The GTS is used to receive, send and relay weather data and products. The RMDCN provides a computer network infrastructure for the meteorological community in certain regions.

Structure of the Global Telecommunication System. Source: WMO

The Global Telecommunications System (GTS) was established by the World Meteorological Organization and is used by National Meteorological Services (NMS) throughout the world.

The Regional Meteorological Data Communication Network (RMDCN) is used by the meteorological community in WMO Region RA-VI (Europe) and RA-II (Asia and the South-West Pacific).

Global Telecommunication System

WMO's Global Telecommunication System is the communications and data management component, that allows the World Weather Watch (WWW) to operate through the collection and distribution of information critical to its processes.

The system is implemented and operated by National Meteorological Services, of WMO Members, and international organisations, such as ECMWF and EUMETSAT. This secured communication network enables real-time exchange of information, critical for forecasting and warnings of hydrometeorological hazards, in accordance with approved procedures.

Regional Meteorological Data Communication Network

The RMDCN network is based on the Multiprotocol Label Switching (MPLS) backbone infrastructure of Orange Business Services (OBS), a merger of Orange, Equant and France Telecom.

This technology allows OBS to implement an IP Virtual Private Network (IPVPN) for the RMDCN community. The main characteristics of the new network include any-to-any connectivity between RMDCN members; load balancing for mission critical sites, and multiple resilience options — depending on user requirements.

The ECMWF website has more information.

EUMETSAT services via GTS and RMDCN


EUMETSAT and its partners use the GTS/RMDCN to deliver the following services:

Metop/NOAA Global Level 1 products and Regional EARS products

Jason-3 Operational Geophysical Data Record (OGDR) products

Meteorological and Environmental products from the EUMETSAT Ground Segment

Meteosat Data Collection Services DCP bulletins.

For further information please contact our User Service Helpdesk.

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