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2009 Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09)   unpublished
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