EUMETSAT holds the CGMS Secretariat since it joined the group in 1987. The CGMS Secretariat is responsible for organising the annual CGMS Plenary meeting with the support of a local host, which is a CGMS Member designated on a rotating basis. During the Plenary meeting, the CGMS plenary Working Groups also come together.

There are five CGMS Working Groups: WG I on satellite systems and operations; WG II on satellite data and products; WG III on operational continuity and contingency planning; WG IV on support for end users; and SWCG on space weather coordination.

Working groups

Working Group I: Satellite systems and operations

Working Group II: Satellite data and products

Working Group III: Operational continuity and contingency planning

Working Group IV: Data access and end user support

SWCG: Space weather coordination group


In addition, there are a few International Science Working Groups interacting with CGMS: The International TOVS Working Group - ITWG; the International Precipitation Working Group - IPWG; the International Winds Working Group - IWWG; the International Radio Occultation Working Group - IROWG and the International Clouds Working Group (ICWG). The last four Working Groups originate from CGMS WG II and plenary sessions.

International science working groups

International TOVS Working Group: ITWG

International Precipitation Working Group: IPWG

International Radio Occultation Working Group: IROWG

International Winds Working Group: IWWG

International Clouds Working Group: ICWG


Other relevant working groups or teams

CEOS-CGMS Joint Working Group on Climate


In addition, CGMS plenary sessions also result in actions for the creation of Task Forces or Task Teams (on e.g. Meta Data, socio economic benefits, etc.) which are of a less permanent nature.Between sessions of the annual CGMS Plenary meetings, the Secretariat is also in charge of facilitating the communication between CGMS Members and of ensuring that actions agreed during CGMS Plenary meetings are fulfilled.

Finally, the CGMS Secretariat represents CGMS Members in a number of International bodies such as the Committee on Earth Observation Satellites (CEOS) and its related Earth Observation International Coordination Working Group (EO-ICWG), Group on Earth Observation (GEO), and the Space Frequency Coordination Group (SFCG).