Furuno INMARSAT-C FELCOM 18 Operator's Manual page 14

1. INMARSAT C SYSTEM OVERVIEW
NCS
LES
0.0 m
-/+: To set option
AOR-West
OCC: Operation Control Center
SCC: Satellite Control Center
NCS: Network Coordination Station
MES: Mobile Earth Station
LES: Land Earth Station
The Inmarsat C system consists of the Operation Control Center (OCC), Satellite Con-
trol Centers (SCC), Network Coordination Stations (NCS), Land Earth Stations (LES)
and Mobile Earth Stations (MES). The OCC, located at Inmarsat's London headquar-
ters, coordinates a wide range of activities in the Inmarsat system, including commis-
sioning of mobile earth stations.
The Inmarsat C system divides the world into four regions and each region is covered
by its own satellite.
Region
AOR-West
AOR-East
IOR
POR
In each region there is one NCS and several LESs. The NCS keeps track of all Inmar-
sat C transceivers in its region and broadcasts information such as navigational warn-
ings, weather reports and news. The LESs provide the link between the MES and the
terrestrial telecommunications networks via satellite.
1-2
OCC
SCC
LES
LES
Satellite
MES
0.0 m 0.0 m
-/+: To set option -/+: To set option
Inmarsat-C system configuration
Inmarsat system satellites
I-4 F3 AMER
I-3 F5 AORE
I-4 Alphasat EMEA
I-4 F1 APAC
Same as left Same as left
AOR-East IOR
Satellite Satellite position
Same as left
POR
98.4°W
54.0°W
25.0°E
143.5°E