Detection and analysis of four new bands in CRDS 16O3 spectra between 7300 and 7600 cm−1

► CW-Cavity Ring Down Spectra of ozone 16O3 recorded in 7300-7600 cm−1 range. ► Four new bands assigned: 6ν1 + ν3, 3ν1 + 5ν2 + ν3, 2ν1 + 4ν2 + 3ν3 and 5ν1 + 2ν2 + ν3. ► Resonance vibration-rotation perturbations due to 6 dark states observed. ► Effective Hamiltonian models built using global predictions from PES. ► 723 transitions modelled with rms 0.005-0.014 cm−1 in the range ∼90% of dissociation.