GSI Activity
Takashi Saito
Geographical Survey Institute
Kitasato-1, Tsukuba, Ibaraki 305, Japan
VLBI
GSI participated in 11 international VLBI observations in FY1995.
Kashima 26m-antenna, that has been used for international VLBI
observation, had been fixed last year. GSI's transportable VLBI system
(3.8m antenna and transportable container for observation) has been
transported to Korea for Japan - Korea VLBI observation, under the
cooperation with NGI ( National Geography Institute, Korea ). We
conducted 24-hour observation 4 times, and got the baseline between
Kashima-26m and Suwon site in Korea. Domestic VLBI observations for
Kashima-Mizusawa and Kashima-Tsukuba baselines were conducted. New VLBI
observation sites, Chichijima and Aira, are under construction. They
will have a 10m-class telescope, S/X receiver and K-4 VLBI equipment.
Another VLBI site with a 25m-30m class antenna will be established
in GSI Headquarters' field at Tsukuba. These new facilities will be
available in 1997 - 1998, and operated by GSI for geodesy and Earth
sciences.
GPS
GPS permanent networks, that have two
hundred GPS permanent sites, have been operated by GSI for more than
one year. These network has detected
crustal deformation concerned with some big earthquakes such as
Hyogo-ken Nanbu EQ (Kobe EQ), Hokkaido Toho-oki EQ, Sanriku-Haruka-oki
EQ. The network are added more than 400 sites in
FY1995. Furthermore, two or three hundred sites are going to be
established in FY1996. The data from this observation network will be
available in the near future for researchers and surveyors who wish to
use them.
Organization
A new department Geodetic Observation Center is established in this year.
It operates the
continuous observation networks; GPS, tide gauges, tiltmeters and
extensometers.
Updated on June 25, 1996.
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