Searched for: author%3A%22de+Lange%2C+T.J.%22
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Dirks, B.P.F. (author), Ferrario, I. (author), Le Pera, A. (author), Vito Finocchiaro, D. (author), Desmons, M. (author), de Lange, T.J. (author), de Man, H. (author), Meskers, A.J.H. (author), Morits, J.P.J. (author), Neumann, N.M.P. (author), Saathof, R. (author), Witvoet, G. (author)
Due to the distance limitation of quantum communication via ground-based fibre networks, space-based quantum key distribution (QKD) is a viable solution to extend such networks over continental and, ultimately, over global distances. Compared to Low Earth Orbits (LEO), QKD from a Geostationary Orbit (GEO) offers substantial advantages, such as...
conference paper 2021
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Saathof, R. (author), Meskers, A.J.H. (author), van Kempen, F.C.M. (author), Witvoet, G. (author), Korevaar, C.W. (author), de Lange, T.J. (author), Crowcombe, E.E. (author), Fritz, E.C. (author), van de Pol, M. (author)
Optical satellite communications is a maturing technology to enable word-wide access to high throughput internet. In the past years a lot of effort has been taken to increase the applicability and the TRL of this technology. In collaboration with industry, TNO initiated several developments for space and ground technologies. Many of these...
conference paper 2021
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Dresscher, M. (author), Bertels, E. (author), de Lange, T.J. (author), Rotteveel, J. (author), van der Togt, O.E. (author)
conference paper 2021
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Saathof, R. (author), Kuiper, S. (author), Crowcombe, W.E. (author), de Man, H. (author), de Lange, T.J. (author), van der Valk, N.C.J. (author), Kramer, L. (author), Fritz, E.C. (author)
Optical communications will complement radio frequency (RF) communications in the coming decades to enhance throughput, power efficiency and link security of satellite communication links. To enable optical communications technology for intersatellite links and (bi-directional) ground to satellite links, TNO develops a suite of technologies in...
conference paper 2019
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Human, J.D. (author), Petersson, H.I.M. (author), Ferrario, I. (author), den Breeje, R. (author), Klop, W.A. (author), Pettazzi, F. (author), Silvestri, F. (author), Gruber, J.M. (author), Saathof, R. (author), Moens, T.M.N. (author), Russchenberg, T. (author), de Lange, T.J. (author), Spierdijk, J.P.F. (author), Hazelebach, R.L.M. (author), Kuiper, S. (author), Scheffers, P.I. (author), Korevaar, C.W. (author)
To overcome data rate limitations of RF communication links with satellites, TNO and Airbus Netherlands envision optical free-space communication feeder links for next generation high throughput satellites. This poster presents a feasibility assessment of such links and the technology needed by means of a link budget and a turbulence model of...
other 2019
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Ringers, M. (author), Fritz, E.C. (author), Crowcombe, W.E. (author), de Man, H. (author), de Lange, T.J. (author), Hazelebach, R.L.M. (author), Meskers, A.J.H. (author), Otten, M.P.G. (author), Leemhuis, A.P. (author), Bell, D.A. (author)
HAPS, a station located on an object at an altitude of 20 to 50 km and at a specified, nominal, fixed point relative to the Earth (ITU RR Vol I 1.66a). A HAPS can be a unmanned airplane, a balloon, or an airship. All require electrical power to keep themselves and their payload functional. Since HAPS operate at much lower altitudes than...
other 2019
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de Lange, T.J. (author), de Man, H. (author), de Bruijn, D. (author), Hazelebach, R.L.M. (author), Rijnbeek, R.A. (author), Baeten, M.J.J. (author), Silvestri, F. (author), Human, J.D. (author), Witvoet, G. (author), Crowcombe, W.E. (author)
LEOCAT is an optical head for intersatellite communication currently under development by TNO (ESA ARTES contract). The objective of LEOCAT is to develop a low recurring cost low SWAP (Size Weight and Power) optical head for the optical satellite communication constellation market. The aim of LEOCAT is to achieve a data-rate of 10Gbit/s over a...
other 2019
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Bol, J.C.P. (author), Pettazzi, F. (author), de Man, H. (author), de Lange, T.J. (author), van Werkhoven, W.P. (author), Crowcombe, W.E. (author), Oosterling, J.A.J. (author), Verhoven, R. (author), de Goeje, M.P. (author), Verhofstad, F. (author), Nijkerk, M.D. (author), Gruijters, C. (author), van Neer, S. (author)
To accommodate such a massive satellite constellation with OCT’s, the following key drivers are identified for the space terminals: - Low Size, Weight and Power (SWaP): One of the key advantages of using optical communication wavelengths over RF wavelength is that it allows for highly compact and low power OCT’s. To fully realize this potential,...
other 2019
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Dresscher, M. (author), Human, J.D. (author), Witvoet, G. (author), van der Heiden, N. (author), den Breeje, R. (author), Kuiper, S. (author), Fritz, E.C. (author), Korevaar, C.W. (author), van der Valk, N.C.J. (author), de Lange, T.J. (author), Saathof, R. (author), Doelman, N.J. (author), Crowcombe, W.E. (author), Duque, C.M. (author), de Man, H. (author)
The anticipated capacity benefit of optical satellite communications has triggered a cascade of technology developments. In this paper, we present three such technologies, namely; i). A cube satellite laser terminal (CubeCAT), ii). A lower Earth orbit satellite optical head (LEOCAT) and iii). A calibration and verification test bench for coarse...
conference paper 2019
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Saathof, R. (author), Crowcombe, W.E. (author), Kuiper, S. (author), van der Valk, N.C.J. (author), Pettazzi, F. (author), de Lange, T.J. (author), Kerkhof, P.J. (author), van Riel, M.C.J.M. (author), de Man, H. (author), Truyens, D.C. (author), Ferrario, I. (author)
Optical communications will complement radio frequency (RF) communications in the coming decades to enhance throughput, power efficiency and link security of satellite communication links. To enable optical communications technology for intersatellite links and (bi-directional) ground to satellite links, TNO develops a suite of technologies in...
conference paper 2018
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Saathof, R. (author), den Breeje, R. (author), Klop, W.A. (author), Kuiper, S. (author), Doelman, N.J. (author), Pettazzi, F. (author), Vosteen, L.L.A. (author), Wildschut, J.A. (author), de Lange, T.J. (author), Moens, T.M.N. (author), Koster, S.E. (author), Gruber, J.M. (author), Spierdijk, J.P.F. (author), Kerkhof, P.J. (author), Russchenberg, T. (author), Truyens, D.C. (author), Crowcombe, W.E. (author), Human, J.D. (author), Mata Calvo, R. (author), Poliak, J. (author), Barrios, R. (author), Scalise, S. (author), Ferrario, I. (author)
TNO and DLR envision optical free-space communication between ground stations and geostationary telecommunication satellites to replace the traditional RF links for the next generation of Very High Throughput Satellites. To mitigate atmospheric turbulence, an Adaptive Optics (AO) system will be used. TNO and DLR are developing breadboards to...
conference paper 2018
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Eijk, A. (author), de Lange, T.J. (author), de Vreugd, J. (author), Slis, E.J.P. (author)
Reciprocating compressors generate vibrations caused by pulsation-induced forces, mechanical (unbalanced) free forces and moments, crosshead guide forces and cylinder stretch forces. The traditional way of mitigating the vibration and cyclic stress levels to avoid fatigue failure of parts of the reciprocating compressor system (piping,...
conference paper 2016
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Herfst, R.W. (author), Dekker, A. (author), Witvoet, G. (author), Crowcombe, W.E. (author), de Lange, T.J. (author), Sadeghian Marnani, H. (author)
One of the major limitations in the speed of the atomic force microscope (AFM) is the bandwidth of the mechanical scanning stage, especially in the vertical (z) direction. According to the design principles of “light and stiff” and “static determinacy,” the bandwidth of the mechanical scanner is limited by the first eigenfrequency of the AFM...
article 2015
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Energieonderzoek Centrum Nederland (author), Lako, P. (author), Menkveld, M. (author), Jeeninga, H. (author), de Lange, T.J. (author), Beurskens, L.W.M. (author), van Thuijl, E. (author), de Coninck, H.C. (author), Martinus, G.H. (author), van de. Zwaan, B.C.C. (author)
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report 2004
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van Arkel, W.G. (author), Uyterlinde, M.A. (author), de Lange, T.J. (author), Schaeffer, G.J. (author), Scheepers, M.J.J. (author), Bruijn, A.J. (author), Sijm, J.P.M. (author), Kets, A. (author), van Werven, M.J.N. (author)
ECN is not only active in technological research and development; it also plays a major role in policy research and development. Since national energy policy is increasingly influenced by developments at the European level and vice versa, ECN is shifting its attention from a national to a European focus. More and more, national energy and...
other 2004
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Energieonderzoek Centrum Nederland (author), Uyterlinde, M.A. (author), de Lange, T.J. (author), van Dijk, A.L. (author), Boots, M.G. (author), Kaal, M.B.T. (author), van Sambeek, E.J.W. (author), Beurskens, L.W.M. (author)
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report 2003
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Energieonderzoek Centrum Nederland (author), de Lange, T.J. (author), van Sambeek, E.J.W. (author), Ruijgrok, W.J.A. (author), Pfeiffer, E.A. (author)
On assignment of the Dutch Ministry of Economic Affairs ECN and KEMAhave researched the cost of renewable electricity sources and technologies. This research provides the inputs for the calculation of the subsidy levels for different categories of renewable electricity, in the framework of the feed-in premium system in the Netherlands called MEP...
report 2003
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Energieonderzoek Centrum Nederland (author), de Lange, T.J. (author), van Sambeek, E.J.W. (author), Ruijgrok, W.J.A. (author), Pfeiffer, E.A. (author)
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report 2003
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de Lange, T.J. (author), Scheepers, M.J.J. (author), de Noord, M. (author), Boots, M.G. (author), Rijkers, F.A.M. (author), Kaal, M.B.T. (author), van Sambeek, E.J.W. (author), Wals, A.F. (author)
Energy Market Trends in the Netherlands 2001 satisfies a need for anoverview of information for a broad spectrum of people interested in the Dutch energy market.Information about developments in the energy market is presented in two ways in each part. Factual information about developments in the energy market is presented in Overview. After...
other 2001
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Energieonderzoek Centrum Nederland (author), Tool, C.J.J. (author), Lako, P. (author), van Roosmalen, J.A.M. (author), de Lange, T.J. (author), Groenendaal, B.J. (author), d. Wild - Scholten, M.J. (author)
The differences in Significance and Status of 15 factors that might be ofdecisive influence in achieving a large-scale market introduction of grid-connected photovoltaic (PV) systems are analyzed. As a research method the opinions of PV experts and persons involved in the implementation of PV have been surveyed. A questionnaire was sent to about...
report 2000
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