Atmospheric ozone is of interest not just because of the danger of ozone depletion inrnstratosphere but also because of its basic role in tropospheric chemistry and oxidationrnreactions, in controlling the temperature structure of atmosphere through absorptionrnin the solar and terrestrial infrared radiation and air pollution along with variousrngases. The distribution of ozone in troposphere is resulted mainly from the interactionrnof various atmospheric gases, transport and chemistry and radiation processes.rnA full description of photochemistry ozone would be very complicated since hundredsrnof chemical species and reactions, many of which are interlinked, have to be included.rnIn view of these facts, tropospheric ozone over tropics is retrieved from solar spectralrnradiance measurements by Fourier Transform Infrared Spectrometer (FTIR) onboardrnGerman Polar and Marine Research Vessel (Polarstern) during the 1996 expedition.rn1-D steady state chemistry model is also used to determine tropospheric ozone overrntropics. The retrieved tropospheric ozone distribution agrees with existing understandingrnthat ozone is produced over tropics and transported to higher latitudes byrngeneral atmospheric circulation. The 1-D steady state chemistry model prediction isrnable to capture the main features of the retrieved ozone profile at altitude below 6rnkm. However, discrepancy between 1-D model and measurement above this altitudernmight be an indication of inadequacy of 1-D chemistry model