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Proceedings Paper

Very long baseline connected interferometry via the ATM network
Author(s): Hitoshi Kiuchi; Yukio Takahashi; Akihiro Kaneko; Jun Amagai; Taizoh Yoshino; Noriyuki Kawaguchi; Hideyuki Kobayashi; Kenta Fujisawa; Hisao Uose; Sotetsu Iwamura; Takashi Hoshino; Junichi Nakajima; Tetsuya Kondo
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Paper Abstract

The Communications Research Laboratory (CRL), the National Astronomical Observatory (NAO), the Institute of Space and Astronautical Science (ISAS), and the Telecommunication Network Laboratory Group of Nippon Telegraph and Telephone Corporation have developed a real-time VLBI array, maximum baseline-length was 208 km. The very long baseline interferometry (VLBI) observed data is transmitted through a high-speed asynchronous transfer mode (ATM) network (2,488- Gbps [STM-16/OC-48] ATM network) instead of being recorded onto magnetic tapes. The system was composed of two real-time VLSI networks: the Keystone Project network of CRL (which is used for measuring crustal deformation in the Tokyo metropolitan area), and the OLIVE (optically linked VLBI experiment) network of NAO and ISAS which is used for astronomy (space-VLBI). The acquired VLBI data were corrected via the ATM network and the cross-correlation processing were done simultaneously. A radio flares on the weak radio source (HR1099) and weak radio sources were detected.

Paper Details

Date Published: 2 June 2000
PDF: 6 pages
Proc. SPIE 4011, Advanced Global Communications Technologies for Astronomy, (2 June 2000); doi: 10.1117/12.387226
Show Author Affiliations
Hitoshi Kiuchi, Communications Research Lab. (Japan)
Yukio Takahashi, Communications Research Lab. (Japan)
Akihiro Kaneko, Communications Research Lab. (Japan)
Jun Amagai, Communications Research Lab. (Japan)
Taizoh Yoshino, Communications Research Lab. (Japan)
Noriyuki Kawaguchi, National Astronomical Observatory (Japan)
Hideyuki Kobayashi, National Astronomical Observatory (Japan)
Kenta Fujisawa, National Astronomical Observatory (Japan)
Hisao Uose, NTT Information Sharing Platform Labs. (Japan)
Sotetsu Iwamura, NTT Information Sharing Platform Labs. (Japan)
Takashi Hoshino, NTT Advanced Technology Corp. (Japan)
Junichi Nakajima, Kashima Space Research Ctr./Communications Research Lab. (Japan)
Tetsuya Kondo, Kashima Space Research Ctr./Communications Research Lab. (Japan)


Published in SPIE Proceedings Vol. 4011:
Advanced Global Communications Technologies for Astronomy
Robert I. Kibrick; Anders Wallander, Editor(s)

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