Karl-Göran Karlsson speaks in this presentation of the CM SAF products about the inherent problems detecting clouds in satellite imagery. He explains the used approaches and algorithms and analyses the shortcomings of the used methods in twilight and cold winter situations. Then he comes to speak about cloud top determination. This task is more difficult than cloud detection and requires sophisticated methods depending on radiative transfer calculations. The last part of the presentation is dedicated to the analysis of cloud properties on the microscale. Here, the near infra-red channels offer possibilities to discriminate between ice and water phase. The CM SAF uses here methods developed by KNMI.
Filed under Keywords:
cloud detection, cloud top height, cloud microphysics