Figure 1-1 Simplified Aeronautical Satellite Communications System - EMS eNfusion 1252-A-4100-01 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-X and HSD-Xi High-speed Data Terminal

Figure 1-1 Simplified Aeronautical Satellite Communications System

Satellite communication systems provide users with long-range voice and data communication
by accessing global satellite and ground communications networks.
Inmarsat is an international organization that operates and maintains multiple geostationary
satellites and satellite networks. The satellites that provide Swift64 services are called I-3
satellites. Each satellite is located over an Ocean Region (OR); the current OR names are:
• Atlantic Ocean Region-East (AOR-E)
• Atlantic Ocean Region-West (AOR-W)
• Indian Ocean Region (IOR)
• Pacific Ocean Region (POR)
These satellites provide worldwide telecommunication services for aviation, shipping, and
land-mobile terminal users. The satellites connect to ground telecommunication systems
through the LES/GES.
The satellites that provide SBB services are called I-4 satellites. At the time of publishing,
three I-4 satellites provide SBB services: Americas (98W), EMEA (25E) and Asia-Pacific
(143.5E).
The HSD-Xi terminal extends the communication functions provided by other HSD terminals.
It does not communicate with the satellite network on its own. It must be installed with a HSD
to communicate with the satellite network.
23-15-30
1-2
8 MAY 09