Clear Sky Radiances - MSG - 0 degree (CF-015 Release 1)

This is the first release of the reprocessed SEVIRI Clear-Sky Radiances (CSR) product. The CSR product is a subset of the information derived during the Scenes Analysis processing. The product provides the brightness temperature for a subset of the MSG channels averaged over all pixels within a processing segment (16x16 pixels) which have been identified as clear (a minimum of 7 clear pixels are needed to compute the average). For the channel WV6.2 the CSR is also derived for areas containing low-level clouds. The CSR product also contains the fraction of clear sky and the solar zenith angle. The final CSR product is BUFR encoded 3-hourly at every third quarter of the hour (e.g. 00:45, 01:45 ...). Note that the reprocessing was done using the latest version of the EUMETSAT software (Version 1.5.3, 2013) ingesting original level 1.5 SEVIRI images and the ECMWF ERA-interim as a as a forecast input re-analysis data.