Xavier Prats
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View article: Hybrid method for holistic air traffic demand and capacity balancing optimisation based on sector complexity
Hybrid method for holistic air traffic demand and capacity balancing optimisation based on sector complexity Open
International audience
View article: Assessing Continuous Descent Operations Using the Impact Monitor Framework
Assessing Continuous Descent Operations Using the Impact Monitor Framework Open
The Impact Monitor Project is a European initiative designed to develop an impact assessment toolbox and framework, targeting the European aviation sector. The proposed framework is not only aimed at the environment, economics, and operati…
View article: An Automated Airborne Support Tool for Aircraft Emergencies: Selection of Landing Sites and 4D Diversion Trajectories
An Automated Airborne Support Tool for Aircraft Emergencies: Selection of Landing Sites and 4D Diversion Trajectories Open
We present a software prototype (SafeNcy) capable of automatically choosing and ranking landing sites for emergency situations and of generating four-dimensional (4D) trajectories towards these sites. We describe the modules composing this…
View article: A flight-procedure generation framework based on an RRT* path planning algorithm
A flight-procedure generation framework based on an RRT* path planning algorithm Open
We introduce a flight-procedure generation framework that relies on the optimal version of the rapidly-exploring random tree (RRT*) algorithm, where nodes are connected using Dubins paths. This framework is employed for the generation of r…
View article: Machine-Learning Methods Estimating Flights’ Hidden Parameters for the Prediction of KPIs
Machine-Learning Methods Estimating Flights’ Hidden Parameters for the Prediction of KPIs Open
Complex microscopic simulation models of strategic Air Traffic Management (ATM) performance assessment and decision-making are hindered by several factors. One of the most important is the existence of hidden parameters—such as aircraft ta…
View article: Considering Expected TMA Holding into In-flight Trajectory Optimization
Considering Expected TMA Holding into In-flight Trajectory Optimization Open
Aircraft crew are aware of the delay they have experienced at departure. However, uncertainties ahead, and in particular holdings at arrival, can have an impact on the final performance of their operations. When optimizing a trajectory, th…
View article: Generation of RNP Approach Flight Procedures with an RRT* Path-Planning Algorithm
Generation of RNP Approach Flight Procedures with an RRT* Path-Planning Algorithm Open
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View article: Domain-driven multiple-criteria decision-making for flight crew decision support tool
Domain-driven multiple-criteria decision-making for flight crew decision support tool Open
During the flight, the crew might consider modifying their planned trajectory, taking into account currently available information, such as an updated weather forecast report or the already accrued amount of delay. This modified planned tr…
View article: CO<sub>2</sub> and non-CO<sub>2</sub> balanced Environmental Scores Module for flight performance evaluation and optimisation
CO<sub>2</sub> and non-CO<sub>2</sub> balanced Environmental Scores Module for flight performance evaluation and optimisation Open
The SESAR2020 exploratory research (ER4) programme CREATE (Grant 890898) developed a climate and weather aware Concept of Operations (ConOps) which encompasses a multi-aircraft 4D trajectory optimisation framework, which utilises a CO 2 an…
View article: Interacting Multiple Model Filtering for Aircraft Guidance Modes Identification from Surveillance Data
Interacting Multiple Model Filtering for Aircraft Guidance Modes Identification from Surveillance Data Open
Accurate and reliable trajectory prediction (TP) is required in several air traffic management systems. Estimating the aircraft trajectory in a vertical plane typically requires the knowledge of a pair of operational instructions. A sequen…
View article: NOSTROMO: Lessons learned, conclusions and way forward
NOSTROMO: Lessons learned, conclusions and way forward Open
This White Paper sets out to explain the value that metamodelling can bring to air traffic management (ATM) research. It will define metamodelling and explore what it can, and cannot, do. The reader is assumed to have basic knowledge of SE…
View article: CO2 and non-CO2 balanced Environmental Scores Module for flight performance evaluation and optimisation
CO2 and non-CO2 balanced Environmental Scores Module for flight performance evaluation and optimisation Open
The SESAR2020 exploratory research (ER4) programme CREATE (Grant 890898) developed a climate and weather aware Concept of Operations (ConOps) which encompasses a multi-aircraft 4D trajectory optimisation framework, which utilises a CO2 and…
View article: Computing optimal trajectories for light soaring aircraft using Fast Marching Tree Star
Computing optimal trajectories for light soaring aircraft using Fast Marching Tree Star Open
In the last couple of years, performances of light soaring aircraft (para gliders, hang gliders, or light sailplanes) have increased significantly, allowing pilots to fly great distances using only the convective energy of the atmosphere. …
View article: Time-based-fuel-efficient aircraft descents: Thrust-idle descents along re-negotiated routes vs. powered descents along published routes
Time-based-fuel-efficient aircraft descents: Thrust-idle descents along re-negotiated routes vs. powered descents along published routes Open
We address the situation where required times of arrival (RTAs) are assigned outside the feasible time window that allows aircraft to fly energy-neutral continuous descent operations (CDOs). Two strategies to achieve these RTAs are compare…
View article: Alternative 4D Trajectories for the avoidance of weather- and contrail-sensitive volumes
Alternative 4D Trajectories for the avoidance of weather- and contrail-sensitive volumes Open
We present a framework to generate, in a multi- aircraft environment, 4D optimized trajectories in a scenario with several weather constraints obtained with advanced weather prediction models. We focus on the trajectory optimization module…
View article: An Automated Emergency Airport and Off-Airport Landing Site Selector
An Automated Emergency Airport and Off-Airport Landing Site Selector Open
We present a novel landing site selector capable of selecting suitable landing sites (airport and off-airport) for emergency landings. In a first step, information from several databases which includes, for instance, elevation data, is gat…
View article: In-flight cost index optimisation upon weather forecast updates
In-flight cost index optimisation upon weather forecast updates Open
This paper presents an optimisation framework to compute the altitude and speed profiles of a trajectory in the execution phase of the flight, such that the expected total cost (ETC) of the operation is minimised (i.e., modelling the expec…
View article: Optimal Path Planning for Soaring Flight
Optimal Path Planning for Soaring Flight Open
International audience
View article: An automated emergency airport and off-airport landing site selector
An automated emergency airport and off-airport landing site selector Open
We present a novel landing site selector capable of selecting suitable landing sites (airport and off-airport) for emergency landings. In a first step, information from several databases which includes, for instance, elevation data, is gat…
View article: Sensitivity-Based Non-Linear Model Predictive Control for Aircraft Descent Operations Subject to Time Constraints
Sensitivity-Based Non-Linear Model Predictive Control for Aircraft Descent Operations Subject to Time Constraints Open
The ability to meet a controlled time of arrival while also flying a continuous descent operation will enable environmentally friendly and fuel efficient descent operations while simultaneously maintaining airport throughput. Previous work…
View article: Automated sequencing and merging with dynamic aircraft arrival routes and speed management for continuous descent operations
Automated sequencing and merging with dynamic aircraft arrival routes and speed management for continuous descent operations Open
In this paper, we present a novel methodology to manage arrival traffic in terminal airspace. We define two areas around the airport, aiming to efficiently schedule incoming traffic. A four-dimensional (4D) trajectory negotiation/synchroni…
View article: Generation of Emergency Trajectories Based on Aircraft Trajectory Prediction
Generation of Emergency Trajectories Based on Aircraft Trajectory Prediction Open
We present an automated emergency trajectory generator to compute the best emergency trajectory for a given landing site. A given emergency 2-dimensional (2D) path (i.e., route) is used as input for a trajectory predictor (TP), which compu…
View article: Generation of Emergency Trajectories Based on Aircraft Trajectory Prediction
Generation of Emergency Trajectories Based on Aircraft Trajectory Prediction Open
We present an automated emergency trajectory generator to compute the best emergency trajectory for a given landing site. A given emergency 2-dimensional (2D) path (i.e., route) is used as input for a trajectory predictor (TP), which compu…
View article: A Fast and Flexible Emergency Trajectory Generator
A Fast and Flexible Emergency Trajectory Generator Open
We present an automated emergency trajectory generator to compute the best emergency trajectory for a given landing site. A combination of the optimized version of the rapidly exploring random tree algorithm and Dubins paths is used to com…
View article: MULTI-AIRCRAFT ENVIRONMENTALLY-SCORED WEATHER- RESILIENT OPTIMISED 4D-TRAJECTORIES
MULTI-AIRCRAFT ENVIRONMENTALLY-SCORED WEATHER- RESILIENT OPTIMISED 4D-TRAJECTORIES Open
Weather phenomena are one of the biggest causes for significant delays and unpredictable disruptions within air traffic management (ATM) network operations. The changing global climate increases the future severity and frequency of these a…
View article: Sensitivity Analysis of Maximum Circulation of Wake Vortex Encountered by En-Route Aircraft
Sensitivity Analysis of Maximum Circulation of Wake Vortex Encountered by En-Route Aircraft Open
Wake vortex encounters (WVE) can pose significant hazard for en-route aircraft. We studied the sensitivity of wake vortex (WV) circulation and decay to aircraft mass, altitude, velocity, density, time of catastrophic wake demise event, edd…
View article: Fast-Time Demand-Capacity Balancing Optimizer for Collaborative Air Traffic Flow Management
Fast-Time Demand-Capacity Balancing Optimizer for Collaborative Air Traffic Flow Management Open
This paper builds on top of a collaborative ATFM framework previously published, which demonstrated a potential in significant pre-tactical system delay reduction over the current European ATFM practices. In this paper, we aim to raise the…