Proc. IAU volume 13, issue S336, P305-306 2017 DOI: 10.1017/s1743921317010936 View full text
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Kazuhiro Takefuji, Koichiro Sugiyama, Yoshinori Yonekura, Tagiru Saito, Kenta Fujisawa, Tetsuro Kondo

Abstract: AbstractFor the high-sensitivity 6.7 GHz methanol maser observations, we developed a new technology for coherently combining the two signals from the Hitachi 32 m radio telescope and the Takahagi 32 m radio telescope of the Japanese VLBI Network. Furthermore, we compared the SNRs of the 6.7 GHz maser spectra for two methods. One is a VLBI method and the other is the newly developed digital position switching, which is a similar technology to that used in noise-cancelling headphones. We report the phase-up tech…

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