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

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

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

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

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

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)

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

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. 2001. 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

And future likely additional SBAS systems .. GAGAN

EGNOS INDUSTRIAL CONSORTIUM

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.

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).

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

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. 2003. Daily transmissions since July 2004. EGNOS final functional/performance qualification planned end 2004. ESA. ESA Receiver Workshop Conclusions. Paris 3.7.2003

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)

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

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

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

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 1998. 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

Combined Services

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

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

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

Feasibility Analsyis EGNOS extension in Africa (ISA System)

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

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 (2004-2005) 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).