Nera Inmarsat-c, Service Manual, Page: 122 / 228

AP1-1
AP1.1 System Overview
AP1.1.1 System Configration
Fig. AP1.1.1 shows the configration of the Inmarsat system.
Fig. AP1.1.1 Configration of Inmarsat system
Table AP1.1.1 Bodies and Roles
Body Role
Operation Control Center (OCC)
It is located at Inmarsat’s London headquaters
and controls the system for 24 hours.
Satellite Control Center (SCC)
It is responsible for operating the satellites
owned by the Inmarsat.
Network Coordination Center (NCS)
Each ocean region has its NCS which monitors
and controls communications traffic between the
LES and the satellite.
Land Earth Station (LES)
It acts as an interface between the MES and the
terrestrial telecommuniations network via the
satellite.
Mobile Earth Station (MES) It is the ship installed the Inmarsat .
Appendix 1) Inmarsat system
OCC
NCS
SCC
LES LES LES
Same as left
Satellite
MES
Same as left
Same as left
AOR-W
Atlantic Ocean Region-West
AOR-E
Atlantic Ocean
Region-East
IOR
Indian Ocean
Region
POR
Pacific Ocean
Region