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[B-10.2.1 Development of a Highly Transportable VLBI Station]

[Contact Person]

Yukio Takahashi
Radio Astronomy Applications Section
Kashima Space Research Center,
Communications Research Laboratory
893-1 Hirai, Kashima, Ibaraki, 314 Japan
Tel +81-299-84-4124, Fax +81-299-84-4128
E-mail ytakahas@crl.go.jp

[Total Budget for FY1990-1992]

46,339,000 Yen

[Abstract]

　CRL and GSI had developed the VLBI station with a 2.4m antenna to monitor the sea level. It is the smallest VLBI station in the world. In the first VLBI experiment between this station and Kashima 26m antenna on 15 October 1992, its position was determined with the precision of 1cm for the horizontal components and of 3cm for the vertical component. This error is better than the theoretical estimate and suggests that 2.4m antenna station has a good performance. This error level means that the vertical movements of tide gauge stations can be measured with an accuracy to 2mm/year after the experiments over ten years. Then we can estimate the sea level change with similar uncertainties. A new stable phase calibrator was developed by CRL and is adopted to this mobile station.

[Key Words]

VLBI, GPS, Tide Gauge, Sea Level