The Coordination Group for Meteorological Satellites (CGMS) is an international organization created in 1972[1][2] to coordinate the satellite systems that support global operational meteorology.

[3] CGMS came into being on 19 September 1972, when representatives of the European Space Research Organisation (since 1975 the European Space Agency), Japan, the United States of America, and observers from the World Meteorological Organisation (WMO) and the Joint Planning Staff for the Global Atmospheric Research Programme, met in Washington to discuss questions of compatibility among geostationary meteorological satellites.

Since the formation the mandate of CGMS has been extended to include Low Earth Orbit meteorological satellites and to cover other areas of operational space-based environmental monitoring as well as space weather observations from satellites.

[4] The objectives of CGMS are formally laid down in its charter[5] As of 2021 CGMS has as members 14 national and intergovernmental space agencies, as well as the World Meteorological Organisation and the Intergovernmental Oceanographic Commission:[6] CGMS coordinates the operational satellite systems of its members in an end-to-end fashion as required to facilitate and develop shared access to and use of satellite data and products in various application area, including operational meteorology.

[7] The HLPP is a rolling 5-year plan, revised annually by the CGMS plenary session.