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e-VLBI Activities in Japan

Mamoru Sekido, Noriyuki Kawaguchi, Yasuhiro Koyama, Moritaka Kimura, Tetsuro Kondo, Hiroshi Takiguchi, Thomas Hobiger, Kazuhiro Takefuji, T. Ikeda, Shinji Shimojo, Tomoaki OYAMA, Hiroaki Harai (+10 others)
2009 Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09)   unpublished

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Recent Japanese e-VLBI activities are reported in this paper. Offline data transfer though the network has been regularly performed for geodetic VLBI experiments. Besides these offline transfers, real-time eVLBI experiments for ultra-rapid UT1 measurements have been performed among Onsala, Metsähovi, Tsukuba, and Kashima stations in a pilot project. In the field of astronomy, a real-time e-VLBI demonstration session organized by the ATNF in 2008 was the first occasion for Kashima to transmit
more » ... I data obtained by the K5 system to a foreign correlator in real-time. The global e-VLBI observation session organized by JIVE for the opening event of International Year of Astronomy in January 2009 was the first participation for a Japanese station in a global real-time e-VLBI session. Overview of the K5 DAS systems (K5/VSSP, and K5/VSI) used for the e-VLBI is described. Optically linked e-VLBI observations with domestic VLBI stations have been conducted by the NAOJ. Also the NAOJ has developed a high speed VLBI data sender/reciver equipment named VOA-200 and a high speed hardware correlator (2Gbps × 6 baselines). A test observation of 8 Gbps real-time VLBI was successfully achieved by using the VOA-200 and the hardware correlator in 2008.
doi:10.22323/1.082.0024 fatcat:7y3yg53i7nac3m57exbcyedscm
Citation

Mamoru Sekido, Noriyuki Kawaguchi, Yasuhiro Koyama, Moritaka Kimura, Tetsuro Kondo, Hiroshi Takiguchi, Thomas Hobiger, Kazuhiro Takefuji, T. Ikeda, Shinji Shimojo, Tomoaki OYAMA, Hiroaki Harai, Tetsuya Hara, Yusuke Kono, Shinobu Kurihara, Kensuke Kokado, Daisuke Tanimoto, Kentarou Nozawa, Hiroshi Takeuchi, Hisao Uose, K. Fujisawa, Hiroshi Takaba. "e-VLBI Activities in Japan." Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09) (2009)