The main objective of SI2N is to assess and extend the current knowledge and understanding of measurements of the vertical distribution of ozone, with the aim of providing input to the next WMO Scientific Assessment of Ozone Depletion anticipated for 2014. IMK contributes with the thorough assessment of drifts and trends in the MIPAS ozone data record, and a comprehensive intercomparison of ozone records from satellites of the last decade.