1. The EGNOS System Architecture Status and Future Plans
Dr J. Ventura-Traveset
European Space Agency (ESA), EGNOS Project Office
European Space Agency

2. Outline EGNOS System: Overview EGNOS Status and performance Summary
EGNOS Evolutions. Why? What? When?
Summary

3. EGNOS the European SBAS: added value
GEO
Integrity
(Use /
Don't Use)
GPS-like
signals
Differential
corrections
+ ACCURACY
+ AVAILABILITY
+ CONTINUITY
+ SAFETY

5. EGNOS AOC Architecture
GEO
GLONASS
AOR-E
IOR-W
ARTEMIS
GPS
RIMS
NLES
(x 6)
EWAN
MCC 1
MCC 2
MCC 3
MCC 4
PACF
ASQF

6. EGNOS Ground Segment Development
EGNOS Ground Segment is made of
Four Mission Control Centers, hosting each
a Central Processing Facilities
a Central Control Facilities,
Collecting data from 34 RIMS Sites hosting
Branch A, used for Processing
Branch B, used for integrity checks
Branch C, to track specific GPS satellite failure modes
Feeding Six Land Earth Stations
Broadcasting EGNOS Messages to users via 3 GEO Satellites
All interconnected via real-time digital network

7. All EGNOS S/S are fully qualified and deployed
RIMS A, B and C
Central Processing Facility
CPF
Land Earth Station HW
Central Control Facility (CCF)

8. EGNOS Subsystems Deployment
-40
-30
-20
-10 10 20 30 40 50 60 70
Longitude (°)
Latitude (°)
GON
BRN
KIR
GLG FU
LAN
GVL
ALB
ZRH
LAP
WRS
RKK
TRD
MAL
PDM
CNR
SDC
HBK (South Africa)
TOR
PAR
MON
(Canada)
TRO
ACR
MAD
CTN
SCZ
CIA
AUS
KOU (French
Guyana)
SWA
EGI
CRK
RIMS
MCC
NLES
PACF
ASQF
TLS
LSB
BNG
(India)
GOL
SOF
DJA
DAB
MAUR

9. SBAS Interoperability
Let us recall that EGNOS is one of three Satellite-Based Augmentation Services (SBAS), the two others being the United States WAAS and the Japanese MSAS.
Those system are developed against GNSS1 Standards, that, fter more than 6 years of intensive standardisation efforts, are now finalised by the International Civil Aviation Organisation (ICAO) in the form of SARPS (Standards and Recommended Practices). These standards are now part of Annex 10 of the Chicago Convention, with an applicability date of the 1st of Nov
Those SBAS are primarily defined as regional systems, and co- operation/co-ordination among the different systems will enable to provide a seamless world-wide navigation system. To this aim, the three systems have set up common interoperability requirements, and this is monitored via regular “Interoperability Working Group (IWG)” meetings between system development teams.
In addition to interoperability, EGNOS has built-in expansion capability to enable extension of the services over regions within the Geostationary Broadcast Area of GEO satellites used, such as Africa, Eastern countries, and Russia.
The combination of SBAS Interoperability and expansion concepts will allow to provide a true global world-wide GNSS1 navigation seamless service, and actions are being pursued with international partners to exploit this capability, towards a full seamless service over wider areas.
EGNOS is an integral part
of 3 inter-regional systems

10. And future likely additional SBAS systems ..
GAGAN

11. EGNOS INDUSTRIAL CONSORTIUM

12. EGNOS Key Challenges
Ensure ionosphere (GIVE) and GPS integrity (UDRE) for a 15 years operational scenario, and still provide adequate availability (99%) and continuity (8x10-5/150 sec);
EGNOS SBAS formal certification for Safety of Life (institutional and technical issue);
EGNOS to penetrate in a large number of multi-modal markets reducing the time to service of Galileo;
EGNOS evolution after EGNOS V1 (service extension and GPS modernisation);
EGNOS and Galileo technical and service provision integration.

13. EGNOS is intended for multi-modal applications
EGNOS/SISNET for public bus transportation (NAVOCAP, France; and also GMV, Spain)
EGNOS dissemination through FM RDS in cars (TDF, France)
EUROCOPTER (Helicopter Emergency Medical Services, Germany/France)
EGNOS to support Precision Farming (Booz Allen, UK)
DELTA hybridation test in airports (M3 systems, France, and also at Sweden)
EGNOS disseminations through DAB radios (BOSCH/ BLAUPUNKT, Germany)
Internet EGNOS transmission: SISNET Pocket PC PDA receiver (Finish Geodetic Institute, Finland)
EGNOS/SISNET to support blind pedestrian (GMV and ONCE Spain).

14. Outline EGNOS System: Overview EGNOS Status and performance Summary
EGNOS Evolutions. Why? What? When?
Summary

15. The deployment of the EGNOS infrastructure is close to complete
All 4 Master Control Centres (MCC) have been deployed;
All Navigation Land Earth Stations; (NLES) have been deployed;
30 of the 34 RIMS are today deployed;
All 3 EGNOS Geostationary satellites are transmitting successfully;
EGNOS transmission/performances since Dec Daily transmissions since July 2004.
EGNOS final functional/performance qualification planned end 2004.
ESA. ESA Receiver Workshop Conclusions. Paris

16. EGNOS Measured Accuracies Sept 5, 2004 (24h)
Lisbon
Toulouse
Rome
Brussels
Paris
HNSE
95%
1.2 m
0.9 m
1.1 m
0.8 m
1.0 m
VNSE
1.7 m
1.4 m
1.3m
To be noted:
Less than 1 m horizontal accuracies recorded in EGNOS quite often;
Excellent vertical accuracies 1-2m (well below the 7.6 m specification)

17. Service availability measured in ESA/ESTEC (NL) Sept 20, 2004 (26 out of 34 RIMS used)

18. Service Coverage Sept 5, 2004 (24h) (with 26 RIMS out of 34)

19. Outline EGNOS System: Overview EGNOS Status and performance Summary
EGNOS Evolutions. Why? What? When?
Summary

20. In parallel to the start of EGNOS operations, EGNOS needs to respond positively to the dynamic GNSS environment
EGNOS AOC is based on a MRD Document developed in This allows EGNOS V1 service provision in 2004 with excellent performances.
Since then, the GNSS environment has changed significantly:
Galileo programme
GPS Modernisation program (IIR-M, IIF)
New L1/L5 GEOs
Export opportunities for SBAS technology
GPS/SBAS L5 standardisation work
WAAS FOC program launched
EGNOS V2 concept

21. Combined Services

22. Three EGNOS V2 versions conceived in 2005-2008
STEP 1
STEP 2
EGNOS V2.1 end 2005
EGNOS V2.2 end 2007
EGNOS V2.3 end 2008

23. Proposed EGNOS V2 core Infrastructure Evolution Plan focuses on user-beneficial functional evolutions
STEP 1
STEP 2
EGNOS V2.1 in 2006
EGNOS V2.2 in 2007
EGNOS V2.3 in 2008
EGNOS products over non-GEO data links (INSPIRE)
Extension to MEDA and East of Europe
Other issues (MT0/2, Standard necessary adaptations)
EGNOS MT 28
Extension in Africa
Modernised RIMS receivers
SAR return link
L5 standards and L5 GEO broadcast
GNSS “sole service” using combined EGNOS/GALILEO
L1/L5/Galileo (TBC) enhanced RIMS receivers

24. INterface System for the Provision In Real time of the EGNOS product (INSPIRE)

26. Feasibility Analsyis EGNOS extension in Africa (ISA System)

27. Outline EGNOS System: Overview EGNOS Status and performance Summary
EGNOS Evolutions. Why? What? When?
Summary

28. Summary
EGNOS is the European SBAS and a first step towards GALILEO, the European SATNAV constellation.
EGNOS AOC (EGNOS V1) is close to conclusion. EGNOS Initial performances are very good, with accuracies 1-2m and good APV availabilities
Almost Continuous transmission since July 2004 for the three EGNOS GEOs; formal EGNOS qualification end 2004, delivering a very valuable service to users
In parallel to operations and without any operational interruption, EGNOS will keep modernising and improving services in 2004/2008 (EGNOS V2), in response to new identified needs (e.g. Galileo and GPS modernisation, service extension).
Step I of this modernisation ( ) has been approved. This includes the release of EGNOS V2.1 early 2006, with 2 main new missions: service extension (south/east) and non-GEO service multi-modal provision (INSPIRE).
Step 2, to be confirmed in 2005, includes EGNOS extension in Africa (2007) and SBAS L1/L5 services (2008).