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Proceedings Paper

Mathematic model of the FX correlator of the Chinese VLBI network and its application
Author(s): Weimin Zheng; Xiuzhong Zhang; Fengchun Shu
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Paper Abstract

The Very Long Baseline Interferometry (VLBI) technique uses small radio telescopes to construct a huge synthetic telescope through earth rotation, resolving details as fine as 0.1 milliarcsecond. This paper introduces the principle of the VLBI synthesis and presents the mathematic model of the powerful high-speed FX type Chinese VLBI Network correlator. The principle of the delay and phase compensation, the signal transformation in the correlator, and the final complex visibility function are also presented, as well as the correlator's block diagram. The model is great helpful in designing and adjusting the FX VLBI correlator. Examples demonstrate how to use the model to judge the output visibility function and analyze the observing station performance and the astronomical line spectrum.

Paper Details

Date Published: 18 September 2001
PDF: 6 pages
Proc. SPIE 4556, Data Mining and Applications, (18 September 2001); doi: 10.1117/12.440289
Show Author Affiliations
Weimin Zheng, Shanghai Astronomical Observatory and National Astronomy Observataories (China)
Xiuzhong Zhang, Shanghai Astronomical Observatory and National Astronomy Observataories (China)
Fengchun Shu, Shanghai Astronomical Observatory and National Astronomy Observataories (China)

Published in SPIE Proceedings Vol. 4556:
Data Mining and Applications
Deren Li; Jie Yang; Jufu Feng; Shen Wei, Editor(s)

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