MEASUREMENTS OF N2-INDUCED SHIFTS AND BROADENING COEFFICIENTS OF LINES IN CO FUNDAMENTAL FROM FOURIER-TRANSFORM SPECTRA

N2-induced shifts and broadening coefficients of some lines in the fun damental band of CO have been derived from Fourier transform spectra u sing a non-linear least-squares procedure for fitting the experimental line shapes. Channeling fringes have been avoided by using wedged bea m-splitter and mixer plates, and the remaining wavenumber-dependent ph ase error has been taken into account in the fitting procedure in orde r to derive accurate line positions. This method is discussed in detai l along with the uncertainties in the obtained line shifts.