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PJ25 XSTREAM Report Summary

Project ID: 734145
Funded under: H2020-EU.3.4.7.

Periodic Reporting for period 1 - PJ25 XSTREAM (Cross Border SESAR Trials for Enhanced Arrival Management)

Reporting period: 2017-01-01 to 2017-12-31

Summary of the context and overall objectives of the project

In major hub airports, during peak hours, variation in aircraft arrival times exceed the capacity of the destination airport to handle them without incurring airborne delay. These delays can be computed through Arrival Management systems (AMAN), that take into consideration runway capacities, aircraft characteristics and separation standards to compute an arrival sequence. However, in today’s operation, the arrival management strategy is decided & implemented at a late stage of the flight since most of AMANs have limited horizon, capability and accuracy. Because of this late implementation, the tendency is to absorb those delays at low levels in the TMA, generating high workload for Air Traffic Control Operators (ATCO), extra costs for airlines and poor environmental efficiency.

The objective of the xStream project is to demonstrate, at a very large-scale, new extended arrival management tools and techniques that improve flight efficiency and flight predictability at airports, in TMA, Extended TMA, and in upstream ACC. To meet this objective, the project will define concept and tools for:
• Computing an extended arrival sequence with an horizon of at least 200 NM,
• Defining a delay sharing strategy between TMA, extended TMA and en-route sectors taking into account the overall network capacity and airspace users preferences;
• Providing the calculated arrival constraints to upstream Area Control Centres (ACC) and to relevant aircrafts with AMAN Allocated Time (AAT), Target Time of Arrival (TTA), Time to Lose (TTL), Miles in Trails, Speed advisory, etc,
• Executing the delay sharing strategy.

Demonstrations will consist in flight live trials in major European hub airports:
• London Gatwick & Heathrow airports,
• Paris CDG & Orly airports,
• Zurich airport.

For a global picture, the project will also assess the compatibility of these concepts with the handling of inbound flows to multiple airports in the sectors of upstream ACCs. The objective is to avoid cumulative effects that could degrade the upstream sectors capacity or flight efficiency.

They will involve the largest number of upstream ACCs around those platforms (Reims, Maastricht, Bordeaux, Karlsruhe, Brest, Geneva, Zurich, etc.).
Some trials will also be performed in en-route airspace to demonstrate how multiple arrival constraints can be handled.
The project will also associate Airspace Users in order to implement collaborative processes for the management of arrival sequence (A-Flex).
As part of the SESAR 2020 programme, the demonstrations will contribute to SESAR CONOPS definition and engineering standardization work concerning the benefits brought by Extended Arrival Management (E-AMAN).

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

During the reporting period, the following work towards the achievement of the objective of this project has been carried out:
- Conops: based on SESAR1 work and inputs from demonstration sites, a high-level framework was defined to ensure compatibility and complementarity of trials.
- Trial design and preparation: performed for Paris, London and Zurich trials, involving all concerned ACCs, airspace users and the network manager.
- Definition of system requirements and development: technical interfaces between partners were defined (webservices, e-EFD data format, feedback through XMAN Status, network pre-requisites, communication with Network Manager, etc.). This prepares the development of AMAN prototypes and displays in upstream ACCs.

A first trial was conducted in Paris Orly between July 25th and August 28th to evaluate the tactical arrival management operations extended up to 250 nautical miles from the airport. The collaborative E-AMAN process was implemented between Orly Approach, Paris and Bordeaux Area Control Centres, with the objective of smoothing the morning arrival traffic peak and mitigating controller’s workload in the terminal area (TMA) by reducing vectoring and holding.

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)

The objective of PJ25 project is to pave the way for evaluating concepts from the PCP, within an integrated global collaborative management of arrivals, including Airports, ACCs and Airlines. The objective is to reduce ATFCM and ASMA delays in the TMA/E-TMA and increase flight efficiency. The major benefits are on the following Key Performance Areas (KPAs):
• Capacity : Airspace capacity,
• Cost efficiency: ANS Cost efficiency,
• Environment : Fuel efficiency,
• Predictability and punctuality: Variance of actual and reference business trajectories,
• Flexibility: ATM System & Airport ability to respond to changes in planned flights and mission,
• Safety: Accidents/incidents with ATM contribution,
• Interoperability: Capability of ANSP systems to share/manage arrival constraints.

The concepts developed in PJ-25 are expected to enhance arrival management, by providing less penalizing, sharper and more efficient ATFCM and Queue Management tools. The project will demonstrate the feasibility of TTA, dDCB and delay sharing concepts in an operational environment. The success of these demonstrations will lead to a quick operational implementation in participating units, in order to comply with the PCP. Demonstration report and gathered expertise, by air navigation service providers, industrials and end-users, will enable to extend the use of the developed tools on other platforms.

First WP7 trials in Paris Orly showed very promising benefits of the Extended AMAN concept:
• Safety: not compromised. Very positive feedback on the efficiency and safety of the process from Air Traffic Controllers (ATCO) in Bordeaux ACC, Paris ACC and Orly.
• Flight efficiency: on nominal conditions and compared to similar 2016 runway works period, holdings reduced by 95%, ASMA reduced by 90 seconds. Positive feedback from airspace users.
• Capacity: optimal and continuous runway feed maintained.

Performance analysis and feedback from all participants paved the way for the preparation of 2018 trials.
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