Fourier transform spectra of ozone have been recorded in the 3.6-μm region at a resolution of 0.01 cm-1. A detailed analysis of the three bands ν2 + 2ν3, ν1 + ν2 + ν3, and 2ν1 + ν2 has led to an extensive and precise set of experimental rotational energy levels for the triad of interacting vibrational states (012), (111), (210). Taking into account explicitly the Coriolis-type interactions between the rotational levels of (012) and (111) and (210) as well as the Darling-Dennison interaction between the levels of (012) and (210), it was possible to reproduce very satisfactorily all of the experimental energy levels. A precise set of vibrational energies, rotational and coupling constants was obtained. In particular, the following band centers were derived: v0(012)=2726.1066 cm-1, v0(111)=2785.2391 cm-1, v0(210)=2886.1781 cm-1. Moreover, 190 line intensities were measured from which precise transition moment constants for the three bands were determined. A complete list of line positions, intensities, and lower state energy levels has been generated for the ν2 + 2ν3, ν1 + ν2 + ν3 and 2ν1 + ν2 bands of 16O3. © 1990.