The measured transition frequencies were taken from the compilations of
(1) F. J. Lovas 1978, J. Phys. Chem. Ref. Data 7, 1445, and 1985, J. Phys. Chem. Ref. Data 14, 395; from
(2) E. Klisch, P. Schilke, S. P. Belov, and G. Winnewisser 1996, J. Mol. Spectrosc. 186, 314; and from
(3) H. S. P. Müller, J. Farhoomand, E. A. Cohen, B. Brupbacher-Gatehouse, M. Schäfer, A. Bauder, and G. Winnewisser, 2000, J. Mol. Spectrosc. 201, 1.
Some higher distortion constants have been fixed to values of the ³²SO₂ isotopomer.
Predictions for high J (> ca. 60) or K_a (> ca. 15) quantum numbers should be taken with care. Because sizable ³³S 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 ³²S isotope.