The International VLBI Service for Geodesy and Astrometry (IVS): current capabilities and future prospects |
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Authors: | Wolfgang Schlüter Dirk Behrend |
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Institution: | 1. Bundesamt für Kartographie und Geod?sie, Fundamentalstation Wettzell, Sackenrieder Str. 25, 93444, K?tzting, Germany 2. NVI Inc./Goddard Space Flight Center, Code 698, Greenbelt, MD, 20771, USA
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Abstract: | Very Long Baseline Interferometry (VLBI) plays a unique and fundamental role in the maintenance of the global (terrestrial
and celestial) reference frames, which are required for precise positioning in many research areas such as the understanding
and monitoring of global changes, and for space missions. The International VLBI Service for Geodesy and Astrometry (IVS)
coordinates the global VLBI components and resources on an international basis. The service is tasked by the International
Association of Geodesy (IAG) and International Astronomical Union (IAU) to provide products for the realization of the Celestial
Reference Frame (CRF) through the positions of quasars, to deliver products for the maintenance of the terrestrial reference
frame (TRF), such as station positions and their changes with time, and to generate products describing the rotation and orientation
of the Earth. In particular, VLBI uniquely provides direct observations of nutation parameters and of the time difference
UT1-UTC. This paper summarizes the evolution and current status of the IVS. It points out the activities to improve further
on the product quality to meet future service requirements. |
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Keywords: | International VLBI Service for Geodesy and Astrometry (IVS) Very Long Baseline Interferometry (VLBI) Earth orientation parameters (EOP) Terrestrial reference frame (TRF) Celestial reference frame (CRF) |
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