Sience Field
Governmental Institutions => Geographical Survey Institute(GSI)
Project => Governmental Institutions
IPY => Governmental Institutions
| Overview | |
|---|---|
| Title | Absolute gravity measurement |
| Sub-Title | Absolute gravity measurement |
| Data Summary | The IAGBN aims to distribute gravity points worldwide and construct a network on which gravity observation is based . There are two kinds of points: A is a point set up in regions with stable crustal structure, and B is a point set up in regions where crustal activity is expected. Syowa Station in Antarctica was among the 36 A points. McMurdo Station of the U.S. is the only point in Antarctica other than Syowa Station that is classified as A. Introduced GSI in 1980, the upcast-type absolute gravity meter (GA60) generally called the Sakuma type, was used in this survey. The 36th JARE (1994) conducted observation using FG5 that the GSI introduced in 1992. Because FG5 measures gravity in a free-fall system, it is characterized by the ability to conduct automatic continuous measurement and allow for many measurements. |
| About Observation | |
| Spatial Coverage | |
| Data Location | IAGBN(A) |
| Observaion Period / Temporal Coverage |
1992 - present |
| Data Period | 1992.1,1995.1,2001.1,2004.1 - |
| Observation Photo |
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| Data Details | |
| Data Name | Absolute gravity measurement |
| Data Format | digital records |
| Data Recording / Acquisition Sampling |
About one month |
| Observation Instruments | GA60（1992.1）FG5（1995.1,2001.1,2004.1） |
| Sample Data |
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| Publication | |
| Publication method | Report Metadata/AMD: Absolute gravity measurement |
| Data Policy | |
| Data Center (Contact Person) |
Deputy Director of Physical Geodesy Div., Geodetic Dept., Geospatial Information Authority of Japan |
| gsi-antarctic-seika (at) ml.mlit.go.jp | |
| Related Organization | National Institute Polar Research Kyoto University |
| Scientific Results / Publication |
The decreasing tendency of the gravity value in Showa station is confirmed from the observation result of FG5. 
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| Digital Object Identifier(DOI) | |
| Creator | |
| Publisher | National Institute of Polar Research |