The activity of H SAF during CDOP-4 will be performed to provide satellite products and user services in support to Operational Hydrology, Meteorology, Risk Management and Water Management by bridging science and research into development and operations. New products for the estimation of precipitation, soil moisture, and snow parameters will be primarily based on Meteosat Third Generation (MTG) and EUMETSAT Polar System - Second Generation (EPS-SG) missions, pursuing and complying the related EUMETSAT strategy, and improving the H SAF scientific framework. The products will be verified through an independent quality assessment and hydro validation impact studies, and delivered to the users. During CDOP-4 special efforts will be dedicated to provide open source tools and facilities to foster and strengthen the use of H SAF products for hydrological applications, to actively collaborate with international projects and programs, operating in the field of hydrology and meteorology, and to develop specialized training programs for the needs of different user communities.