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Langejan, T.P. (author), Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Most Free-Flight concepts rely on self-separation by means of airborne Conflict Detection and Resolution (CD&R) algorithms. A key enabling technology for airborne CD&R is the Automatic Dependent Surveillance-Broadcast (ADS-B) system, which is used for direct state information exchange between aircraft. Similar to other communication...
conference paper 2016
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Jenie, Y.I. (author), van Kampen, E. (author), de Visser, C.C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
conference paper 2016
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Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Maas, J.B. (author)
In the context of decentralized separation, airspace stability pertains to the propagation of con?ict chain reactions as a result of tactical con?ict resolution maneuvers. This notion of airspace stability has been used in previous literature to develop a semi-empirical method for determining the capacity of a decentralized direct-routing...
conference paper 2017
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Tra, M.A.P. (author), Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Maas, J.B. (author)
Previous research relating airspace structure and ca-pacity has shown that a decentralized layered airspace concept, in which each altitude band limited horizontal travel to within a prede?ned heading range, improved safety when compared to unstructured airspace. However, the extent of the safety bene?ts of such layered airspace designs were not...
conference paper 2017
document
Verbraak, T.L. (author), Ellerbroek, Joost (author), Sun, Junzi (author), Hoekstra, J.M. (author)
To investigate the contradicting findings of previous studies that investigated ADS-B quality, a study was per-formed to analyze the data and signal quality of ADS-B. For this study, a large dataset of raw ADS-B messages was analyzed, regarding the quality of the data and the signal, differentiating between internal and external sources of...
conference paper 2017
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Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Aircraft mass is a crucial piece of information for studies on aircraft performance, trajectory prediction, and many other ATM topics. However, it is a common challenge for researchers who have no access to this proprietary information. Previously, several studies have proposed methods to estimates aircraft weight, most of which are focused on...
conference paper 2017
document
Vanwelsenaere, A.J.G. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Westerveld, E (author)
The occurrence of pop-up flights negatively affects the (extended) arrival manager. This issue is known already for a long time by operational experts, but the extent thereof has now been assessed during experiments. An arrival manager research model was developed and integrated in BlueSky, an open-source air traffic management simulator. Fast...
conference paper 2017
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Sun, Junzi (author), Vû, Huy (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Wind is an important parameter in many air traffic management researches, as it often introduces significant uncertainties in aircraft performance studies and trajectory predictions. Obtaining accurate wind field information has always been a challenge due to the availability of weather sensors. Traditionally, there is no direct method to...
conference paper 2017
document
Metz, I.C. (author), Ellerbroek, Joost (author), Muhlhausen, Thorsten (author), Kügler, D. (author), Hoekstra, J.M. (author)
This paper presents a fast-time simulation environment for assessing the risk of bird strikes in aviation. An existing air traffic simulator was enhanced in order to simulate air and bird traffic simultaneously and to recognize collisions between birds and aircraft. Furthermore, a method was developed to generate bird movement information from...
conference paper 2017
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Hoekstra, J.S.C.M. (author), Gentili, M. (author)
In recent years, the housing market of Amsterdam, traditionally known for its large share of social rental dwellings, experienced a trend of commodification and financialization. Due to its central position and good facilities, the Dutch capital has become very popular among both home seekers and investors.
conference paper 2023
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Croon, T.M. (author), Hoekstra, J.S.C.M. (author), Dubois, Ute (author)
The European energy crisis of 2022 stresses the importance of protecting the most vulnerable households. Price peaks disproportionally affect households with low incomes, limited savings, and inefficient homes, and increased energy poverty: the inability to secure sufficient domestic energy services that allow for participation in society ...
conference paper 2023
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Rudnyk, I. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
conference paper 2018
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Rudnyk, I. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
conference paper 2018
document
Metz, I.C. (author), Mühlhausen, Thorsten (author), Ellerbroek, Joost (author), Kügler, Dirk (author), Hoekstra, J.M. (author)
This paper presents a collision avoidance algorithm to prevent bird strikes for aircraft departing from an airport. By using trajectory-information of aircraft and birds, the algorithm predicts potential collisions. Collision avoidance is performed by delaying departing aircraft until they can follow a collision-free trajectory. An...
conference paper 2019
document
Sun, Junzi (author), Hoekstra, J.M. (author)
A large quantity of Mode S data is being gathered by the OpenSky receiver network every day. Information regarding common flight states, such as position, ground speed, and the vertical rate is broadcast by ADS-B and has already been decoded and made available for researchers via the OpenSky historical database. However, there is still a...
conference paper 2019
document
Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Mennella, Alberto (author), Onate, Manuel (author)
The work presented in this paper is part of the SESAR Horizon 2020 exploratory research project DREAMS, which analyses operational and technical aspects of drone Aeronautical Information Management (AIM) for Europe’s Unmanned Traffic Management system, U-Space. The main objective of DREAMS is to analyse the present and future needs of...
conference paper 2018
document
Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
The Automatic Dependent Surveillance-Broadcast (ADS-B) data has become one of the most popular sources of data for trajectory-based ATM studies. It is can be received in most of the world without restrictions. Extended coverage can be achieved with a network of low-cost receivers and satellites. However, the fact that ADS-B is designed to...
conference paper 2019
document
Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
In the coming years, aviation will have to cope with an increase in the number of aircraft, and of drones purchased in the open market. The human intervention of Air Traffic Management (ATM) will be overburden with guaranteeing flight safety with hundreds of manned aircraft and Unmanned Aerial Vehicles (UAVs) operating simultaneously. Conflict...
conference paper 2019
document
Sun, Junzi (author), Hoekstra, J.M. (author), Ellerbroek, Joost (author)
The aerodynamic properties of an aircraft determine a crucial part of the aircraft performance model. Deriving accurate aerodynamic coefficients requires detailed knowledge of the aircraft’s design. These designs and parameters are well protected by aircraft manufacturers. They rarely can be used in public research. Very detailed aerodynamic...
conference paper 2018
document
Dodge, Eric (author), Hoekstra, Arjen (author), Stoner, Michael (author)
conference paper 2018
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