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Interferometry Techniques with Heterogeneous VLBI Data

Abstract— Very-long-baseline interferometry (VLBI) is a powerful technique in radio astronomical observations. However, data recorded by different digital back ends in different observatories could be heterogeneous and are not able to be processed directly. This paper discusses a VLBI data transformer for heterogeneous data processing in the general situation. Furthermore, a direct-FX correlator architecture is proposed to perform correlation between heterogeneous data directly. Both method has been verified by computer simulations and quasar observations.

Index Terms— VLBI, data transformer, correlator.

Tianyi Zhang, Qiao Meng, Wei Liu, Quantao Yu
Southeast University, CHINA
Weimin Zheng, Li Tong
Shanghai Astronomical Observatory, Chinese Academy of Sciences, CHINA

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Cite: Tianyi Zhang, Qiao Meng, Weimin Zheng, Wei Liu, Li Tong, Quantao Yu, "Interferometry Techniques with Heterogeneous VLBI Data," Proceedings of 2016 6th International Workshop on Computer Science and Engineering, pp. 571-574, Tokyo, 17-19 June, 2016.