Validation of IFE-1.6 SCIAMACHY limb ozone profiles A. J. Segers1, C. von Savigny2, E. J. Brinksma1, and A. J. M. Piters1 1Royal Dutch Meteorological Institute (KNMI), P.O. Box 201, 3730 AE De Bilt, The Netherlands 2Institute of Environmental Physics and Remote Sensing (IUP/IFE), University of Bremen, Germany
Abstract. The IFE-1.6 scientific data set of SCIAMACHY limb ozone profiles is
validated for the period August–December 2002.
The data set provides ozone profiles over an altitude range of 15–45 km.
The main uncertainty in the profiles is the imprecise knowledge
of the pointing of the instrument, leading to retrieved
profiles that are shifted in altitude direction.
To obtain a first order correction for the pointing error and the remaining
uncertainties, the retrieved profiles are compared to their a-priori value
and ozone sondes based on absolute distance and equivalent
A vertical shift of the satellite profiles with 2 km downward
is found to be an appropriate correction for the data set studied.
A total root-mean-square difference between limb profiles and
sondes of 10–15% remains for the stratospheric ozone profile
after application of the correction.
Small biases are left above and below the ozone maximum at mid latitudes,
where the vertical gradients in the retrieved product are in general too strong.
Citation: Segers, A. J., von Savigny, C., Brinksma, E. J., and Piters, A. J. M.: Validation of IFE-1.6 SCIAMACHY limb ozone profiles, Atmos. Chem. Phys., 5, 3045-3052, doi:10.5194/acp-5-3045-2005, 2005.