Nera NWC Voyager User Manual page 49

USER GUIDE USER MANUAL
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
POR
For coverage area of the satellites for NWC Voyager,
see Satellite Coverage Map
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
NWC Voyager
Indian Ocean Region
Pacific Ocean Region
in Getting Started.
SYSTEM DESCRIPTION
Satellite positions.
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).
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