Geodetic VLBI experiments between southern-hemisphere network and Japanese islands
| Project/Area Number |
10640413
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
固体地球物理学
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| Research Institution | National Astronomical Observatory |
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Principal Investigator |
TAMURA Yoshiaki National Astronomical Observatory Division of Earth Rotation Research Fellow, 地球回転研究系, 助手 (90150002)
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| Co-Investigator(Kenkyū-buntansha) |
HEKI Kosuke National Astronomical Observatory Division of Earth Rotation Associ-Professor, 地球回転研究系, 助教授 (30280564)
MANABE Seiji National Astronomical Observatory Division of Earth Rotation Associ-Professor, 地球回転研究系, 助教授 (30000178)
YOKOYAMA Koichi National Astronomical Observatory Division of Earth Rotation Professor, 地球回転研究系, 教授 (10088784)
DOI Koichiro National Institute of Polar Research, Center for Antarctic Environmental Monitoring Research Fellow, 南極圏環境モニタリングセンター, 助手 (80290873)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | VLBI / Reference Frame / Antarctic Plate / Correlator / K4 System / S2 System |
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| Research Abstract |
This study is carried out for the purpose to measure the motion of the Antarctic plate, in which geodetic observation sites are rare, by performing the VLBI experiments between southern-hemisphere VLBI network including Syowa Station, Antarctica. Technical improvement are also studied. Sampling rate of 10m Antenna at the National Astronomical Observatory (NAO). Mizusawa, is improved. Now 128Mbit/s sampling is available in the geodetic experiments instead of 64Mbit/s sampling. A major technical development is to be establish the compatibility between deferent VLBI system, The domestic VLBI stations and Syowa Station adopt so called K4-TSS system, while S2 system is used in oversea stations.
The VLBI experiments were carried out among Syowa Station (11m antenna). Kashima (26m antenna), Hobart (Tasmania Univ, , Australia). Hartebeesthoek (South Africa) and Parkse (CSIRO, Australia) in 1998-1999. Those experiment were supported by many institutes and many people, especially by The National Institute of Polar Research, Japan Antarctic Research Expedition (JARE) 39, and Geographical Institute of Japan. The observation data of oversea stations are converted from S2 system to K4 system, and then correlation process is carried at the correlation center at NAO.Correlation process is slightly modified for geodetic purpose because the correlator is originally designed for astrophysical purposes. We finally constructed database for tow baseline analyses. We enhanced the importance of Syowa Station as a geodetic observation site by carrying out global VLBI experiments at Syowa Station.
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Report
(4 results)
Research Products
(15 results)
