Knowledge Bank

About 150 values of nitrogen-shifting coefficients of the water molecule have been measured at 300 K. for vibro-rotational lines absorbing between 5000 and $10700cm-1$. At the present time, the preliminary results show that, except for a few lines, the measured $N2$- shifting coefficients are negative: they range between 0 and $-0.022cm-1.atm-1$, with a mean value of $-0.007cm-1.atm-1$. The estimated uncertainties are ranging from 0.0002 to $0.003cm-1-atm-1$ according to the quality of the line.