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| Coordination Group for Meteorological Satellites | |
|---|---|
| Name | Coordination Group for Meteorological Satellites |
| Abbrev | CGMS |
| Formation | 1972 |
| Type | Interagency coordination group |
| Purpose | Satellite coordination for meteorology and climate |
| Headquarters | Geneva |
| Region served | Global |
| Membership | National and international space and meteorological agencies |
Coordination Group for Meteorological Satellites is an international forum that brings together national and international space and meteorological agencies to coordinate geostationary and polar-orbiting meteorological satellite systems. Founded in the early 1970s, the group provides technical guidance, operational standards, and mechanisms for data sharing among agencies from regions represented by organizations such as World Meteorological Organization, European Space Agency, and National Aeronautics and Space Administration. Its work influences operational centers, research institutes, and commercial entities including EUMETSAT, Japan Meteorological Agency, NOAA, China National Space Administration, and Indian Space Research Organisation.
The genesis of the Coordination Group for Meteorological Satellites traces to the era of collaborative space programs in the 1960s and 1970s when agencies involved in NOAA programs, NASA missions, and European Space Research Organisation successors recognized the need for interoperability between geostationary systems such as GOES and polar systems such as TIROS. Early meetings involved representatives from WMO, COSPAR, ECMWF, and national services including Met Office (United Kingdom), Météo-France, and Deutscher Wetterdienst. Over successive decades CGMS addressed interoperability during major events like the expansion of EUMETSAT in the 1990s, the launch campaigns of Meteosat series, Himawari satellites, and the modernization efforts tied to JPSS and METOP programs.
CGMS is composed of representatives from member agencies including state actors and multinational organizations: NOAA, NASA, ESA, EUMETSAT, JAXA, CNSA, ISRO, ROSCOSMOS, Australian Bureau of Meteorology, and regional bodies represented at WMO congresses. Observers and contributors include entities such as CGIAR-affiliated climate institutes, IPCC-linked research centers, and commercial satellite operators. Governance is exercised through plenary sessions, technical working groups, and secretariat support provided by partnering institutions in coordination with WMO and regional meteorological services.
CGMS aims to harmonize satellite missions to optimize global coverage, minimize observational gaps, and promote standards for instrument calibration and product quality. Activities include preparation of technical guidance documents, coordination of satellite launches and orbital slots affecting International Telecommunication Union considerations, and advisory roles for disaster response coordination involving United Nations Office for the Coordination of Humanitarian Affairs and regional emergency agencies. CGMS also engages with research initiatives led by NASA centers, NOAA laboratories, and university groups at MIT, University of Reading, and Colorado State University.
A core CGMS remit is to develop technical standards for radiometric calibration, spectral response, and geolocation used by instruments such as imagers, sounders, and microwave radiometers aboard platforms like Meteosat, Himawari, GOES-R Series, MetOp, and Suomi NPP. CGMS working groups coordinate intercalibration campaigns linking facilities at National Institute of Standards and Technology, solar calibration initiatives at NOAA National Centers for Environmental Information, and validation exercises with oceanographic programs like NOAA National Ocean Service and IOC of UNESCO partners. Standards endorsed by CGMS inform procurement and mission design at agencies including ISRO and CNSA.
CGMS promotes principles and mechanisms for timely exchange of satellite data, products, and services among member agencies and operational centers such as ECMWF, National Weather Service, Japan Meteorological Agency, and regional forecasting centers. Data policies coordinated through CGMS intersect with initiatives like Global Earth Observation System of Systems and involve agreements on dissemination via ground stations, data portals run by EUMETSAT and NOAA CLASS, and emergency data streams used by UNICEF and International Federation of Red Cross and Red Crescent Societies in crises. Emphasis is placed on operational continuity, licensing, and open-data best practices consistent with WMO resolutions.
CGMS supports capacity building by coordinating training workshops, fellowships, and satellite data utilization courses for national meteorological services and universities such as University of Nairobi, National University of Singapore, and Pontifical Catholic University of Chile. Partnerships with WMO training centers, EUMETSAT User Services, and JAXA outreach programs facilitate knowledge transfer on satellite meteorology, radiative transfer modeling used at ECMWF, and remote sensing applications in agriculture supported by FAO. Capacity efforts target developing-members to improve climate monitoring, nowcasting, and early warning systems.
Major CGMS initiatives include intercalibration campaigns for imagers and sounders, coordinated responses to launch failures and anomaly mitigation involving Arianespace and launch providers, and support for constellations aligning with Group on Earth Observations priorities. CGMS has contributed to harmonizing data streams for global programs such as Global Precipitation Measurement and supported sensor complementarity for missions including Jason altimetry and GRACE gravity recovery through liaison with mission teams at JPL and CNES.
CGMS has substantially improved operational weather forecasting, climate monitoring, and disaster response by enabling interoperable satellite systems used by ECMWF, national services, and humanitarian agencies. Challenges remain in addressing spectrum allocation disputes at ITU meetings, ensuring sustainability amid budgetary pressures at agencies like NOAA and ESA, integrating commercial remote sensing providers, and maintaining long-term calibration traceability with institutions such as NIST and academic labs. Ongoing geopolitical shifts involving members such as CNSA and ROSCOSMOS also influence cooperative mechanisms and data-access arrangements.
Category:Meteorological organizations Category:Satellite meteorology