1. International Civil Aviation Organization
GALILEO
CAR/SAM ATN/GNSS Seminar
Varadero, Cuba, 6 to 9 May 2002
International Civil Aviation Organization
Presentation GNSS 4.3 by E. Chatre

2. GALILEO Overview High Level Architecture
Consist of 30 (27+3) satellites and associated ground infrastructure
Best solution in terms of robustness and performance homogeneity, including northern latitudes
Use CDMA signals on 4 frequencies
Offer different services (OS-SoL-CS and PRS + SAR)
Implement concept of Global Integrity
Certify system performance
Fully Operational by 2008

3. Space Segment
Constellation Configuration

4. Open and Safety Of Life Signals
Signal Baseline
Open and Safety Of Life Signals
Signal
Frequency
Chip Rate
Data Rate 1
1176
10MHz 50 2
1207
250 3
1575
2MHz
200

5. Space Segment Constellation Performance Horiz accuracy around 4m (95%)
Vertical accuracy around 8m (95%)

6. Space Segment GALILEO In Flight Configuration Satellite Payload
Overall Spacecraft:
650 Kg / 1.5 kW class
Launcher Options:
Ariane, Proton, Soyuz, …...
Navigation payload: Kg / 850 W
Search and Rescue (SAR)
transponder: ca. 20 kg

7. Ground Segment
Overview

8. GALILEO Ground Control Stations
for illustration only

9. System Boundaries …. GALILEO CORE SYSTEM REGIONAL LOCAL COMPONENTS
USER SEGMENT
IMS
GALILEO
CORE SYSTEM
TTC uplink
GCC
L-band
NAV
UHF
SAR ….
REGIONAL
COMPONENTS
LOCAL
COSPAS-SARSAT
GROUND SEGMENT
MEO CONSTELLATION
External
Complementary
Systems
C-band uplink
regional uplink
S-band uplink
GSS
Network
ICC
IULS
Communication link
Local
Infra-
struct. .
NAV SIS
INTEGRITY DETERMINATION
& DISSEMINATION
NAVIGATION CONTROL &
CONSTELLATION MANAGEMENT
Mission uplink

10. Local Elements Viewed as an integral part of the overall system
-Recognised that a great many applications will require Local Elements i.e. Category III landing
- Existence of capabilities considered and defined within the High Level documents of GALILEO
Local services may be offered by the Galileo Operating Company or external service providers
Possible to offer certified services where necessary
Demonstrators of Local Elements will form part of the GALILEO development process and indicate achievable performance levels

11. Local Elements Performance Enhancement in the following:
Position, Velocity, Time
Differential Code
Carrier - TCAR
Availability
Pseudolite
Integrity
Time To Alarn (TTA), and alam limit
Communication
Single or bi-directional
Voice, Data or Both
Local Elements will offer different combinations of these enhancements to different extents over different service volumes
Base level performances will be specified

12. GALILEO Schedule 4 Phases Definition Phase Development and Validation
Up to end 2001
Initial definition of the GALILEO requirements and architecture
Development and Validation
2002 through 2005
Consolidation of Mission Requirements
Development of satellites and ground based components
In Orbit validation
Deployment
2006 through 2007
Construction and launch of satellites
Installation of complete ground segment
Operations
2008 onwards

13. GALILEO Schedule ….
DEF
Initial Galileo
Full Galileo
DDV
Operational
Galileo
Definition
Phase
LOR
...
Design
Development
& In-Orbit Validation
Phase
Full
Deployment
Phase
1.250 B€
2.150 B €
220 M€ p.a.
80 M€

14. www.galileo-pgm.org www.esa.int/navigation Summary
GALILEO a joint EU / ESA initiative
Unanimous support from both ESA and EU councils
EC politically responsible, ESA technically responsible
Builds upon existing European experience in field of GNSS (EGNOS)
Designed from a civilian perspective
Independent from, but interoperable with other systems
GPS, GLONASS, EGNOS, UMTS etc.
Brings additional robustness for civil aviation
Further information can be found at the following Web sites