average uncertainty is 0.4 x 10(-3) cm-1 atm-1 (1 atm = 1013 hPa); most of the measured N2-shifting coefficients are negative, they vary between +5 and -27 x 10(-3) cm-1 atm-1. A review of the existing measurements and calculations concerning the pressure-shifts of H2O lines is presented, and the measurement methodology is discussed.