GEONETCast is a global, near–real-time, environmental data dissemination system in support of the Global Earth Observation System of Systems (GEOSS). The goal of the system is to enable enhanced dissemination, application, and exploitation of environmental data and products for the diverse societal benefits defined by the Group on Earth Observations (GEO), including agriculture, energy, health, climate, weather, disaster mitigation, biodiversity, water resources, and ecosystems. The system consists of three regional broadcasts: EUMETCast (operated by the European Organisation for the Exploitation of Meteorological Satellites [EUMETSAT], covering Europe, Africa, and parts of Asia and the Americas), CMACast (operated by the China Meteorological Administration [CMA], covering Asia and parts of the Pacific), and GEONETCast Americas (operated by the U.S. National Oceanic and Atmospheric Administration [NOAA], covering North, Central, and South America and the Caribbean). The GEONETCast system uses the Digital Video Broadcast-Satellite (DVB-S) or Digital Video Broadcasting–Satellite–Second Generation (DVB-S2) standard over commercial communications satellites and low-cost, off-the-shelf technology to widen the access of new user groups to Earth observation information.