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IEICE TRANSACTIONS on Communications

Realtime VLBI System Using Public ATM Network

Shin'ichi HAMA, Hitoshi KIUCHI, Michito IMAE, Yukio TAKAHASHI, Hisao UOSE, Akihiro KANEKO, Kazuhiko NATORI

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Summary :

VLBI is an important application of ATM technology because it can transmit huge amounts of data. A single VLBI experiment typically generates data (which must be recorded and transported until they are cross-correlated) of tera-bit order at each separated observing site. Conventional VLBI not only requires manpower but also limits the maximum observation data rate. Therefore, a realtime VLBI using a private ATM network was developed recently, but it could not be utilized for regular VLBI experiment. Since utilization of public ATM is most realistic solution for realtime VLBI between ordinary observing sites, we have developed an interface equipment that connects VLBI observation and processing equipment to a public ATM network and demonstrated a successful experiment. This equipment supports VLBI's standard bit rates as 128 Mbps and 256 Mbps, though data rate for user's payload in 155.52 Mbps (STM-1/OC-3) ATM network is actually only 119.5 Mbps. It can easily step to higher networks as 622 Mbps.

Publication
IEICE TRANSACTIONS on Communications Vol.E83-B No.2 pp.246-252
Publication Date
2000/02/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (IEICE/IEEE Joint Special Issue on Recent Progress in ATM Technologies)
Category
ATM Switch and System Development

Authors

Keyword

VLBI,  ATM,  CBR,  satellite link