System Satellites; Transmission Frequencies; Sas (Satellite Access Station - Thrane&Thrane EXPLORER 110 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 fi gure 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:
Indian Ocean Region
F1
Atlantic Ocean Region
F2
Pacifi c Ocean Region
F3
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 fi gure 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.
F3 178°E
Pacific Ocean Region
Atlantic Ocean Region
Indian Ocean Region
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