NTT's ultrahigh-speed networking experiment: a real-time VLBI project

Hisao Uose; Kazunari Irie; Sotetsu Iwamura

doi:10.1117/12.461139

27 November 2002 NTT's ultra-high-speed networking experiment: a real-time VLBI project

Hisao Uose, Kazunari Irie, Sotetsu Iwamura

Proceedings Volume 4845, Advanced Global Communications Technologies for Astronomy II; (2002) https://doi.org/10.1117/12.461139
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Since 1995 Nippon Telegraph and Telephone Corporation (NTT) has been conducting experiments on real-time VLBI (very long baseline interferometry) using a large scale network testbed having the maximum speed of 2.4Gb/s. With the real-time data transmission using high-speed communications network, the bottleneck resulted from the limited data rates with the conventional magnetic tape based VLBI system can be removed. Two applications of VLBI, geodesy and radio astronomy, are being pursued with our trial and extensive research items regarding the real-time VLBI technology are being conducted. So far, through the experiments using the developed real-time VLBI system, great improvement in observation performance has been achieved. Now we are concentrated in developing an economical VLBI data transfer system using advanced IP (Internet Protocol) technologies to achieve greater connectivity to other research organizations.

Citation Download Citation

Hisao Uose, Kazunari Irie, and Sotetsu Iwamura "NTT's ultra-high-speed networking experiment: a real-time VLBI project", Proc. SPIE 4845, Advanced Global Communications Technologies for Astronomy II, (27 November 2002); https://doi.org/10.1117/12.461139

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