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52 <063> --- Astronomie. Astrofysica. Ruimteonderzoek. Geodesie--Congressen --- Celestial reference systems --- Congresses. --- Celestial coordinate systems --- Celestial frames of reference --- Celestial reference frames --- Coordinate systems, Celestial --- Frames of reference, Celestial --- Reference frames, Celestial --- Reference systems, Celestial --- Coordinates --- Geodetic astronomy --- Congresses

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This book series is composed of peer-reviewed proceedings of selected symposia organized by the International Association of Geodesy. It deals primarily with topics related to Geodesy as applied to the Earth Sciences : terrestrial reference frame, Earth gravity field, Geodynamics and Earth rotation, Positioning and engineering applications.

Geodesy --- Celestial reference systems --- Earth sciences --- Celestial coordinate systems --- Celestial frames of reference --- Celestial reference frames --- Coordinate systems, Celestial --- Frames of reference, Celestial --- Reference frames, Celestial --- Reference systems, Celestial --- Earth sciences. --- Geophysics. --- Earth Sciences. --- Geophysics/Geodesy. --- Geological physics --- Terrestrial physics --- Physics --- Geosciences --- Environmental sciences --- Physical sciences --- Coordinates --- Geodetic astronomy --- Physical geography. --- Geography

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52 <063> --- Celestial reference systems --- -Geodesy --- -Geodynamics --- -Dynamic geology --- Tectonophysics --- Geophysics --- Degrees of latitude and longitude --- Geodetics --- Geomatics --- Mathematical geography --- Surveying --- Celestial coordinate systems --- Celestial frames of reference --- Celestial reference frames --- Coordinate systems, Celestial --- Frames of reference, Celestial --- Reference frames, Celestial --- Reference systems, Celestial --- Coordinates --- Geodetic astronomy --- Astronomie. Astrofysica. Ruimteonderzoek. Geodesie--Congressen --- Congresses --- Earth --- -Earth --- Rotation --- -Congresses --- -Astronomie. Astrofysica. Ruimteonderzoek. Geodesie--Congressen --- -Rotation --- Geodesy --- Geodynamics --- Earth (Planet) --- CELESTIAL REFERENCE SYSTEMS --- EARTH --- GEODESY --- GEODYNAMICS --- ROTATION

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The high accuracy of modern astronomical spatial-temporal reference systems has made them considerably complex. This book offers a comprehensive overview of such systems. It begins with a discussion of ‘The Problem of Time’, including recent developments in the art of clock making (e.g., optical clocks) and various time scales. The authors address  the definitions and realization of spatial coordinates by reference to remote celestial objects such as quasars. After an extensive treatment of classical equinox-based coordinates, new paradigms for setting up a celestial reference system are introduced that no longer refer to the translational and rotational motion of the Earth. The role of relativity in the definition and realization of such systems is clarified. The topics presented in this book are complemented by exercises (with solutions). The authors offer a series of files, written in Maple, a standard computer algebra system, to help readers get a feel for the various models and orders of magnitude. Beyond astrometry, the main fields of application of high-precision astronomical spatial-temporal reference systems and frames are navigation (GPS, interplanetary spacecraft navigation) and global geodynamics, which provide a high-precision Celestial Reference System and its link to any terrestrial spatial-temporal reference system. Mankind’s urgent environmental questions can only be answered in the context of appropriate reference systems in which both aspects, space and time, are realized with a sufficiently high level of accuracy. This book addresses all those interested in high-precision reference systems and the various techniques (GPS, Very Long Baseline Interferometry, Satellite Laser Ranging, Lunar Laser Ranging) necessary for their realization, including the production and dissemination of time signals.  .

Astronautics in geodesy. --- Geodesy -- Remote sensing. --- Geographic information systems. --- Geodetic astronomy --- Space and time --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Practical & Spherical Astronomy --- Astronomy - General --- Celestial reference systems. --- Time --- Systems and standards. --- Standard time --- Time zones --- Celestial coordinate systems --- Celestial frames of reference --- Celestial reference frames --- Coordinate systems, Celestial --- Frames of reference, Celestial --- Reference frames, Celestial --- Reference systems, Celestial --- Standards --- Physics. --- Geophysics. --- Gravitation. --- Observations, Astronomical. --- Astronomy --- Space sciences. --- Physical measurements. --- Measurement. --- Aerospace engineering. --- Astronautics. --- Astronomy, Observations and Techniques. --- Geophysics/Geodesy. --- Aerospace Technology and Astronautics. --- Extraterrestrial Physics, Space Sciences. --- Measurement Science and Instrumentation. --- Classical and Quantum Gravitation, Relativity Theory. --- Observations. --- Units of measurement --- Frequency standards --- Coordinates --- Physical geography. --- Astrophysics. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Astronomical physics --- Cosmic physics --- Physics --- Space sciences --- Aeronautics --- Astrodynamics --- Space flight --- Space vehicles --- Geography --- Astronomy—Observations. --- Measurement   . --- Field theory (Physics) --- Matter --- Antigravity --- Centrifugal force --- Relativity (Physics) --- Measuring --- Mensuration --- Mathematics --- Technology --- Metrology --- Physical measurements --- Measurements, Physical --- Mathematical physics --- Measurement --- Science and space --- Space research --- Cosmology --- Science --- Aeronautical engineering --- Astronautics --- Engineering --- Geological physics --- Terrestrial physics --- Earth sciences --- Astronomical observations --- Observations, Astronomical --- Properties