Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008fstj...44..419a&link_type=abstract
Fujitsu Scientific and Technical Journal, volume 44, number 4, p. 419-425
Astronomy and Astrophysics
Astronomy
Scientific paper
The National Astronomical Observatory of Japan is constructing a large interferometer called the Atacama Large Millimeter/submillimeter Array (ALMA) ona plateau near the Atacama Desert in Chile at an elevation of about 5000 m, in cooperation with the National Radio Astronomy Observatory of the USA and the European Southern Observatory. In cooperation with FFC Limited, Fujitsu is taking charge of development of the Atacama Compact Array (ACA) correlator used in correlation processing of data collected with the interferometer. Fujitsu is also charged with developing the monitor and control system based on Fujitsu's Linux PRIMERGY servers. The PRIMERGY RX300 S3 used for this system must operate stably in a severe environment at an elevation of about 5000 m and under atmosperic pressure of about 0.5 atm. We employed a diskless system for stable operation, thus making the system reliable even at low atmospheric pressure. We also conducted long-time running tests in an environment similar to the Atacama high-altitude environment, and adopted a remote maintenance system in order to make error handling and recovery much easier. This paper briefly introduces the ALMA project, and then describes the means of stable monitor and control system operation.
Abe Katsumi
Kawase Sachiko
Moriya Mitsuhiro
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