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Köhler, J. (author), Jansen, R. (author), Irizar, J. (author), Sohmer, A. (author), Melf, M. (author), Greinacher, R. (author), Erdmann, M. (author), Kirschner, V. (author), Pérez Albiñana, A. (author), Martin, D. (author), de Goeij, B.T.G. (author), Vink, H.J.P. (author), Day, J.P.R. (author), ten Bloemendal, D. (author), Gielesen, W.L.M. (author), de Vreugd, J. (author), van der Laan, L.W. (author), van 't Hof, C.A. (author)Sentinel-5 is an Earth atmospheric monitoring mission developed within the European Union’s Copernicus program. The mission objective is to monitor the composition of the Earth’s atmosphere on a daily basis. Airbus DS GmbH acts as the prime contractor under a European Space Agency contract. The instrument design, development, and the instrument...conference paper 2021
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Jansen, R. (author), Day, J.P.R. (author), Vink, H.J.P. (author), de Vreugd, J. (author), van Beekum, E.R.J. (author), van der Laan, L.W. (author), van 't Hof, A.C.A. (author), Gielesen, W.L.M. (author), Koehler, J. (author)Sentinel-5 is an Earth atmospheric monitoring mission developed within the Copernicus program. The mission objective is to monitor the composition of the Earth's atmosphere on a daily basis. TNO is developing the UV1 spectrometer subsystem as well as the two telescope subsystems. In this paper, the design of the UV1 spectrometer is described and...conference paper 2019
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Burkhardt, M. (author), Rathje, T. (author), Lehr, D. (author), Erdmann, L. (author), Helgert, M. (author), Triebel, P. (author), Diehl, T. (author), Gatto, A. (author), van der Valk, N.C.H. (author), Vink, H.J.P. (author), Jansen, R. (author), Day, J.P.R. (author), Gielesen, W.L.M. (author)The first diffraction gratings on curved substrates were manufactured by employing ruling engines by H.A. Rowland. Due to the ruling principle, these gratings are characterized by equidistant parallel lines if the line pattern is projected along the optical axis onto a tangential plane in the vertex of the grating substrate. The Offner...conference paper 2019
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de Goeij, B.T.G. (author), de Bruijn, D. (author), van der Knaap, F.G.P. (author), Bol, H. (author), Gielesen, W.L.M. (author), Bell, A. (author), Matthews, A. (author), Skipper, M. (author), Hallett, B. (author), Sauer, M. (author), Kruse, K.W. (author), Haas, C. (author), Wallace, K. (author), Heliere, A. (author)The European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA) are co-operating to develop the EarthCARE satellite mission with the fundamental objective of improving the understanding of the processes involving clouds, aerosols and radiation in the Earth's atmosphere. A Cloud Profiling Radar (CPR), an Atmospheric LIDAR (ATLID...conference paper 2018
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Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F. (author), Meijer, E. (author), Braam, B.C. (author)GAIA is a global space astrometry mission, successor to the Hipparcos mission, launched in 1989. The GAIA spacecraft is being built by EADS Astrium France and is scheduled for launch in 2013. At a distance of 1.5 million km from Earth at Lagrangian point L2, slowly spinning around its axis, GAIA will monitor each target star about 100 times over...conference paper 2017
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- Faber, A.J. (author), Cheng, L.K. (author), Gielesen, W.L.M. (author), Boussard-Plédel, C. (author), Maurugeon, S. (author), Bureau, B. (author), Zhang, X.H. (author), Lucas, J. (author), Pereira Do Carmo, J. (author) conference paper 2017
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Faber, A.J. (author), Cheng, L.K. (author), Gielesen, W.L.M. (author), Boussard-Plédel, C. (author), Houizot, P. (author), Danto, S. (author), Lucas, J. (author), Pereira Do Carmo, J. (author)The development of single mode chalcogenide glass fibers as wavefront filter for the DARWIN mission is reported. Melting procedures and different preform techniques for manufacturing core-cladding chalcogenide fibers are described. Bulk glass samples on the basis of Te-As-Se- and high Te-compositions have been characterized optically, by...conference paper 2017
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Mora, A. (author), Biermann, M. (author), Bombrun, A. (author), Boyadjian, J. (author), Chassat, F. (author), Corberand, P. (author), Davidson, M. (author), Doyle, D. (author), Escolar, D. (author), Gielesen, W.L.M. (author), Guilpain, T. (author), Hernandez, J. (author), Kirschner, V. (author), Klioner, S.A. (author), Koeck, C. (author), Laine, B. (author), Lindegren, L. (author), Serpell, E. (author), Tatry, P. (author), Thoral, P. (author)The Gaia all-sky astrometric survey is challenged by several issues affecting the spacecraft stability. Amongst them, we find the focus evolution, straylight and basic angle variations Contrary to pre-launch expectations, the image quality is continuously evolving, during commissioning and the nominal mission. Payload decontaminations and...conference paper 2016
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Chakkalakkal Abdulla, S.M. (author), Cheng, L.K. (author), van den Bosch, B. (author), Dijkhuizen, N. (author), Nieuwland, R.A. (author), Gielesen, W.L.M. (author), Lucas, J. (author), Boussard-Plédel, C. (author), Conseil, C. (author), Bureau, B. (author), do Carmo, J.P. (author)The DARWIN mission aims to detect weak infra-red emission lines from distant orbiting earth-like planets using nulling interferometry. This requires filtering of wavefront errors using single mode waveguides operating at a wavelength range of 6.5-20 μm. This article describes the optical design of the fibers, the manufacturing protocol, the...conference paper 2014
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Mora, A. (author), Biermann, M. (author), Brown, A.G.A. (author), Busonero, D. (author), Carminati, L. (author), Carrasco, J.M. (author), Chassat, F. (author), Erdmann, M. (author), Gielesen, W.L.M. (author), Jordi, C. (author), Katz, D. (author), Kohley, R. (author), Lindegren, L. (author), Loeffler, W. (author), Marchal, O. (author), Panuzzo, P. (author), Seabroke, G. (author), Sahlmann, J. (author), Serpell, E. (author), Serraller, I. (author), van Leeuwen, F. (author), van Reeven, W. (author), van den Dool, T.C. (author), Vosteen, L.L.A. (author)The Gaia payload ensures maximum passive stability using a single material, SiC, for most of its elements. Dedicated metrology instruments are, however, required to carry out two functions: monitoring the basic angle and refocusing the telescope. Two interferometers fed by the same laser are used to measure the basic angle changes at the level...conference paper 2014
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Gielesen, W.L.M. (author)Sinds enkele maanden draait de Ga¡a-satel]¡et van Esa op anderhalf miljoen kilometer van de aarde. Doel is om een zeer nauwkeurige driedimensionale kaart te maken van ongeveer een miljard sterren in ons Melkwegstetsel. Aan boord zijn twee meetsystemen, door TNO ontwikketd en gebouwd, verantwoordelijk voor de nauwkeurigheid waarmee de exacte...article 2014
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Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Mekking, J. (author), Calvel, B. (author), Laborie, A. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author), Monteiro, D. (author)The Gaia mission will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...conference paper 2013
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Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Meijer, E.A. (author), Calvel, B. (author), Laborie, A. (author), Monteiro, D. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author)The Gaia mission1 will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...conference paper 2012
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Gubbels, G.P.H. (author), van Drunen, C. (author), Böhm, G. (author), Arnold, T. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author)TNO Science and Industry has designed and is currently developing the Basic Angle Monitoring Opto-Mechanical Assembly (BAM OMA) [1], which is part of the GAIA spacecraft. In GAIA two telescopes mounted on a slowly spinning satellite will measure the position of the stars with an accuracy much higher as ever done before. Crucial in the system is...conference paper 2010
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TNO Industrie en Techniek (author), van den Dool, T.C. (author), Hamelinck, R.F.M.M. (author), Kruizinga, B. (author), Gielesen, W.L.M. (author), Braam, B.C. (author), Nijenhuis, J.R. (author), Loix, N. (author), Luyckx, S. (author), van Loon, D. (author), Kooijman, P.P. (author), Swinyard, B.M. (author)TNO, together with its partners Micromega and SRON, have designed a cryogenic scanning mechanism for use in the SAFARI Fourier Transform Spectrometer (FTS) on board of the SPICA mission. The optics of the FTS scanning mechanism (FTSM) consists of two back-to-back cat's-eyes. The optics are mounted on a central "back-bone" tube which houses all...conference paper 2010
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TNO Industrie en Techniek (author), Meijer, E.A. (author), Nijenhuis, J.N. (author), Vink, R.J.P. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Coatantiec, C. (author)To measure the relative motions of GAIA's telescopes, the angle between the telescopes is monitored by an all Silicon Carbide Basic Angle Monitoring subsystem (BAM OMA). TNO is developing this metrology system. The stability requirements for this metrology system go into the pico meter and pico radian range. Such accuracies require extreme...conference paper 2009
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TNO Industrie en Techniek (author), Cheng, L.K. (author), Dijkhuizen, N. (author), Nieuwland, R. (author), Faber, A.J. (author), Gielesen, W.L.M. (author), Lucas, J. (author), Boussard-Plédel, C. (author), Houizot, P. (author), Pereira Do Carmo, J. (author)Various space telescope array systems are being considered to investigate other terrestrial planets orbiting around nearby stars in order to find extra-terrestrial life. One of them is the DARWIN mission of the European Space Agency (ESA). The required technology is the nulling interferometer. The challenge of nulling is making the null in the...conference paper 2009
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Houlzot, P. (author), Boussard-Plédel, C. (author), Faber, A.J. (author), Cheng, L.K. (author), Bureau, B. (author), van Nijnatten, P.A. (author), Gielesen, W.L.M. (author), Do Carmo, J.P. (author), Lucas, J. (author), TNO Industrie en Techniek (author)An important measuring technique under study for the DARWIN planet finding mission, is nulling interferometry, enabling the detection of the weak infrared emission lines of an orbiting planet. This technique requires a perfect wavefront of the light beams to be combined in the interferometer. By using a single mode waveguide before detection,...article 2007
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TNO Industrie en Techniek (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Braam, B.C. (author), Loix, N. (author), Kooijman, P.P. (author), Velsink, G. (author), Stockman, Y. (author), Benoit, J. (author), Sève, F. (author)TNO has developed a compact BreadBoard (BB) cryogenic Optical Delay Line (ODL) for use in future space interferometry missions such as ESA's Darwin and NASA's TPF-I. The breadboard delay line is representative of a flight mechanism. The optical design is a two-mirror cat's-eye. A linear guiding system based on magnetic bearings provides...conference paper 2007
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TNO Industrie en Techniek (author), Cheng, L.K. (author), Faber, A.J. (author), Gielesen, W.L.M. (author), Lucas, J. (author), Boussard-Plédel, C. (author), Houizot, P. (author), Do Carmo, J.P. (author)A vital function of the space interferometer foreseen in the DARWIN mission is the so-called "nulling" operation. The challenge of nulling is making the null in the interferometric signal sufficiently deep to cancel the light from the bright star during the collection of light from its surrounding planets. The performance of the nulling is...conference paper 2006
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