Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Niek Doelman"'
Publikováno v:
Monthly Notices of the RAS (0035-8711), 499(2), 2817-2825
Dedicated transiting surveys, such as the Kepler space telescope, have provided the astronomy community with a rich data set resulting in many new discoveries. In this paper, we look at eight Kepler objects identified by Wheeler & Kipping with a peri
Autor:
Rudolf Saathof, Clara I. Osorio Tamayo, W. Klop, Michael Gruber, T.M.N. Moens, Niek Doelman, C. M. Duque
Publikováno v:
International Conference on Space Optics — ICSO 2020.
Free space optical (FSO) satellite communications has very attractive properties for Quantum Key Distribution (QKD). The quantum channel loss and noise are major factors in setting the maximum achievable secure key rate of QKD systems. Primarily for
Publikováno v:
Astronomy & Astrophysics, 636, A81
Astronomy and Astrophysics, 636
Astronomy and Astrophysics, 636
Context. For high-contrast imaging systems, such as VLT/SPHERE, the performance of the system at small angular separations is contaminated by the wind-driven halo in the science image. This halo is a result of the servo-lag error in the adaptive opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53f8f00c843820b320bf3d4b4fbdb437
http://arxiv.org/abs/2003.10225
http://arxiv.org/abs/2003.10225
Autor:
Jochem B. Lutgerink, Wim C. Korevaar, Fabrizio Silvestri, Jeroen J. Boschma, C. M. Duque, Niek Doelman, Geerten Frans Ijsbrand Kramer, Federico Pettazzi, Martin Eschen, Remco den Breeje
Publikováno v:
Free-Space Laser Communications XXXII.
Optical satellite communication is growing fast and among various applications it requires higher throughput optical feeder links. Optical feeder links for satellite communication necessitate very high data throughput, up to 1 Terabit/s and beyond. A
Autor:
Niek Doelman
Publikováno v:
Monthly Notices of the RAS (0035-8711), 491(4), 4719-4723
An analytical expression is given for the minimum of the time-delay induced wavefront error (also known as the servo-lag error) in Adaptive Optics systems under temporal prediction filtering. The analysis is based on the von K\'arm\'an model for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69f160a7deb94360176b032379dae598
https://ui.adsabs.harvard.edu/abs/2019MNRAS.tmp.2825D
https://ui.adsabs.harvard.edu/abs/2019MNRAS.tmp.2825D
Autor:
Gert Witvoet, R. den Breeje, Rudolf Saathof, C.W. Korevaar, W.E. Crowcombe, N. van der Heiden, M. Dresscher, Erik Fritz, H. de Man, Stefan Kuiper, N. C. J. van der Valk, Niek Doelman, Jet Human, C. M. Duque, T.J. de Lange
Publikováno v:
IEEE International Conference on Space Optical Systems and Applications, ICSOS 2019, 14-16 October 2019, Portland, OR, USA
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 orbi
Autor:
Matthias Richerzhagen, Ivan Ferrario, Niek Doelman, W. Klop, Rudolf Saathof, T.M.N. Moens, Remco den Breeje, Juraj Poliak, Tjeerd Russchenberg, Federico Pettazzi, Ricardo Barrios, Jet Human, J. Michael Gruber, Ramon Mata Calvo
Publikováno v:
International Conference on Space Optics — ICSO 2018.
For the next generation of very high throughput communication satellites, TNO and DLR envision optical free-space communication between ground stations and geostationary telecommunication satellites to replace the traditional RF links. To mitigate at
Publikováno v:
Journal of the Optical Society of America A
Journal of the Optical Society of America A: Optics and Image Science, and Vision, 5, 36, 731-740
Journal of the Optical Society of America A, 36(5), 731-740. OPTICAL SOC AMER
Journal of the Optical Society of America A: Optics and Image Science, and Vision, 5, 36, 731-740
Journal of the Optical Society of America A, 36(5), 731-740. OPTICAL SOC AMER
For high contrast imaging systems, the time delay is one of the major limiting factors for the performance of the extreme adaptive optics (AO) sub-system and, in turn, the final contrast. The time delay is due to the finite time needed to measure the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f934999a117d6b83a6f2c46f3c9543db
https://hdl.handle.net/1887/83275
https://hdl.handle.net/1887/83275
Autor:
Federico Pettazzi, Tjeerd Russchenberg, Matthias Richerzhagen, Jet Human, Niek Doelman, Ivan Ferrario, Ramon Mata Calvo, T.M.N. Moens, Remco den Breeje, Juraj Poliak, Ricardo Barrios, Rudolf Saathof, W. Klop, Michael Gruber
For the next generation of very high throughput communication satellites, free-space optical (FSO) communication between ground stations and geostationary telecommunication satellites is likely to replace conventional RF links. To mitigate atmospheri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19f2723c8a1dd6f306115729478b21ef
https://elib.dlr.de/126954/
https://elib.dlr.de/126954/
Publikováno v:
Adaptive Optics Systems VI.
Direct imaging of exoplanets requires overcoming the enormous contrast between the exoplanet and its host star, to distinguish the reflected light from the exoplanet, from the diffracted light of the star. Direct optimization of contrast, using nonli