galileo interim support structure european commission 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
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
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
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
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
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
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
GALILEO INTERIM SUPPORT STRUCTURE
EUROPEAN COMMISSION
GALILEO Ground Control Stations
for illustration only
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
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
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
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
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€
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