Academic literature on the topic 'Astrometric'

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Journal articles on the topic "Astrometric"

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Klioner, S. A. "Relativistic astrometry and astrometric relativity." Proceedings of the International Astronomical Union 3, S248 (October 2007): 356–62. http://dx.doi.org/10.1017/s174392130801956x.

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AbstractThe interplay between modern astrometry and gravitational physics is very important for the progress in both these fields. Below some threshold of accuracy, Newtonian physics fails to describe observational data and the Einstein's relativity theory must be used to model the data adequately. Many high-accuracy astronomical techniques have already passed this threshold. Moreover, modern astronomical observations cannot be adequately modeled if relativistic effects are considered as small corrections to Newtonian models. The whole way of thinking must be made compatible with relativity: t
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Tubbs, R., N. M. Elias, R. Launhardt, S. Reffert, F. Delplancke, A. Quirrenbach, T. Henning, and D. Queloz. "ESPRI data-reduction strategy and error budget for PRIMA." Proceedings of the International Astronomical Union 3, S248 (October 2007): 132–33. http://dx.doi.org/10.1017/s1743921308018887.

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AbstractThe Exoplanet Search with PRIma (ESPRI) will use the PRIMA dual-feed astrometric capability on the Very Large Telescope Interferometer (VLTI) to perform astrometric detections of extra-solar planets. We present an overview of our data-reduction strategy for achieving 10-μarcsecond accuracy narrow-angle astrometry using the PRIMA instrument. We discuss the error budget for astrometric measurements, and those aspects of our strategy which are designed to minimise the astrometric measurement errors.
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Seidelmann, P. K. "Space Astrometry and the HST Wide Field/Planetary Camera." Symposium - International Astronomical Union 141 (1990): 347–54. http://dx.doi.org/10.1017/s0074180900087040.

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The launch of the Hipparcos spacecraft marked the beginning of space astrometry. Hopefully, this will be followed in the near future by the launch of the Hubble Space Telescope, which is not primarily an astrometric instrument, but has astrometric capabilities which will be described in this paper. In addition, there are plans and proposals for future astrometric spacecraft. These include the launch of a radio antenna, which combined with Earth-based antennae would provide a very, very long base line interferometer (Levy, 1986, 1988). There are proposals for launching optical interferometers,
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Sakai, N. "SYNERGY BETWEEN OPTICAL (GAIA) AND RADIO (VLBI)ASTROMETRIC RESEARCHES." Revista Mexicana de Astronomía y Astrofísica Serie de Conferencias 52 (October 5, 2020): 9–11. http://dx.doi.org/10.22201/ia.14052059p.2020.52.03.

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Optical and radio astrometry have become significant for mapping the Milky Way. We introduce an example of synergy between optical and radio astrometry on a research of the Galactic spiral arms. Kinematics and spatial distribution of star and gas indicate a new and complex picture of the Galactic spiral arms. Synergy of astrometric study at multi-wavelength would be enhanced thanks to future infrared astrometric projects (e.g.,Small Jasmine; GaiaNIR) in 2020-2030s.
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Schilbach, E., Wenjing Jin, M. Crézé, P. D. Hemenway, I. I. Kumkova, I. K. Platais, S. Röser, C. Turon, and J. J. Wang. "Commission 24: Photographic Astrometry: (Astrometrie Photographique)." Transactions of the International Astronomical Union 24, no. 1 (2000): 48–59. http://dx.doi.org/10.1017/s0251107x00002571.

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The scope of scientific interests of about 130 Commission members is much more complex than one may expect from the title of the commission. Besides traditional topics like the compilation of astrometric catalogues and the construction of an inertial reference system, more and more investigations performed by our members have been dedicated to the astrophysical interpretation of observations including among others astrometric data.
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Fey, Alan L. "Limits on Astrometric Accuracy." International Astronomical Union Colloquium 180 (March 2000): 20–28. http://dx.doi.org/10.1017/s0252921100000063.

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AbstractA general overview of the various factors limiting the accuracy to which astrometric observations can be made is presented. Since this is a very broad topic, it is limited primarily to radio astrometry of extragalactic objects.
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Hobbs, David, Berry Holl, Lennart Lindegren, Frédéric Raison, Sergei Klioner та Alexey Butkevich. "Determining PPN γ with Gaia's astrometric core solution". Proceedings of the International Astronomical Union 5, S261 (квітень 2009): 315–19. http://dx.doi.org/10.1017/s1743921309990561.

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AbstractThe ESA space astrometry mission Gaia, due for launch in early 2012, will in addition to its huge output of fundamental astrometric and astrophysical data also provide stringent tests of general relativity. In this paper we present an updated analysis of Gaia's capacity to measure the PPN parameter γ as part of its core astrometric solution. The analysis is based on small-scale astrometric solutions taking into account the simultaneous determination of stellar astrometric parameters and the satellite attitude. In particular, the statistical correlation between PPN γ and the stellar par
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Platais, I., A. L. Fey, S. Frey, S. G. Djorgovski, C. Ducourant, Ž. Ivezić, A. Rest, C. Veillet, R. F. G. Wyse, and N. Zacharias. "Deep Astrometric Standards." Proceedings of the International Astronomical Union 3, S248 (October 2007): 320–23. http://dx.doi.org/10.1017/s1743921308019455.

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AbstractThe advent of next-generation telescopes with very wide fields-of-view creates a need for deep and precise reference frames for astrometric calibrations. The Deep Astrometric Standards (DAS) program is designed to establish such a frame, by providing absolute astrometry at the 5–10 mas level in four 10 deg2 Galactic fields, to a depth of V=25. The source of our basic reference frame is the UCAC2 catalog, significantly improved by additional observations, and new VLBI positions of radio-loud and optically visible QSOs. We describe all the major steps in the construction of the DAS field
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Zhang, Yigong, Jiancheng Wang, Jie Su, Xiangming Cheng, and Zhenjun Zhang. "Astrometric Observations of a Near-Earth Object Using the Image Fusion Technique." Astronomical Journal 162, no. 6 (November 19, 2021): 250. http://dx.doi.org/10.3847/1538-3881/ac2c6f.

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Abstract The precise astrometric observation of small near-Earth objects (NEOs) is an important observational research topic in the astrometric discipline, which greatly promotes multidisciplinary research, such as the origin and evolution of the solar system, the detection and early warning of small NEOs, and deep-space navigation. The characteristics of small NEOs, such as faintness and fast moving speed, restrict the accuracy and precision of their astrometric observations. In the paper, we present a method to improve the accurate and precise astrometric positions of NEOs based on image fus
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Neuhäuser, R., A. Seifahrt, T. Röll, A. Bedalov, and M. Mugrauer. "Detectability of Planets in Wide Binaries by Ground-Based Relative Astrometry with AO." Proceedings of the International Astronomical Union 2, S240 (August 2006): 261–63. http://dx.doi.org/10.1017/s1743921307004139.

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AbstractMany planet candidates have been detected by radial-velocity variations of the primary star; they are planet candidates, because of the unknown orbit inclination. Detection of the wobble in the two other dimensions, to be measured by astrometry, would yield the inclination and, hence, true mass of the companions. We aim to show that planets can be confirmed or discovered in a close visual stellar binary system by measuring the astrometric wobble of the exoplanet host star as a periodic variation of the separation, even from the ground. We test the feasibility with HD 19994, a visual bi
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Dissertations / Theses on the topic "Astrometric"

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O'Mullane, William. "Implementing the Gaia Astrometric Solution." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/83861.

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As is the way with books in general this document is presented in the form of chapters (seven in number) devoted to individual topics relating to the overall topic of Gaia astrometric data processing. We progress logically from the satellite to the equations for the astrometry to the implementation of a software system to process Gaia observations. After this we look at a few key astrophysical issues for Gaia and explain tests which have been carried out, using the implementation, concerning these effects. A few appendices provide additional information. Here an overview paragraph is pro
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Bauer, Christina, of Western Sydney Nepean University, and Faculty of Science and Technology. "Astrometric observations of wide southern double stars." THESIS_FST_XXX_Bauer_C.xml, 1995. http://handle.uws.edu.au:8081/1959.7/251.

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Observations were made of 309 binary systems between RA 17h - 07h and Dec -70 degrees to -60 degrees. The images were calibrated against pairs measured for CCD astometry. Measurements were made of separations, position angles and differential magnitudes. Uncertainties in position angle and separation were 7.8o/p and 0.16 arcseconds respectively. The position angles, separations and differential V magnitudes were compared with WDS figures. It was determined that only 29% _+ 5% of the observed pairs had undergone significant movement since the last previous measurement, which agrees with the res
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Bauer, Christina. "Astrometric observations of wide southern double stars." Thesis, View thesis, 1995. http://handle.uws.edu.au:8081/1959.7/251.

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Observations were made of 309 binary systems between RA 17h - 07h and Dec -70 degrees to -60 degrees. The images were calibrated against pairs measured for CCD astometry. Measurements were made of separations, position angles and differential magnitudes. Uncertainties in position angle and separation were 7.8o/p and 0.16 arcseconds respectively. The position angles, separations and differential V magnitudes were compared with WDS figures. It was determined that only 29% _+ 5% of the observed pairs had undergone significant movement since the last previous measurement, which agrees with the res
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Bauer, Christina. "Astrometric observations of wide southern double stars /." View thesis, 1995. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030827.113613/index.html.

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Pasquato, Ester. "Effects of stellar surface inhomogeneities on astrometric accuracy." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209872.

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Surface brightness asymmetries are a very common feature of stars. Among other effects they cause a difference between the projected centre of mass and the photocentre. The evolution of those surface features makes this difference time-dependent. In some cases the displacement can be a non-negligible fraction of the star radius R, and if R>1 AU, of the parallax. We investigate the impact of surface brightness asymmetries on the Gaia astrometric solution and on the data processing flow. In particular we derive analytical expressions for the change in the derived astrometric parameters for a sin
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Andrei, Alexandre Humberto. "Observed and predicted data in radio astrometric observations." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279145.

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Colavita, Michael Mark. "Atmospheric limitations of a two-color astrometric interferometer." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15223.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.<br>Bibliography: leaves 381-389.<br>by Michael Mark Colavita.<br>Ph.D.
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Huang, Chunsheng. "Design and analysis of the Astrometric Telescope Facility." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/184994.

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The Astrometric Telescope Facility (ATF) is designed to be a space-based facility searching for planets and extra solar planetary systems. In order to be able to positively identify other planetary systems such as Uranus/Neptune-class planets, the ATF is required to be capable of surveying approximately 100 stars within about 10 parsecs of the earth, of measuring a change in the relative position of stars to an accuracy of 10 microarcseconds, and of being stable for about 10 to 20 years. The ATF approach to astrometry is to modulate the intensity on the focal plane of the telescope by a moving
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Eriksson, Urban. "Stellar Surface Structures and the Astrometric Serach for Exoplnaets." Licentiate thesis, Kristianstad University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235229.

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Measuring stellar parallax, position and proper motion is the task of astrometry. With the development of new and much more accurate equipment, different noise sources are likely to affect the very precise measurements made with future instruments. Some of these sources are: stellar surface structures, circumstellar discs, multiplicity and weak microlensing. Also exoplanets may act as a source of perturbation. In this thesis I present an investigation of stellar surface structures as a practical limitation to ultra-high-precision astrometry. The expected effects in different regions of the HR-
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Brannigan, Emma Leigh. "A spectroscopic and spectro-astrometric study of T Tauri stars." Thesis, University of Hertfordshire, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440155.

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Books on the topic "Astrometric"

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Kopal, Zdeněk, and Jürgen Rahe, eds. Astrometric Binaries. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5343-7.

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Eichhorn, Heinrich K., and Robert J. Leacock, eds. Astrometric Techniques. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4676-7.

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Charlie, Sobeck, and Ames Research Center, eds. Astrometric telescope facility.: Preliminary systems definition study. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1987.

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Alfano, Roberto. Astrometria Fotografica: Photographic Astrometry. Genoa, Italy: Genoa Astronomical Observatory, 1988.

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Robertson, Douglas Scott. Geodetic and astrometric measurements with very-long-baseline interferometry. [Rockville, Md.]: U.S. Department of Commerce, National Oceanic and Atmospheric Administratrion, 1985.

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C, Perryman M. A., European Space Agency, and FAST Consortium, eds. The Hipparcos and Tycho catalogues: Astrometric and photometric star catalogues derived from the ESA Hipparcos Space Astrometry Mission. Noordwijk, Netherlands: ESA Publications Division, 1997.

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Nishioka, Kenji. An astrometric facility for planetary detection on the space station. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1987.

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C, Perryman M. A., Leeuwen Floor van 1952-, Guyenne T. D, Royal Greenwich Observatory, and European Space Agency, eds. Future possibilities for astrometry in space: A workshop organised jointly by the Royal Greenwich Observatory and the European Space Agency, Cambridge, UK, 19-21 June 1995. Noordwijk, The Netherlands: European Space Agency, 1995.

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United States. National Aeronautics and Space Administration., ed. Astrometric observations of comets and asteroids and subsequent orbital investigations: Final report. [Washington, D.C.?: National Aeronautics and Space Administration, 1989.

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Marel, H. van der. On the "great circle reduction" in the data analysis for the astrometric satellite Hipparcos. Delft, The Netherlands: Rijkscommissie voor Geodesie, 1988.

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Book chapters on the topic "Astrometric"

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Benedict, G. Fritz. "Astrometric Planets." In Encyclopedia of Astrobiology, 113–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_121.

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Latham, David W. "Astrometric Orbit." In Encyclopedia of Astrobiology, 113. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_122.

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Benedict, G. Fritz, and Nader Haghighipour. "Astrometric Planets." In Encyclopedia of Astrobiology, 192–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_121.

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Latham, David W., and Nader Haghighipour. "Astrometric Orbit." In Encyclopedia of Astrobiology, 191–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_122.

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Colavita, M. M. "Astrometric Techniques." In Planets Outside the Solar System: Theory and Observations, 177–88. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4623-4_13.

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Benedict, G. Fritz, and Nader Haghighipour. "Astrometric Planets." In Encyclopedia of Astrobiology, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-642-27833-4_121-8.

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Benedict, G. Fritz, and Nader Haghighipour. "Astrometric Planets." In Encyclopedia of Astrobiology, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_121-7.

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Latham, David W., and Nader Haghighipour. "Astrometric Orbit." In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_122-3.

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Dommanget, J. "HIPPARCOS Astrometric Binaries." In Astrometric Binaries, 47–63. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5343-7_5.

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Reasenberg, Robert D. "Microarcsecond Astrometric Interferometry." In Astrometric Techniques, 321–30. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4676-7_40.

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Conference papers on the topic "Astrometric"

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Hutter, Donald J. "USNO Astrometric Interferometer." In 1994 Symposium on Astronomical Telescopes & Instrumentation for the 21st Century, edited by James B. Breckinridge. SPIE, 1994. http://dx.doi.org/10.1117/12.177229.

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Horner, Scott D., Marvin E. Germain, Frederick H. Harris, Mark S. Johnson, Kenneth J. Johnston, David G. Monet, Marc A. Murison, et al. "Full-sky Astrometric Mapping Explorer: an optical astrometric survey mission." In Astronomical Telescopes and Instrumentation, edited by James B. Breckinridge and Peter Jakobsen. SPIE, 2000. http://dx.doi.org/10.1117/12.394030.

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Phillips, James D. "Spectrometer for astrometric interferometry." In SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, edited by Robert D. Reasenberg. SPIE, 1995. http://dx.doi.org/10.1117/12.212990.

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Swartz, Raymond. "The SIM astrometric grid." In Astronomical Telescopes and Instrumentation. SPIE, 2003. http://dx.doi.org/10.1117/12.460861.

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Cranney, Jesse, Israel Vaughn, Dionne Haynes, Trevor Mendel, Stephanie Monty, Davide Greggio, David Brodrick, and François Rigaut. "MAVIS: astrometric calibration technique." In Adaptive Optics Systems VIII, edited by Dirk Schmidt, Laura Schreiber, and Elise Vernet. SPIE, 2022. http://dx.doi.org/10.1117/12.2629678.

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Vondrák, J., V. Štefka, Vasile Mioc, Cristiana Dumitrache, and Nedelia A. Popescu. "Combination of space- and ground-based astrometric observations to create astrometric catalogs." In EXPLORING THE SOLAR SYSTEM AND THE UNIVERSE. AIP, 2008. http://dx.doi.org/10.1063/1.2993626.

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Busonero, Deborah. "Astrometric instrument modeling in the context of Gaia astrometric verification: tasks and activities." In SPIE Astronomical Telescopes + Instrumentation, edited by George Z. Angeli and Philippe Dierickx. SPIE, 2012. http://dx.doi.org/10.1117/12.926703.

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Wiramihardja, S. D., M. I. Arifyanto, Y. Sugianto, C. Kunjaya, Manuel de León, D. M. de Diego, and R. M. Ros. "Astrometric Study of Lo 1339." In MATHEMATICS AND ASTRONOMY: A JOINT LONG JOURNEY: Proceedings of the International Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3506078.

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Phillips, James D., Robert W. Babcock, Marc A. Murison, Robert D. Reasenberg, Allen J. Bronowicki, Milton H. Gran, Charles F. Lillie, William McKinley, and Robert J. Zielinski. "Newcomb: a small astrometric interferometer." In SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, edited by Robert D. Reasenberg. SPIE, 1995. http://dx.doi.org/10.1117/12.212993.

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Korsch, Dietrich. "Design Optimization Of Astrometric Reflectors." In SPIE 1989 Technical Symposium on Aerospace Sensing, edited by Dietrich G. Korsch. SPIE, 1989. http://dx.doi.org/10.1117/12.955570.

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Reports on the topic "Astrometric"

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Kaplan, G. H. A Comparison of Radio and Optical Astrometric Reduction Algorithms. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada423227.

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Perlmutter, S. An astrometric search for a stellar companion to the sun. Office of Scientific and Technical Information (OSTI), November 1986. http://dx.doi.org/10.2172/6484337.

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Taff, Laurence G. The Analysis of Near-Earth Satellite Astrometric Data at the ETS. Fort Belvoir, VA: Defense Technical Information Center, December 1985. http://dx.doi.org/10.21236/ada163902.

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Tucker, Douglas. The Photometric and Astrometric Properties of DECam as Enablers of Precision Science. Office of Scientific and Technical Information (OSTI), January 2018. http://dx.doi.org/10.2172/1460564.

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Johnston, K. J. Astrometry and Reference Frames. Fort Belvoir, VA: Defense Technical Information Center, August 1999. http://dx.doi.org/10.21236/ada389881.

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Johnston, Kenneth J. The Future of Space Astrometry. Fort Belvoir, VA: Defense Technical Information Center, March 2000. http://dx.doi.org/10.21236/ada435796.

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Henry, Todd J., David G. Monet, Paul D. Shankland, Mark J. Reid, William van Altena, and Norbert Zacharias. Ground-Based Astrometry 2010-2020. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada524845.

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Johnston, Kenneth J. Advances in Astrometry and Geophysics Made Possible by Radio Interferometry. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada400378.

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Winter, L. SIM Grid Star Observations: Astrometry With a New High Dynamic Range Imaging Device. Fort Belvoir, VA: Defense Technical Information Center, March 2000. http://dx.doi.org/10.21236/ada435793.

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