Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pabei..25...74y&link_type=abstract
Progress in Astronomy (ISSN 1000-8349), Vol. 25, No. 1, p. 74 - 83 (2007)
Astronomy and Astrophysics
Astronomy
Astronomical Facilities And Technique, Very Long Baseline Interferometry(Vlbi), Data Record/Playback System, Vlbi Standard Interface, Vsi-H, Vsi-S, Vsi-E, Astronomical Facilities And Technique, Review, Vlbi, Data Record/Playback System
Scientific paper
Since the beginning of VLBI in the late 1960's, a large segment of VLBI instrumentation development has been directed towards the development of specialized data systems to cater to the extreme demands of both bandwidth and total data quantity. Several generations of specialized data systems have been developed by the user community itself. However, most of them are incompatible with each other, which has long been recognized as posing a serious obstacle to the realization of the full potential of VLBI observations. VLBI standard interface is a new concept in the recent year's development of VLBI technology, aiming to solve the incompatibility of various VLBI data systems. It is a common interface standard which would allow observations recorded on different VLBI data systems to be processed at a common correlator. The paper reviews the evolution of VLBI data system, including both the traditional record/playback system and the newly coming up e-VLBI. The necessity of VLBI standard interface and how it is developed is showed in detail. Three aspects of VLBI standard interface specification are introduced: 1) a hardware definition, VSI-H; 2) a software definition, VSI-S; 3) a definition which should help transferring VLBI via networks, VSI-E.
Yin Ni
Zhang Xiu-Zhong
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