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A comprehensive error characterization of SCIAMACHY (Scanning  Imaging Absorption Spectrometer for Atmospheric CHartographY) limb  ozone profiles has been established based upon SCIATRAN transfer  model simulations. The study was carried out in order to evaluate  the possible impact of parameter uncertainties, e.g. in albedo,  stratospheric aerosol optical extinction, temperature, pressure,  pointing, and ozone absorption cross section on the limb ozone  retrieval. Together with the a posteriori covariance matrix  available from the retrieval, total random and systematic errors are  defined for SCIAMACHY ozone profiles. Main error sources are the  pointing errors, errors in the knowledge of stratospheric aerosol  parameters, and cloud interference. Systematic errors are of the  order of 7%, while the random error amounts to 10–15% for most  of the stratosphere. These numbers  can be used for the interpretation of instrument intercomparison and  validation of the SCIAMACHY V 2.5 limb ozone profiles in a rigorous  manner

Error budget analysis of SCIAMACHY limb ozone profile retrievals using the SCIATRAN model