\\ Species Tag: & 65001 & Name:& S-33-O2 \\ Version: & 1 & &Sulfur dioxide \\ Date: & Nov. 1996 & & $^{33}$S isotope \\ Contributor:& H. S. P. M\"uller & & \\ & & & \\ Lines Listed: & 19048 & Q(300.0)=& 23881.212 \\ Freq. (GHz) $<$ & 3451 & Q(225.0)=& 15501.797 \\ Max. J: & 78 & Q(150.0)=& 8433.669 \\ LOGSTR0= & -8.0 & Q(75.00)=& 2982.020 \\ LOGSTR1= & -6.5 & Q(37.50)=& 1055.834 \\ Isotope Corr.: & -2.125 & Q(18.75)=& 374.621 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 133.439 \\ $\mu_a$ = & & A=& 59856.482 \\ $\mu_b$ = & 1.6331 & B=& 10318.296 \\ $\mu_c$ = & & C=& 8780.138 \headend These measurements are based on fits to the data from (1) the compilations of F. J. Lovas, 1978, J. Phys. Chem. Ref. Data {\bf 7}, 1445, and 1985, J. Phys. Chem. Ref. Data {\bf 14}, 395; and from (2) E. Klisch, P. Schilke, S. P. Belov, and G. Winnewisser, 1996, J. Mol. Spect. {\bf 186,} 314. Some higher distortion constants have been fixed to values of the $^{32}$SO$_2$ isotopomer or an average of the $^{32}$SO$_2$ and $^{34}$SO$_2$ isotopomers. Predictions for high $J$ ($>\ ca.$ 60) or $K_a$ ($>\ ca.$ 15) quantum numbers should be taken with care. Because sizable $^{33}$S quadrupole splittings have been observed for moderately high values of $J$ and $K_a$ the predictions contain these hyperfine splittings for all transitions. The dipole moment is assumed to be the same as for the $^{32}$S isotope.