Mathematic model of the FX correlator of the Chinese VLBI network and its application

Weimin Zheng; Xiuzhong Zhang; Fengchun Shu

doi:10.1117/12.440289

18 September 2001 Mathematic model of the FX correlator of the Chinese VLBI network and its application

Weimin Zheng, Xiuzhong Zhang, Fengchun Shu

Proceedings Volume 4556, Data Mining and Applications; (2001) https://doi.org/10.1117/12.440289
Event: Multispectral Image Processing and Pattern Recognition, 2001, Wuhan, China

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.

Citation Download Citation

Weimin Zheng, Xiuzhong Zhang, and Fengchun Shu "Mathematic model of the FX correlator of the Chinese VLBI network and its application", Proc. SPIE 4556, Data Mining and Applications, (18 September 2001); https://doi.org/10.1117/12.440289

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