This guide is about the Cloud Phase RGB, which is new with the Flexible Combined Imager (FCI) of the Meteosat Third Generation (MTG) satellite system. The Cloud Phase RGB uses one of the new FCI channels.

The aim of this RGB is to provide improved microphysical information about the cloud tops. This is achieved by using two near-infrared microphysical channels together. The main characteristics of this RGB are demonstrated using proxy data from Japanese and American satellites.

A short quick guide to the Cloud Phase RGB is available on the EUMeTrain webpage. The present document is an extended guide discussing its characteristics in detail. It provides detailed information, with many examples, on areas of application, the physical background, the recipe used to create the RGB, typical colours, interpretation, benefits and limitations, comparison with other products and exercises.