“…The variation of saturnian airmass and gravity for each observed latitude was included in the calculation. Line positions, intensities and energies for NH 3 , CH 3 D, 12 C 2 H 2 , 12 C 13 CH 2 , 12 C 2 H 6 and 12 C 13 CH 6 were taken from the GEISA databank (Jacquinet-Husson et al, 1999), and those for 12 CH 4 and 13 CH 4 come from the TDS spectroscopic databank (Tyuterev et al, 1994). H 2 and He mole fractions were 0.877 and 0.118, respectively (Conrath and Gautier, 2000).…”