Knowledge Bank

New wavenumber standards are measured by F.T.S. in vacuum. $N2O$ lines extend from about 1100 to $1350cm-1$. Their accuracy is of the order of 50 to 150 $106cm-1$. The water lines are obtained with a similar accuracy on a wider range. These data measured for the first time with a high information technique are located in a spectral area where experimental wavenumber references were up to now practically absent. They should be useful for accurate calibration of diode and Fourier spectra. An extensive work on CO covering a large domain of vibration and rotation quantum numbers in the fundamental electronic state $X1\Sigma$, is reported.