Distributed storage and control system of Subaru Telescope on the high-speed wide-area connection

Details Distributed storage and control system of Subaru Telescope on the high-speed wide-area connection Distributed storage and control system of Subaru Telescope on the high-speed wide-area connection

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4845....8o&link_type=abstract

Advanced Global Communications Technologies for Astronomy II. Edited by Kibrick, Robert I. Proceedings of the SPIE, Volume 4845

Astronomy and Astrophysics

Astronomy

1

Scientific paper

In order to achieve an effective operation and research based on data taken by the Subaru Telescope, we installed a satellite storage and analysis system at Mitaka headquarters of Naoj, on March 2002. Data taken by instruments by Subaru Telescope located at the summit of Mauna Kea is transferred to the STN-II system at Hilo base, and satellite system at Mitaka through the OC3 dedicated network link between Hilo and Mitaka. In Japan, an academic research backbone, SuperSINET spans among various universities and institutes with 10Gbps bandwidth at most, and it is easy for astronomers from Japan to access Subaru data through high speed backbone network in Japan. Database on each site, Hilo and Mitaka, are maintained independently, however, all records and history of updating are transferred each other frequently enough to make it possible for recovery in case of any discrepancy among database. Since the round trip time of the light signal between Hawaii and Japan could not be reduced 45msec, we need a special tuning not only for the data transfer between those two node, but also for the remote control sequence.

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