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Astrometry encompasses all that is necessary to provide the positions and motions of celestial bodies. This includes observational techniques, instrumentation, processing and analysis of observational data, reference systems and frames, and the resulting astronomical phenomena. Astrometry is fundamental to all other fields of astronomy, from the pointing of telescopes, to navigation and guidance systems, to distance and motion determinations for astrophysics. In the last few decades, new observational techniques have enabled improvements in accuracy by orders of magnitude. Starting from basic principles, this 2004 book provides the fundamentals for this new astrometry at milli- and micro-arcsecond accuracies. Topics include: basics of general relativity; co-ordinate systems; vectors, tensors, quaternions, and observational uncertainties; determination and use of the celestial and terrestrial reference systems and frames; applications of new observational techniques; present and future star catalogues and double star astrometry. This comprehensive reference will be invaluable for graduate students and research astronomers.

Astrometry. --- Astrométrie. --- Positional astronomy --- Spherical astronomy --- Astrometry --- Astrométrie

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The field of astrometry, the precise measurement of the positions, distances and motions of astronomical objects, has been revolutionized in recent years. As we enter the high-precision era, it will play an increasingly important role in all areas of astronomy, astrophysics and cosmology. This edited text starts by looking at the opportunities and challenges facing astrometry in the twenty-first century, from space and ground. The new formalisms of relativity required to take advantage of micro-arcsecond astrometry are then discussed, before the reader is guided through the basic methods required to transform our observations from detected photons to the celestial sphere. The final section of the text shows how a variety of astronomical problems can be solved using astrometric methods. Bringing together work from a broad range of experts in the field, this is the most complete textbook on observational astrometry and is ideal for graduate students and researchers alike.

Astrometry --- Astrométrie --- Astrometry. --- SCIENCE / Astrophysics & Space Science. --- Astrométrie --- Positional astronomy --- Spherical astronomy

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This book is the definitive guide to the techniques and applications of position location, covering both terrestrial and satellite systems. It gives all the techniques, theoretical models, and algorithms that engineers need to improve their current location schemes and to develop future location algorithms and systems. Comprehensive coverage is given to system design trade-offs, complexity issues, and the design of efficient positioning algorithms to enable the creation of high-performance location positioning systems. Traditional methods are also reexamined in the context of the cha

Geographical positions. --- Astrometry. --- Mathematical geography. --- Artificial satellites --- Tracking.

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Completely updated, this second edition gives a broad review of astronomical photometry to provide an understanding of astrophysics from a data-based perspective. It explains the underlying principles of the instruments used, and the applications and inferences derived from measurements. Each chapter has been fully revised to account for the latest developments, including the use of CCDs. Highly illustrated, this book provides an overview and historical background of the subject before reviewing the main themes within astronomical photometry. The central chapters focus on the practical design of the instruments and methodology used. The book concludes by discussing specialised topics in stellar astronomy, concentrating on the information derived from the analysis of the light curves of variable stars and close binary systems. It includes numerous bibliographic notes and a glossary of terms. It is ideal for graduate students, academic researchers and advanced amateurs interested in practical and observational astronomy.

Astronomical photometry. --- Astrometry. --- Positional astronomy --- Spherical astronomy --- Brightness (Astronomy) --- Photometry, Astronomical --- Photometry

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The new reduction of the Hipparcos data presents a very significant improvement in the overall reliability of the astrometric catalogue derived from this mission. Improvements by up to a factor 4 in the accuracies for in particular brighter stars have been obtained. This has been achieved mainly through careful study of the satellite dynamics, and incorporating results from these studies in the attitude modelling. Data correlations, caused by attitude-modelling errors in the original catalogue, have all but disappeared. This book provides overviews of the new reduction as well as on the use of the Hipparcos data in a variety of astrophysical implementations. A range of new results, like cluster distances and luminosity calibrations, is presented. The Hipparcos data provide a unique opportunity for the study of satellite dynamics. The orbit covered a wide range of altitudes, showing in detail the different torques acting on the satellite. One part of the book details these studies and their impact on the new reduction. It furthermore presents an extensive summary on a wide range of spacecraft and payload calibrations, which provide a detailed record of the conditions under which these unique Hipparcos data have been obtained.

Astrometry --- Data reduction --- Astrométrie --- Réduction des données (Statistique) --- Hipparcos (Artificial satellite) --- Astrometry. --- Data reduction. --- Hipparcos (Artificial satellite). --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Astronomy - General --- Astrophysics --- Astrométrie --- Réduction des données (Statistique) --- EPUB-LIV-FT LIVPHYSI SPRINGER-B --- Reduction of data --- Positional astronomy --- High Precision Parallax Collecting Satellite --- Astrophysics. --- Mechanics. --- Astronomy, Observations and Techniques. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Classical Mechanics. --- Spherical astronomy --- Automatic data collection systems --- Statistics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Astronomical physics --- Astronomy --- Cosmic physics --- Observations, Astronomical. --- Astronomy—Observations. --- Space sciences. --- Science and space --- Space research --- Cosmology --- Science --- Astronomical observations --- Observations, Astronomical