Transcript Things to know - Punkt Informacyjny Galileo

GALILEO OVERVIEW AND STATUS
Alexandre Steciw
Cracow-23 September 2004
The European Approach (1)
 EGNOS
- Civil augmentation to military GPS and GLONASS
- Signals distributed through 2 Inmarsat / 1 Artemis Geo Transponders
- Interoperable with WAAS and MSAS (ICAO standard, seamless service)
- Pre-operational EGNOS Signals already available through EGNOS Testbed
since early 2000 – used for tests and demonstrations
- Fully Operational Signal in 2004
- Initiative of the European Commission, Eurocontrol and ESA
 EGNOS is the first contribution of Europe into GNSS and the first
step towards Galileo
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The European Approach (2)
 Galileo
- Global Navigation Satellite System
- Under Civil Control
- Independent but compatible and interoperable
with GPS and GLONASS
- With service guarantees
- Target Date to be operational - 2008
- Initiative of the European Commission and ESA
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Galileo Services
•Galileo Satellite-only Navigation, Positioning & Timing Services
(through the Galileo Signal-In-Space):
 Open Service (OS) –free and available to the public
 Commercial Service (CS) – under commercial conditions
 Safety of Life Service (SoL)- for safety-of life applications & users
 Public Regulated Service (PRS)- for government authorised users
•Support to the Search and Rescue Service (SAR):
 406/1544.1 MHz transparent Forward Link for COSPAS/SARSAT
compatible distress beacons localisation in the COSPAS/SARSAT ground
segment
 SAR Return Link Messages (Acknowledgement & Coordination) through
Galileo Signal in Space
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Galileo Services
•Galileo Locally Assisted Services:
 Network Assisted/ Location Based Services
 Indoor Positioning Services
 High Precision Navigation & Positioning Services
•Galileo SIS plus Local Augmentations:
 Improved safety-of life applications, e.g. for trains & railways, port
navigation, precision landing approach etc.
 Road applications (predicted adaptive cruise control, tolling etc.)
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Galileo Services
•Galileo Combined Services
 Galileo + other satellite navigation system (SBAS, GPS, GLONASS,...)
 Galileo + other non-satellite navigation systems (LORAN C, mobile
systems,…)
 Galileo + communications systems (GSM, GPRS, UMTS,…)
EGNOS Services augmenting GPS and complementing Galileo services
 Wide area differential corrections for GPS over ECAC region
 Real-time Integrity messages for GPS-based Safety-of Life applications
 Ionosphere corrections for single-frequency users
 Complementary GPS-like ranging signals for improved availability
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GALILEO Open Services Performance
Open Service
Type
Receiver
of
Carriers
Single Frequency
Ionospheric
correction
Based on simple
model
Coverage
Accuracy (95%)
Timing Accuracy wrt UTC/TAI
Availability
Global
H: 15 m
V: 35 m
30 nsec
99.8 %
DualFrequency
Based on dualfrequency
measurements
H: 4 m
V: 8m
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GALILEO SOL Performance
Safety-Of-Life Service
Type of Receiver
Carriers
Computes
Integrity
Ionospheric
correction
Coverage
Three Frequencies
Yes
Based on dual-frequency measurements
Global
Critical level
Accuracy (95%)
Integrity
Alarm Limit
Time-To-Alarm
Integrity risk
Continuity Risk
Certification/Liability
Availability of integrity
Availability of accuracy
H: 4 m
V: 8 m
H: 12 V 20 m
6 seconds
3.5x10-7 / 150 s
10-5/15 s
Non-critical level
H: 220 m
H: 556 m
10 seconds
10-7/hour
10-4/hour – 10-8/hour
Yes
99.5%
99.8 %
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GALILEO + GPS Combined Performance
Horizontal
accuracy
Vertical
accuracy
Galileo OS
(10° m.a.)
single
frequency
receiver
15
Galileo OS
+ GPS (10°
m.a.) single
frequency
receiver
7-11
Galileo OS
(10° m.a.)
dual
frequency
receiver
4
Galileo OS
+GPS (10°
m.a.) dual
frequency
receiver
3-4
Galileo OS
(30° m.a.)
single
frequency
receiver
14-54
Galileo OS
+ GPS (30°
m.a.) single
frequency
receiver
11-21
35
13-26
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6-8
21-81
17-32
Galileo OS and GPS combined service performances (illustrative)
Receiver elevation
masking angle
5°
10°
15°
Number of visible
GALILEO satellites
13
11
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Number of visible
GPS satellites
12
10
8
Total
25
21
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Maximum number of visible satellites for various masking angles
Combined use provides increased performance and availability (RAIM)
for high masking angle, e.g. urban canyons
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GALILEO Frequency Plan, L-Band
ARNS Bands
ARNS Bands
RNSS Bands
E5a/L5
E5b
L2
RNSS Bands
E6
SAR
E2
L1
E1
GALILEO Bands (Navigation)
GALILEO SAR Downlink
GPS Bands
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GALILEO Signals
F/Nav Signal:
Data+Pilot
BPSK mod.
Rc=10.23 Mcps
Rs=50 sps
L5/E5a
I/Nav Signal:
Data+Pilot
BPSK mod.
Rc=10.23 Mcps
Rs=250 sps
C/Nav Signal:
Data + Pilot
BPSK mod.
Rc=5.115 Mcps
Rs=1000 sps
G/Nav Signal:
BOC(10,5) mod.
Rc=5.115 Mcps
E6
E5b
I/Nav Signal:
Data + Pilot
BOC(2,2) mod.
Rc=2.046 Mcps
Rs=250 sps
G/Nav Signal:
BOC(n,m) mod.
E2
L1
E1
DATA CHANNELS
Frequency
(MHz)
PILOT CHANNELS
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GALILEO Signal Parameters
Bands
E5a
E5b
E6
Services
OS/SOL/CS
OS/SOL
PRS
Channels
Data
Pilot
Data
Pilot
Ranging
Code Rate
(Mcps)
10.23
10.23
10.23
10.23
Modulation
Type
AltBOC
Symbol
Rates
(Bd)
50
N/A
250
-158
-158
-158
Minimum
Received
Power on
Ground at
E2-L1-E1
CS
PRS
Data
Pilot
10.23
5.115
5.115
BOC
(10,5)
BPSK
(5)
N/A
---
-158
-155
OS/SOL/CS
Data
Pilot
m
2.048
2.048
BPSK
(5)
BOC
(n,m)
BOC
(2,2)
BOC
(2,2)
1000
N/A
----
250
N/A
-158
-158
-155
-160
to
-158
-160
to
-158
10o elevation
in dBW
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GALILEO Architecture
Distress
Beacons
Space Segment
MEO-LUT
COSPAS-SARSAT
Ground Segment
External Regional
Integrity Systems
RLSP
Search
&
Rescue
Local Component Demonstrator
Local Components
User Receiver Demonstrators
Service Providers
User Receivers
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The GALILEO Satellite
Mass at Launch (incl. Propellant)
Ca.680 kg
Power Consumption
Ca. 1.6 kW
Dimensions:
Main Body
Length (with deployed solar arrays)
Lifetime
2700 x 1200 x 1100 mm
13 m
12 years
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The GALILEO Ground Segment
•The Galileo Ground Segment comprises the Ground Control Segment
(GCS) and the Ground Mission Segment (GMS) and includes:
•A global network of Galileo Sensor Stations (GSS)
•A global real-time oriented network of Up-link Stations (ULS) for
mission data up-link in C-Band
•A global network of Telemetry, Telecommand and Ranging
Stations (TT&C) for control of the satellites in S-Band
•An interconnecting high performance communication network and
•2 geographically redundant Galileo Control Centres (GCC) for
all the centralised processing, monitoring & control.
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The GALILEO Ground Segment Architecture
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Considered TT&C & ULS Station Sites
Svalbard
or
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Locations considered for Sensor Stations
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GALILEO Master Schedule
48 months
Development and Validation
1 Test Satellite & 4 Operational
Satellites
Ground Infrastructure
24 months
Deployment
20 years
Operations and Maintenance
26 Satellites
Ground
Infrastructure
Routine Operations and Replenishment
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The European Commission 6th Framework
Programme
Complementing the Development
of the Galileo System
EC 6th Framework Programme, 1st Call
•Development of User Receivers
•Development of Local Elements
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



Preliminary Design of a Local Component Demonstrator
Preliminary Design of SAR G/S Elements, e.g. MEOLUT
Preliminary Design of a Galileo Time Service Provider
Preliminary Design of a generic Galileo Service Centre
Preliminary Design of a generic External Regional Integrity System
•Galileo Thematic Support
 certification
 external interfaces
 frequency issues
•EGNOS Integration into Galileo
•Development of Galileo Business Plan
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The European Space Agency Galileo System Test
Bed Programme
Mitigating the Technical Risk
for the Development of the Galileo System
ESA GSTB Activities
•GSTB V.1:
 Design and Verification Tool for the mitigation of the Galileo risks related to
algorithms
 Experimentation framework convoying the experience from European industries,
institutes and agencies towards common objectives
A GSTB V1 Processing Centre set-up at ESA/ESTEC, Noordwijk with access to
1-sec observed GPS dual-frequency data from 25 sensor stations worldwide
•GSTB V.2:
 Protection of GALILEO frequency filings
 In orbit atomic clocks experimentation
 MEO environment characterisation
 Signal experimentation
Two independent contracts are placed with European Industry (GAIN & SSTL) to
launch two Experimental Satellites by end of 2005
Experimentation activities are planned to be performed in the frame of the Galileo
IOV programme
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Conclusions
Galileo after EGNOS will provide a further
European Contribution into Global Navigation
Satellite Systems
Galileo will ensure interoperability with
existing systems for the benefits of the users
Galileo will be open for partnerships in other
regions
With the approval of the IOV Program for
Galileo - Galileo is becoming a reality
Thank you for your attention!
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