Geometric Accuracy Assessment of Msg-seviri Level 1.5 Imagery

The geometric accuracy of the images acquired by the SEVIRI (Spinning Enhanced Visible and InfraRed Imager) instrument aboard the European geostationary satellites Meteosat-8 (formerly MSG-1) and Meteosat-9 (formerly MSG-2) has been investigated in this study. Level 1.5 image data of the High-Resolution Visible (HRV) band with 1-km Ground Sample Distance (GSD) and several multispectral (MS) bands with 3-km GSD at sub-satellite point have been provided by the Swiss GCOS Office at MeteoSwiss. A set of fully automated processing methods has been adopted, developed and implemented for the evaluation of relative and absolute accuracy of the HRV images and band-to-band registration (BBR) accuracy between the HRV and 6 MS channels. Details of the relative and absolute accuracy evaluation methods and the results have been published in Aksakal (2013) and Aksakal et al. (2013) and briefly given in this paper. The methodology for the assessment of BBR accuracy and the results are provided first time here. SEVIRI images acquired in 2008 have been analyzed and relative and absolute shifts of up to 10 pixels have been observed in the images which were acquired from Meteosat-8. The BBR errors are found within the specifications given by EUMETSAT.