System Satellites; Transmission Frequencies - Nera WorldPro 1010 User Manual

APPENDIX A - SYSTEM OVERVIEW

System satellites

The satellites are positioned in a geostationary orbit
above the equator at approximately 35700km alti-
tude.
See figure A-2.
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.
Nera WorldPro can communicate via the three satel-
lite Ocean Regions:
F1 Indian Ocean Region
F2 Atlantic Ocean Region
F3 Pacific Ocean Region
The coverage area of the satellites for Nera WorldPro
(BGAN) is shown on the Satellite coverage map, see
earlier in this manual. Communication is possible in ar-
eas marked with brown and reddish brown (light grey
and grey when printed in black), indicating spotbeam
coverage.

Transmission frequencies

The Inmarsat BGAN terminals operate in the follow-
ing L-band frequencies:
MES transmission frequencies:
1626.5 MHz - 1660.5 MHz
MES receiving frequencies:
1525.0 MHz - 1559.0 MHz
A-2 A-2
'
cont d
Figure A-2
Satellite positions.
SAS (Satellite Access Station)
Two SAS stations cover both the IOR and AOR-E satel-
lite regions. See figure A-3.
The SASs provide the interface to the international
networks for telephony and data: PSTN (Public
Switched Telephone Networks), PSDN (Packet
Switched Data Networks) and Mobile Telephone
Networks.
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Nera WorldPro 1000/1010
USER GUIDE