We report here an analytical fit of the transition dipole moments between (X) over tilde (1)A(1) and (C) over tilde B-1(2) electronic states of SO2 calculated using a high level ab initio method. The absorption spectrum as well as the resonance emission spectra from several low-lying (C) over tilde B-1(2) vibrational levels are calculated using a newly developed ab initio potential energy surface (PES) and the transition dipole functions. The calculated spectra are in semi-quantitative agreement with available experimental data. A strong non-Condon effect is found for the emission spectra.