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Ribeiro, M.J. (author)Increasing delays and congestion reported in many aviation sectors indicate that the current centralised operational model is rapidly approaching saturation levels. Air Traffic Control (ATC) system is not expected to keep pace with the ever-increasing demand for air transportation. Its capacity is still limited by the available controllers, and...doctoral thesis 2023
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Patrinopoulou, Niki (author), Daramouskas, Ioannis (author), Badea, Calin Andrei (author), Morfin Veytia, A. (author), Lappas, Vaios (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Kostopoulos, Vassilios (author)Unmanned Aircraft Systems (UAS) Traffic Management (UTM) is an active research subject as its proposed applications are increasing. UTM aims to enable a variety of UAS operations, including package delivery, infrastructure inspection, and emergency missions. That creates the need for extensive research on how to incorporate such traffic, as...journal article 2023
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Morfin Veytia, A. (author), Badea, C. (author), Patrinopoulou, Niki (author), Daramouskas, Ioannis (author), Ellerbroek, Joost (author), Lappas, Vaios (author), Kostopoulos, Vassilios (author), Hoekstra, J.M. (author)The interest in urban air mobility as a potential solution for urban congestion is steadily growing. Air operations in urban areas can present added complexity as compared with traditional air traffic management. As a result, it is necessary to test and develop novel airspace designs and rules. As airspace in urban areas is a scarce resource,...journal article 2023
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Badea, C. (author), Morfin Veytia, A. (author), Patrinopoulou, Niki (author), Daramouskas, Ioannis (author), Ellerbroek, Joost (author), Lappas, Vaios (author), Kostopoulos, Vassilios (author), Hoekstra, J.M. (author)The use of small aircraft for a wide range of missions in urban airspace is expected to increase in the future. In Europe, efforts have been invested into developing a unified system, called U-space, to manage aircraft in dense very-low-level urban airspace. The Metropolis II project aimed to research what degree of centralisation an air traffic...journal article 2023
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Giliam, Michiel (author)In order to enable the safe and efficient integration of Unmanned Aerial Vehicles into very low level airspace, modern day research focuses on the development of new traffic services and procedures. One of these is the geovectoring protocol, which aims to reduce traffic complexity by setting limits on the allowed ground speed, course, and...master thesis 2022
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Doole, M.M. (author)The paradigm of large-scale adoption of autonomous drone delivery promises to provide commercial and societal benefits. Over the past years, several companies have investigated the use-case of drones to transport small express packages of fast-food meals and time-sensitive medical supplies. The latter has shown to be highly beneficial in many...doctoral thesis 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Future operations involving drones are expected to result in traffic densities that are orders of magnitude higher than any observed in manned aviation. Current geometric conflict resolution (CR) methods have proven to be very efficient at relatively moderate densities. However, at higher densities, performance is hindered by the...journal article 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Current predictions on future drone operations estimate that traffic density orders of magnitude will be higher than any observed in manned aviation. Such densities redirect the focus towards elements that can decrease conflict rate and severity, with special emphasis on airspace structures, an element that has been overlooked within...journal article 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Current predictions for future operations with drones estimate traffic densities orders of magnitude higher than any observed in manned aviation. Such densities call for further research and innovation, in particular, into conflict detection and resolution without the need for human intervention. The layered airspace concept, where aircraft...journal article 2022
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Patrinopoulou, N. (author), Daramouskas, I. (author), Lappas, V. (author), Morfin Veytia, A. (author), Badea, C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), De Vries, V. (author), Van Ham, J. (author)Metropolis II aims to provide insights in what is needed to enable high-density urban air operations. It does this by investigating the foundation for U-space U3/U4 services. The final goal is to provide a unified approach for strategic deconfliction, tactical deconfliction, and dynamic capacity management. Highly-dense operations in...conference paper 2022
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Vlaskin, A. (author), Sun, Junzi (author), Hoekstra, J.M. (author)The consumer drone sector is expected to grow rapidly in the coming decades. In Europe alone, some predictions show as many as seven million drones will be flying by 2050. This poses a challenge for surveillance. In this paper, we study an Automatic Dependent Surveillance system concept similar to the one for current aircraft surveillance, which...conference paper 2022
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Morfin Veytia, A. (author), Badea, C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Patrinopoulou, N. (author), Daramouskas, I. (author), Lappas, V. (author), Kostopoulos, Vassilis (author), de Vries, Vincent (author)The Metropolis II project aimed to study the impact of centralised separation management for urban aerial mobility. Three concepts were developed in this study: a fully centralised, strategically separated concept, a hybrid concept featuring cen- tralised strategic separation and distributed tactical separation, and a fully distributed tactical...conference paper 2022
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van Aken, Daan (author)The expected increase in unmanned aerial vehicle (UAV) traffic in European airspace raises concerns regarding the human factors of tower controllers. Dynamic geofences offer tower control a means to safely separate UAVs from manned traffic, without direct interactions with individual UAVs. A preliminary support interface was designed, supporting...master thesis 2021
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Badea, C. (author), Morfin Veytia, A. (author), Ribeiro, M.J. (author), Doole, M.M. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author)Road traffic delay and urban overcrowding are increasing rapidly all over the world. As a result, several companies have proposed the use of small unmanned aerial vehicles (sUAVs) as an alternative to road-based transportation. These small autonomous drones are expected to operate within a thin airspace band (Very Low Level) in high traffic...conference paper 2021
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Hoekstra, J.M. (author), Ellerbroek, J. (author)Purpose of Review A lot of research into decentralised, state-based conflict detection and resolution, or detect and avoid algorithms has been executed. This paper explains the essential properties of state-based conflict detection and reviews the work in the context of applications for not only manned but also unmanned aerial vehicles, where...journal article 2021
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Doole, M.M. (author), Ellerbroek, Joost (author), Knoop, V.L. (author), Hoekstra, J.M. (author)Large-scale adoption of drone-based delivery in urban areas promise societal benefits with respect to emissions and on-ground traffic congestion, as well as potential cost savings for drone-based logistic companies. However, for this to materialise, the ability of accommodating high volumes of drone traffic in an urban airspace is one of the...journal article 2021
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Current investigations into urban aerial mobility, as well as the continuing growth of global air transportation, have renewed interest in conflict detection and resolution (CD&R) methods. The use of drones for applications such as package delivery, would result in traffic densities that are orders of magnitude higher than those currently...journal article 2021
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Sun, Junzi (author), Sunil, Emmanuel (author), Koerse, Ralph (author), van Selling, Stijn (author), van Doorn, Jan-Willem (author), Brinkman, Thomas (author)The METeo Sensors in the Sky (METSIS) project, funded by SESAR’s Engage knowledge transfer network, investigated the use of drones as an aerial wind sensor network for U-space applications. The concept aims to provide accurate, lowcost and hyperlocal wind nowcasts for drones using data collected by drones themselves and the Meteo-Particle Model ...conference paper 2021
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Castino, F. (author), Yin, F. (author), Grewe, V. (author), Soler, Manuel (author), Simorgh, Abolfazl (author), Yamashita, Hiroshi (author), Matthes, Sigrun (author), Baumann, Sabine (author), Linke, Florian (author)Air traffic contributes to global warming through CO2 and non-CO2 effects, including the impact of NOx emissions on atmospheric ozone and methane, formation of contrails, and changes in the amount of stratospheric water vapour. The climate impact of non-CO2 effects is highly dependent on the background atmospheric conditions at the time and...conference paper 2021
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Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Driven by rising consumer demand, interest is growing in the application of autonomous unmanned aerial vehicles (drones) for the last-mile delivery of small express packages and fast-food meals in cities. To be realised, this would require the Very Low Level (VLL) urban airspace to be able to cope with high traffic densities of commercial...journal article 2020
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