49
NWC Voyager
EQUATO
R
EARTH
12000 km
35700 km
Pacific Ocean Region
Indian Ocean Region
54°W
64.5°E
178°E
15.5°W
Atlantic Ocean Region (West)
Atlantic Ocean Region (East)
System satellites
The satellites are positioned in a geostationary orbit
above the equator at approximately 35700 km
altitude.
See figure.
In geostationary orbit, each satellite moves at the
same rate as the earth, and so remains in the same
relative position to the earth.
The satellites provide 99% landmass coverage.
NWC Voyager can communicate via the four satellite
Ocean Regions:
AOR-W
Atlantic Ocean West Region
AOR-E
Atlantic Ocean East Region
IOR
Indian Ocean Region
POR
Pacific Ocean Region
For coverage area of the satellites for NWC Voyager,
.
Transmission frequencies
The Inmarsat terminals operate in the following
frequency bands:
MES
transmission
frequencies:
1626.5 MHz - 1646.5 MHz
MES
receiving
frequencies:
1530.0 MHz - 1559.0 MHz
A large number of channels are available (20 kHz
channel separation), offering 4.8 or 64 kbps voice
communication, as well as 3.1 kHz audio or 64 kbps
data communication.
Duplex communication uses two channel frequen-
cies, one in each direction.
The LESs provide interface to the international
networks for telephony and data: PSTN (Public
Switched Telephone Networks) and PSDN (Packet
Switched Data Networks).
Satellite positions.
Summary of Contents for NWC Voyager
Page 1: ...NWC Voyager User Guide Back to Start Page...
Page 2: ......
Page 4: ......
Page 57: ......
