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Speirs, Peter, J. (author), Schoder, Arne (author), Renker, Matthias (author), Wellig, Peter (author), Murk, Axel (author)
Whilst for some applications sample measurements of unmanned aerial vehicle (UAV) micro- Doppler signatures will be sufficient, it is also important to also be able to simulate such signatures. This can be done at differing levels of complexity: from simple analytic consideration of the combined scattering from idealised rotating blades, through...
conference paper 2018
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Jahangir, Mohammed (author)
Non-cooperative surveillance of drones is an important consideration in the EU SESAR vision for the provision of U-SPACE services. Aveillant Gamekeeper multiple staring radar utilises extended dwell to be able to detect small drones at the range of several kilometres. However, target discrimination is necessary with such surveillance system as...
conference paper 2018
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Faes, Bram (author)
Clutter introduced by wind turbines has a huge influence on the performance of PSR (primary surveillance radars) systems. The ever-increasing amount of wind turbines, calls for a mitigation technique which minimizes the performance degradation of the system in these high clutter areas. Due to the complexity of the concept, and the large number...
conference paper 2018
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de Wit, Jacco (author), Harmanny, Ronny (author)
Radars for air and surface picture compilation are very good at detection, localization and tracking of objects in a large volume. For identification and classification however, other means are necessary, like transponders on-board airborne and surface platforms. If those are not available, Non-Cooperative Target Recognition (NCTR) techniques...
conference paper 2018
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van der Meer, Rob (author), Hamminga, Siete (author)
Wind turbines pose several potential risks for birds: loss of habitat, the barrier effect and most importantly collision-related mortality. Due to the increasing demand for the construction of wind farms, mitigating the risks of bird mortality is needed. This, in practice, requires collecting vast amounts of data on bird flight directions,...
conference paper 2018
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Theil, Arne (author)
Most modern primary radar systems used for compilation of the air picture are nowadays claimed to be ‘wind-turbine robust’. An overview is given of the various techniques that are applied in these latest generation systems to obtain this robustness. It appears that the main driver that enables the applicability of such techniques is increased...
conference paper 2018
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Bentum, Mark (author), van Kappellen, Wim (author), Brentjens, Michiel (author)
The LOw Frequency ARray (LOFAR} – developed by ASTRON, the Netherlands Institute for Radio Astronomy – is the world’s largest and most sensitive low-frequency radio telescope. It is a network of geographically distributed antenna stations, each containing hundreds of 'low-band’ (LBA} and 'high-band’ (HBA) dipole antennas. LOFAR stretches across...
conference paper 2018
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The global needs in the development of ecologically friendly renewable sources of energy results nowadays in increasing number of wind turbines, which convert the wind energy into electricity. Efficient conversion requires that the scale of turbine's construction has to be in the order of hundred meters, resulting in big linear velocities of...
conference 2018
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Savage, Vince (author)
QinetiQ has investigated the topic of wind farm radar interference since for over 15 years, undertaking research activities and providing consultancy services. Principles of radar cross-section (RCS) reduction using stealth technologies are discussed. The strengths and weaknesses are considered in the context of other mitigation approaches. The...
conference paper 2018
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Isom, Bradley (author)
Wind turbine clutter (WTC) is a difficult-to-mitigate form of interference caused by wind turbines that can appear on radars. The dynamic nature of the clutter means it occupies the same Doppler/frequency domain as is typical with atmospheric or moving target returns, and normal stationary clutter filtering techniques do not apply. While WTC has...
conference paper 2018
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Bentum, Mark (author), van Kappellen, Wim (author), Brentjens, Michiel (author)
The LOw Frequency ARray (LOFAR} – developed by ASTRON, the Netherlands Institute for Radio Astronomy – is the world’s largest and most sensitive low-frequency radio telescope. It is a network of geographically distributed antenna stations, each containing hundreds of 'low-band’ (LBA} and 'high-band’ (HBA) dipole antennas. LOFAR stretches across...
conference paper 2018
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Yin, Jiapeng (author), Unal, Christine (author), Russchenberg, Herman (author)
Nowadays, there is an intensive use of wind turbines worldwide to generate green and renewable energy. In addition, the sizes of wind turbines keep increasing for higher efficiency. However, echoes from wind turbines are severe clutter for weather radar, deteriorating its performance significantly. In this work, the spectral polarimetric filters...
conference paper 2018
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Weinmann, Frank (author), Wald, Stefan O. (author), Knott, Peter (author)
This paper highlights the application and performance of Computational Electromagnetics (CEM) approaches to the simulation of EM effects caused by rotating wind turbines, and compares the benefits and drawbacks of the different methods. In most of the relevant cases, a wind turbine is an electrically very large target, which is too large for EM...
conference paper 2018
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Schrader, Thorsten (author), Bredemeyer, Jocchen (author), Mihalachi, Marius (author), Kleine-Ostmann, Thomas (author)
The project WERAN aimed to determine the interaction of wind turbines (WT) with signals of terrestrial navigation systems such as VHF omnidirectional radio ranges (VOR) and RADAR. One of the main goals of the project was to quantify the additional VOR bearing error caused by wind turbines by means of measurement and numerical simulations. In...
conference paper 2018
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Wasserzier, Christoph (author)
Noise Radar Technology {NRT) has a very strong feature: as its waveform is an un-periodic signal, NRT faces the absence of any ambiguities in range domain. In contrast to in linear frequency modulated waveforms there is no Range-Doppler coupling in NRT. Both characteristics offer great opportunities for measuring moving or rotating targets as in...
conference paper 2018
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Bredemeyer, Jochen (author), Schrader, Thorsten (author), Mihalachi, Marius (author)
In the project WERAN it is also aimed to determine the interaction of wind turbines (WT) with radar signals. The evaluate the strength of single a single WT reflecting radar transmissions, measurement campaigns with multicopters (UAS) have been carried out at various radar sites in the L (Air Defense), S (AD and ATC) and C band (Precipitation...
conference paper 2018
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Theil, Arne (author), van Gent, Onno (author)
The Netherlands Organisation for Applied Scientific Research TNO is regularly tasked to perform windfarm-radar impact studies. The requests most often come from windfarm operators in Europe, but studies for an operator based in Australia have also been performed. Referring to terminology introduced by Eurocontrol’s wind-turbine task force (WTTF)...
conference paper 2018
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Dit jaar, 2018, organiseerden we voor het vierde achtereenvolgende jaar de Discussiedagen Sociale Huisvesting, nu in samenwerking tussen het initiatief ‘Vooruit naar de kern’, Platform31 en OTB – onderzoek voor de gebouwde omgeving van de faculteit Bouwkunde, TU Delft. Drie thema’s zijn in de oproep voor de discussiedagen centraal gesteld: -...
conference 2018
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Koutsileou, Stamatina (author), Kouis, Dimitrios (author), Mitrou, Nikolaos (author)
In this paper, we explore the challenges towards the adoption/use of Open Educational Resources (OER) within the Greek Higher Education (HE). To achieve this objective, first we present “Kallipos”, a large-scale open access textbook publishing initiative that was launched in 2013 by the Hellenic Academic Libraries Link (HEAL-Link) consortium....
conference paper 2018
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De Laet, Tinne (author), Broos, Tom (author), van Staalduinen, Jan-Paul (author), Ebner, Martin (author), Leitner, Philipp (author)
This papers focuses on the use of learning dashboards in higher education to foster self-regulated learning and open education. Students in higher education have to evolve to independent and lifelong learners. Actionable feedback during learning that evokes critical self-reflection, helps to set learning goals, and strengthens self-regulation...
conference paper 2018
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