EUMETCast Terrestrial Service
The dissemination of multicast data through terrestrial networks – instead of uplinking to satellites - currently relies on the infrastructure provided by GÉANT and providers of national research networks (NRENs) globally, GÉANT network in Europe and the global connectivity of GÉANT to other continents. The worldwide connectivity offers the possibility to an extensive geographical reach of the EUMETCast terrestrial service. The overall principle for EUMETCast Terrestrial is to have a single data source where files are encoded into a multicast stream and then transported to the user via a multicast-enabled dedicated network based on Source-Specific Multicast (SSM) service model.
The terrestrial service will re-use components familiar to users of the EUMETCast satellite service and then, as for EUMETCast satellite, subscribes to the related multicast channels to receive the data (figure 7a).
More detailed information can be found via the links below;
Figure 7a: EUMETCast NREN GÉANT data flow
Figure 7b: GÉANT Global connectivity
Figure 7c: The European Network connectivity of GÉANT 1
Credit GÉANT for images, full resolution network maps are available at https://www.geant.org/Resources#maps