SP-582 Second MSG RAO Workshop

ABSTRACT In this study, five of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) channels are inter-calibrated with similar channels on MODerate resolution Imaging Spectroradiometer (MODIS) and Geostationary Operational Environmental Satellite (GOES)-12/ Visible Infrared Scanner (VIRS). A ray-matching technique combines pairs of pixel sets from each satellite at almost the same times from nearly the same angles. The MODIS and VIRS derived SEVIRI 0.635 and 0.810µm gains indicate to have increased since launch. Monthly gains computed from April to August of 2004 establish that the SEVIRI visible channels are quite stable during this time period. The SEVIRI 3.9µm temperature is colder than the corresponding MODIS and GOES-12 temperatures. However the SEVIRI 11.7µm temperatures are warmer. 1