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Validation of OMI total ozone using ground-based Brewer observations

Dimitris Balis(1), Ellen Brinksma(2), Mark Kroon(3) and Christos Zerefos(4)

(1) Aristotle University of Thessaloniki, Campus Box 149, 54124 Thessaloniki, Greece
(2) Royal Netherlands Meteorological Institute, Wilhelminalaan 10, De Bilt, NL-3730 AE De Bilt, Netherlands
(3) Royal Netherlands Meteorological Institute, Wilhelminalaan 10, De Bilt , NL-3730 AE De Bilt, Netherlands
(4) National Observatory of Athens, P.O. BOX 20048 - Thissio , 11810 - Athens, Greece


Near-to-real time as well as “archive quality” Brewer total ozone observations, which are performed with well maintained and calibrated instruments over the Northern Hemisphere have been used for the validation of the total ozone column product of the Ozone Monitoring Instrument (OMI) aboard the NASA EOS-Aura satellite. During the commissioning phase of OMI, the near-to-real time ground-based data, which are submitted to the WMO Northern Hemisphere Ozone Mapping Centre within few hours after observation, have been employed to check the behaviour of the OMI instrument as a function of measuring geometry. In addition the near-to-real time ground based data are also used as an early warning tool for the detection of possible problems during the operation of OMI. Archived ground-based data have been used to validate more than one year of OMI-TOMS and OMI-DOAS total ozone measurements. The comparisons show an agreement of better than 1% for the OMI-TOMS measurements and better than 2% for OMI-DOAS. Finally the validation results are compared with the respective GOME 4.0 and TOMS v8


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Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry