The rotational spectrum of the SH+ radical in its X3Σ− state

All the available data on the rotational energy levels of the SH+ (sulfoniumylidene) radical in the v = 0 and 1 levels of the X3Σ− ground state have been subjected to a single, weighted least-squares fit to determine an improved set of molecular parameters for this molecule. The results have been used to calculate the rotational spectrum of the SH+ radical in the v = 0 and 1 levels up to the N = 4-3 transition.