Acronyms AATSR Advanced Along-Track Scanning Radiometer ATBD Algorithm Theoretical Basis Document AVHRR Advanced Very High Resolution Radiometer CMa Cloud Mask DA Dual-Algorithm ECMWF European Centre for Medium-Range Weather Forecasts Eumetcast EUMETSAT / National Oceanic and Atmospheric Administration / EUMETSAT European Organisation for the Exploitation / LST Issue I1.10 Organization / /