International Civil Aviation Organization
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Transcript of International Civil Aviation Organization
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
International Civil Aviation Organization
GALILEO
CAR/SAM ATN/GNSS SeminarVaradero, Cuba, 6 to 9 May 2002
Presentation GNSS 4.3 by E. Chatre
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
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
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
Space Segment• Constellation Configuration
altitude ~23616 kmSMA 29993.707 km
inclination 56 degrees
• period 14 hours 4 min• ground track repeat about 10 days
GGALILEOALILEO DATADATA
27 + 3 satellites in three Medium Earth Orbits (MEO)
Walker 27/3/1Constellation
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
Signal Baseline
• Open and Safety Of Life Signals
E5A
1300MHz
1164MHz
1215MHz
1260MHz
1559MHz
1591MHz
Upper L-BandLower L-Band
E5B E6 L1E2 E1
FREQUENCY (MHZ)
IN PHASE
E5A
1300MHz
1164MHz
1215MHz
1260MHz
1559MHz
1591MHz
Upper L-BandLower L-Band
E5B E6 L1E2 E1
FREQUENCY (MHZ)
IN PHASE
Signal Frequency Chip Rate Data Rate
1 1176 10MHz 50
2 1207 10MHz 250
3 1575 2MHz 200
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
Space Segment• Constellation Performance
• Horiz accuracy around 4m (95%)• Vertical accuracy around 8m (95%)
MEO Constellation for optimal MEO Constellation for optimal European CoverageEuropean Coverage
52Vertical Accuracy in metres
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
Space Segment• Satellite Payload
GALILEOGALILEO In Flight Configuration
Overall Spacecraft:
650 Kg / 1.5 kW class
Launcher Options:
Ariane, Proton, Soyuz,
…...
Navigation payload: 70-80 Kg / 850 W
Search and Rescue (SAR)
transponder: ca. 20 kg
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
Ground Segment• Overview
Delta Integrity Processing Facilities (TBC)
Constellation - 30 satellites
Galileo Control CentreGCC2Galileo Control Centre
GCC1
11 m antenna
Communications Networkfull redundancy
5 Dedicated Mission Up-link Sites
TT&C S-band Up-link(incl. PRS nav)
Mission C-band Up-link (nav/integ/SAR/NRS)
Mission C-band Up-link (nav/integ/SAR/NRS)
IPFsOSPFs PTF
Satellite Control Facility
SCF
Operated Components
Mission Control Facility
MCF
GroundAssets
Control FacilityGACF
GSS
NAV. CHAIN
INT. CHAIN
B-UP CHAIN
5 Combined Galileo Up-link Sites, GUS (global coverage)
from Regional IDSfrom S&Rfrom NRS TBCService
Products Facility
SPF
externalcomms
~ 20 Galileo Sensor Stations(Global Coverage - DOC 4)
excl. redundancy
from Regional IDSfrom S&R
TWTTF
Galileo Mission Monitoring Office
MMO
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
GALILEO Ground Control Stations
for illustration only
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
System Boundaries
USER SEGMENT
IMS
GALILEO CORE SYSTEM
TTC uplink
GCC
L-bandNAV
UHFSAR
….
REGIONALCOMPONENTS
LOCALCOMPONENTS
COSPAS-SARSATGROUND SEGMENT
MEO CONSTELLATION
External ComplementarySystems
C-band uplink
regional uplink
S-b
and
uplin
k
GSS Network
ICC
IMSNetwork
ICC
IMSNetwork IULS
Communication link
LocalInfra-
struct.
Communication link
LocalInfra-
struct.
.
.
.
.
.
.
NAV SIS NAV SIS
NAV SIS NAV SIS
INTEGRITY DETERMINATION& DISSEMINATION
NAVIGATION CONTROL &CONSTELLATION MANAGEMENT
Mission uplink
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
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
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
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
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
GALILEO Schedule• 4 Phases
– Definition Phase• 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
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
GALILEO Schedule
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 ….
DefinitionPhase Design
Development& In-Orbit Validation
Phase
Full Deployment
Phase
...
DEF
DDV
LOR
Initial Galileo
Full Galileo
Operational Galileo
1.250 B€1.250 B€ 2.150 B €2.150 B € 220 M€ p.a.220 M€ p.a.80 M€80 M€
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GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
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
www.galileo-pgm.orgwww.esa.int/navigation