Computer Science – Performance
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999evga.conf...80k&link_type=abstract
13th Working Meeting on European VLBI for Geodesy and Astrometry, p. 80 - 88
Computer Science
Performance
Scientific paper
Communications Research Laboratory (CRL) has led the development of VLBI technique in Japan and is keeping high activities in both observations and technical developments. CRL has promoted Key Stone Project (KSP) dedicated to monitoring the crustal deformation around the Tokyo metropolitan area using the space geodetic technique such as VLBI and SLR. In the KSP, real-time VLBI technique was developed and it has been applied to form a large big radio telescope connected by a high speed communications link. As for the next generation VLBI terminal, the Giga-bit VLBI system consisting of a high speed sampler (1Gsps/4ch/2bit) and a high speed digital data recorder (1024 Mbps) has also been developed. The first fringes using this system were successfully observed. Besides these developments, optical-linked RF interferometer has been investigated to measure phase delay precisely. The performance of GPS frequency reference receiver was tested to evaluate the possibility of its adoption as a frequency standard in VLBI observations in order to deploy VLBI-like techniques widely.
Amagai Jun
Furuya Masako
Ichikawa Ryu-ichi
Kaneko Hiroyuki
Kawai Eiji
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