GALILEO - Understanding GPS: Principles and Applications - page 580

Direct C-band Uplinks
for integrity

Constellation - 30 MEO Satellites

Total: 5 S-band heads Total: at least 31 C-band heads

13m antenna

ERIS

Mission C-band Uplink
(Nav/Intel/SAR/NRS/PRS)

Mission C-band uplink
(Nav/Intel/SAR/NRS/PRS)

TT&C S-band uplink

+4 dedicated mission
uplinks sites

5 combined GALILEO uplinks sites
(global coverage)

ERIS - external regional integrity systems
GCS - GALILEO control system
GMS - GALILEO mission system
GSS - GALILEO sensor stations
MDDN - mission data dissemination network
NRS - navigation related service
PRS - public regulated service
SAR - search and rescue
SDDN - satellite data dissemination network
TT&C - telemetry, tracking and telecommand
ULS - uplink station

SDDN

MDDN/ULS Network

Ground Control and Mission Segments Facilities

GALILEO control center 2 (GCC2)
(geographical redundant)

to external
service
providers
and other
entities

GALILEO control center 1 (GCC1)

MDDN/GSS Network

Elements of GCS and GMS
Elements of GMS
Elements of GCS

− 40 GSS

Figure 10.9 GALILEO system architecture.