Astronomical VLBI: Comparison and Contrast with Geodetic/Astrometric VLBI

Details Astronomical VLBI: Comparison and Contrast with Geodetic/Astrometric VLBI Astronomical VLBI: Comparison and Contrast with Geodetic/Astrometric VLBI

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ivsg.conf...42w&link_type=abstract

International VLBI Service for Geodesy and Astrometry: 2000 General Meeting Proceedings, p. 42

Astronomy and Astrophysics

Astronomy

1

Very Long Base Interferometry, Astronomical Interferometry, Astrometry, Geodesy, Geodetic Surveys, Optical Equipment, Space Observations (From Earth), Radio Astronomy

Scientific paper

The VLBI technique can be used for both high precision geometric measurements in geodetic and astrometric observations, and to study astronomical sources with high resolution. The equipment required for both types of observations is essentially the same and many telescopes and correlators are used for both. This synergy gives both the geodesy and astronomy communities access to more resources than either could support alone. The IVS membership is familiar with geodetic/astrometric VLBI, but perhaps less so with astronomical VLBI. Therefore, this presentation will begin with an introduction to the existing astronomical VLBI instruments. That will be followed by a number of examples of astronomical VLBI results to give a flavor for the science. Then some direct comparisons between geodetic and astronomical VLBI will be made with emphasis on observing modes and on the importance of various aspects of the data. Finally, the interaction between the groups will be discussed, both in terms of how they are interdependent and how differences in style have created some complications.

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