The resolution and the frequency accuracy of a spectrum and the abundance of an absorbing gas can be obtained by ratioing observed and calculated spectra. Line positions (to ±0.002 cm-1), spectral resolution (0.075 ± 0.003 cm-1), and a CO abundance [(2.35 ± 0.23) × 10-2atm-cm (STP)] have been found by comparing an observed CO spectrum with a spectrum calculated from the AFCRL line parameter listing.
Y. S. Chang, J. H. Shaw, W. M. Uselman, and J. G. Calvert, "Use of the AFCRL line parameters compilation to test the performance of an infrared spectrometer system," Appl. Opt. 16, 2116-2118 (1977)