The GEO Plenary is the main body of designated representatives of the Members and Participating Organizations of the Group on Earth Observations (GEO). It is the GEO’s primary decision-making body. The GEO Plenary meets at least once annually.
The GEO was formally established at the Third Earth Observation Summit in February 2005 to carry out the GEOSS 10-Year Implementation Plan. Prior to its formal establishment, the Ad Hoc GEO (established at the First Earth Observation Summit in July 2003) met as a planning body to develop the 10-Year Plan.