• Number: 631/PP/GRO/RCH/17/9876

The European Commission is in the process of defining a roadmap for the long-term evolution of EGNOS beyond the current EGNOS Service Releases of EGNOS V3. EGNOS services for aviation safety beyond 2025 could take any of the following three directions:

1. Enlarge the provision of EGNOS services to CNS/ATM beyond navigation, notably to address surveillance (ADS-B) and possibly to support timing services for communications systems. This approach is aligned with the vision of integrated-CNS.
2. Provide additional features to increase robustness against external threats/attacks to the EGNOS navigation service, whether intentional or unintentional. These could include adding authentication to GNSS signals or ad-hoc features at antenna and receiver level.
3. Enhance the navigation, positioning and/or timing performance at user-level, for instance by reducing the vertical position accuracy and the time-to-alert to enable supporting Cat-II approach procedures.

The work carried out by the tender winner should analyse and define the reasoning behind each of the three possible directions beyond 2025, determine the constraints and pre-requisites, and assess the added value to end-users.

The analysis must examine each possibility separately. It should determine under which conditions it would be beneficial to implement these services.

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