– Aircraft Earth Stations (AESs).
– Space segment formed by three Inmarsat-4 and an Inmarsat-4A geostationary satellites
that provides global coverage, except for the polar regions. This will be supplemented by
Inmarsat-6 satellites, which are scheduled for launch in 2020.
– A terrestrial ground infrastructure formed by the Satellite Access Stations (SASs).
– Terrestrial interconnect networks.
– Network Control Centre and a Business Support System.
(4) The user links are in L-band 1518-1559 MHz for satellite to AES, 1626.5-1660.5 MHz and
1668-1675 MHz for AES to satellite.
C.
Expected
Data
Rate
(1) The data rate through the Small Satcom terminal is dependent upon many factors such as size
of ground plane, network congestion, satellite selection, multipath fading, satellite elevation,
UAV banking etc. In general, the satellite with the highest elevation will work best and severe
banking away from the satellite should be avoided.
(2) Forward refers to data being passed from the ground and return refers to data being passed
from the UAV as seen in Figure 2.
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
SMALL SATCOM
