At a national level, the Clear Air will focus on earth observation activities that provide a direct value to the society and economy of the Netherlands and are not supported in international programmes of e.g. ESA, EUMETSAT and the EU. At an international level Clear Air is already working in and contributing to programs of the EU, ESA, EUMETSAT and other agencies and collaborates with atmospheric expert centres worldwide like NASA-GISS and NCAR in the USA.