The International VLBI Service for Geodesy and Astrometry (IVS): current capabilities and future prospects

Details The International VLBI Service for Geodesy and Astrometry (IVS): current capabilities and future prospects The International VLBI Service for Geodesy and Astrometry (IVS): current capabilities and future prospects

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgeod..81..379s&link_type=abstract

Journal of Geodesy, Volume 81, Issue 6-8, pp. 379-387

Astronomy and Astrophysics

Astronomy

50

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)

Scientific paper

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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