The experimental lines are from
(1) R. E. Hilliger and M. W. P. Strandberg,
1951, Phys. Rev. 83, 575.
Also included in the fit are far-infrared
transitions from
(2) C. Camy-Peyret, J.-M. Flaud, L. Lechuga-Fossat,
and J. W. C. Johns,
1985, J. Mol. Spectrosc. 109, 300.
A small number of FIR frequencies with large residuals
were omitted.
As usually, the FIR transition frequencies have not been
merged. The predictions should be reliable as long as
the uncertainties do not exceed 3 MHz;
transitions with predicted uncertainties larger
than 5 MHz should be viewed with great caution.
The dipole moment was assumed to agree with that of
HDS, see e035502.cat. The inertial axis rotation
of HD34S with respect to HDS is small.
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