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EGNOS Future and Evolutions

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Title EGNOS Future and Evolutions
Edited by GMV
Level Basic
Year of Publication 2011
Logo GMV.png

The European Commission (EC) intends to ensure the future of EGNOS services for GPS L1 legacy users until at least 2030.[1] In this context, the budget should be secured to operate the system and manage the system obsolescence. Moreover, major EGNOS system evolutions towards a multi frequency and multi constellation configuration are currently being assessed with the objective to have them operational by 2020.[2]

A technical assessment of the potential EGNOS evolution, EGNOS V3, is currently done by the European Space Agency within the European GNSS Evolution Programme.


EGNOS Mission Roadmap and EGNOS Evolutions

The European Parliament and the Council have assigned the management of the EGNOS programme to the European Commission.[3] On the other hand, ESA is the technical player responsible for system design and development, and ESSP is the service provider.[4]

The European Commission, in its role of entity in charge of the management of the EGNOS programme, is defining the roadmap for the evolution of the EGNOS mission. This roadmap should cope with legacy and new missions:

To support this mission roadmap, EGNOS needs to evolve. This evolution is divided into minor updates of the current EGNOS version, EGNOS V2, and a major evolution leading to the provision of new services, EGNOS V3.

The minor evolutions in the current EGNOS version are performed in a regular basis at an approximate pace of an update per year, and aim at solving infrastructure obsolescence issues, at supporting the LPV200 service beyond APV1 and at improving the operation of the system.

The major evolution requires a full dedicated engineering cycle starting from the definition of the mission of the system highly coupled with a technical feasibility analysis in coordination with the evolution of the SBAS standards.

As regards the consolidation of the new EGNOS missions, the European Commission is in the process of setting up a consultative group of GNSS experts called the Mission Evolution Advisory Group (MEAG). MEAG aims at providing EC with independent advice and recommendations on potential evolutions of the mission objectives and the service definitions for the European satellite navigation programmes Galileo and EGNOS.[5] The group is expected to critically assess changes of both user needs and scope of space-based PNT, both on European and international scale. Changes on the mission and service requirements for the Galileo and EGNOS programme will be analysed too, proposing suitable updates of the mission and service baseline. MEAG members include experts from GNSS user communities, GNSS industry sectors, academia, national space agencies and other recognized experts from Member States. The MEAG meets on a regular basis with an indicative number of three meetings per year. The expert group may establish on an ad-hoc basis Working Groups to provide specialist support as required to carry out its activities. The MEAG shall further record and report its work results and recommendations on a yearly basis to the Commission.

As for the EGNOS technical evolution, ESA is managing several activities within the European GNSS Evolution Programme (see below).

Finally, the European Commission and the European Space Agency are very active in the different international co-operation fora in SBAS standardisation and SBAS interoperability ensuring the co-ordination of the EGNOS evolution with that of the other SBAS in the world.

The European GNSS Evolution Programme

The European GNSS Evolution Programme was defined in 2006 by ESA to address the second generation of the EGNOS and Galileo systems.[6]

Among many other tasks, the first phase of this programme included two parallel studies about the concept of Multi-Constellation Regional System (MRS) over 2007-2009. An outcome of this work was a generic MRS architecture baseline that should be considered as a candidate target for V3 functional architecture and further assessed and refined within the EGNOS V3 phase A definition study.[7]

The second phase of EGEP on SBAS (over 2010-2011) is devoted to the consolidation of system evolutions and to field testing. It is broken down into three main parts:[7]

The above-mentioned test-beds have the following objectives:[7]

In 2011, two parallel contracts have been commissioned by ESA to perform a Phase A (feasibility) study of EGNOS V3 Phase A. These studies are considering different target missions with different levels of consolidation:[8]

Concerning the provision of additional services (i.e.: support to ADS-B, maritime, high precision, land-users…), the objective is that the design will ensure that EGNOS has sufficient in-built expandability and upgradeability capabilities to allow the provision of new products.



  1. ^ EGNOS Safety of Life Service Definition Document
  2. ^ Analysis Of Safety Of Life Service Provision For The European GNSS Elements, EGPC-10-04-23-04, 16 April 2010, European GNSS Programmes Committee, European Commission
  3. ^ Regulation (EC) No 683/2008 of the European Parliament and of the Council of 9 July 2008 on the further implementation of the European satellite navigation programmes (EGNOS and Galileo)
  4. ^ Mid-term review of the European satellite radio navigation programmes
  5. ^ Call for Applications for the Establishment of the Mission Evolution Advisory Group, European Commission Enterprise and Industry
  6. ^ EGNOS Evolution Plans and the GNSS Evolutions Programme; R. Lucas Rodriguez, F. Toran, R. Dellago, B. Arbesser-Rastburg, D. Flament; Proceedings of the 2009 International Technical Meeting of The Institute of Navigation January 26 - 28, 2009.
  7. ^ a b c Statement of Work EGNOS V3 Definition Phase, ESA-DTEN-NF-SoW/01281, Issue 1.0, 08/07/2010, ESA.
  8. ^ EGNOS V3 Mission Guidelines Document, E-RD-SYS-E-0039-ESA, Issue 1.1, 18/01/2011, European Space Agency
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