Precise Observation of the Secular-Gravity Changes by means of the combination of Absolute and Superconducting Gravimeters.

结合绝对重力仪和超导重力仪精确观测长期重力变化。

基本信息

  • 批准号:
    11440132
  • 负责人:
  • 金额:
    $ 4.86万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    1999
  • 资助国家:
    日本
  • 起止时间:
    1999 至 2001
  • 项目状态:
    已结题

项目摘要

To obtain so accurate data sets of gravity variations as to be used for the comparison with the satellite gravity data such as GRACE, we studied practical methods to combine superconducting and absolute gravity measurements as well as to improve the accuracies of the individual measurements.For this purpose, we have continued superconducting gravity observations at the observation stations of Kyoto, Esashi, Matsushiro in Japan and Bandung in Indonesia. We also started groundwater measurements to reveal their gravity effects at Kyoto and Bandung stations: The results show a clear correlation between the groundwater variations and the gravity observations, especially at the Bandung station. We confirmed that the accuracy of the gravity measurements are improved by removing the groundwater effects.We carried out several absolute gravity measurements in parallel with the superconducting observations at the Esashi and Matsusiro stations in 2000 and 2001 as well as the Kyoto stations where absolute measurements are periodically conducted. The total observation, time in both stations exceeded more than one month which is long enough for purpose of comparison. Moreover, we developed a new method for the data processing, we finally obtained very precise calibration factors for the superconducting gravimeters. We also determined reference gravity values for future studies of secular gravity changes at the stations.To maintain the accurate absolute gravity measurements, adjustments and validations are very important. We carried out the comparison between the absolute gravity meters in collaboration with Geographical Survey Institute. The comparison also contributed to accumulate the know how of the absolute gravity measurements.In addition to the actual measurements, we also conducted several simulation studies of satellite gravity mission data and ground base measurements, and we established the basic techniques of future utilization of those data sets.
为了获得准确的重力变化数据集,以便与GRACE等卫星重力数据进行比较,我们研究了超导和绝对重力测量相结合的实用方法,并提高了单独测量的精度。为此,我们在日本京都、Esashi、Matsushiro和印度尼西亚万隆的观测站继续进行了超导重力观测。我们还开始在京都站和万隆站进行地下水测量,以揭示它们的重力效应:结果表明,地下水变化与重力观测之间存在明显的相关性,特别是在万隆站。我们确认,通过消除地下水的影响,重力测量的精度得到了提高。我们在2000年和2001年在Esashi和Matsusiro站以及定期进行绝对测量的京都站进行了几次绝对重力测量,同时进行了超导观测。两个台站的总观测时间都超过了一个月,这足以进行比较。此外,我们还开发了一种新的数据处理方法,最终得到了非常精确的超导重力仪定标因子。为进一步研究台站重力长期变化,我们还确定了参考重力值。为了保持准确的绝对重力测量,平差和验证是非常重要的。我们与地理勘测院合作进行了绝对重力仪的比对。除了实际测量外,我们还对卫星重力任务数据和地面测量数据进行了多次仿真研究,建立了这些数据集未来利用的基本技术。

项目成果

期刊论文数量(30)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
福田洋一: "衛星アルティメトリィと衛星重力ミッション"測地学会誌. 46. 53-67 (2000)
Yoichi Fukuda:“卫星测高和卫星重力任务”大地测量学会杂志 46. 53-67 (2000)。
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    0
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  • 通讯作者:
Imanishi,Y.: "Present Status of SG T011 at Matsushiro, Japan"Chaiers du Centre Europeen Geodynamique et de Seismologie. 17. 97-102 (2000)
Imanishi,Y.:“日本松代 SG T011 的现状”欧洲地球动力学和地震学中心主席。
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    0
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  • 通讯作者:
Ogasawara, S., Higashi, T., 他: "Calibration of a Superconducting Gravimeter with an Absolute Gravimeter FG-5 in Kyoto"J. Geod. Soc. Japan. 47. 404-409 (2001)
Ogasawara, S., Higashi, T. 等人:“京都的绝对重力计 FG-5 的校准”J. Soc. 47. 404-409 (2001)。
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    0
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  • 通讯作者:
Foldvary L.and Y.Fukuda: "IB and NIB Hypotheses and Their Possible Discrimination by GRACE"Geophys.Res.Lett.. 28. 663-666 (2001)
Foldvary L. 和 Y.Fukuda:“IB 和 NIB 假设及其可能的 GRACE 歧视”Geophys.Res.Lett.. 28. 663-666 (2001)
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Fukuda Y.: "Satellite Altimetry and Satellite Gravity Missions"J. Geod. Soc. Japan. 46. 53-67 (2000)
Fukuda Y.:“卫星测高和卫星重力任务”J.
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FUKUDA Yoichi其他文献

FUKUDA Yoichi的其他文献

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{{ truncateString('FUKUDA Yoichi', 18)}}的其他基金

Determination of the precise gravity fields around the Japanese Antarctic station, Syowa, using GOCE satellite gravity data
使用 GOCE 卫星重力数据确定日本南极站昭和周围的精确重力场
  • 批准号:
    23540494
  • 财政年份:
    2011
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Comparison Study on Land Subsidence at 3 Megacities in Indonesia by Means of Recent Integrated Geodetic Observation Methods
近期综合大地观测方法对印度尼西亚3大城市地面沉降的比较研究
  • 批准号:
    20403007
  • 财政年份:
    2008
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Probing the Earth from the equatorial regions Superconducting gravimeter observations
从赤道地区探测地球 超导重力仪观测
  • 批准号:
    19340128
  • 财政年份:
    2007
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Studies on global gravity changes by means of absolute gravity measurements at the GGP-JAPAN superconducting gravity stations.
通过GGP-JAPAN超导重力站的绝对重力测量研究全球重力变化。
  • 批准号:
    14340132
  • 财政年份:
    2002
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
basic research on Buddhist terminology in Sanskrit, Tibetan, Mongolian and Chinese based on Mahavyutpatti
基于《大观》的梵、藏、蒙、汉佛教术语基础研究
  • 批准号:
    12610026
  • 财政年份:
    2000
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Philosophical Investigation of Sunyata in the Madhyamika Philosophy
中观哲学中空性的哲学考察
  • 批准号:
    06610028
  • 财政年份:
    1994
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A General Study of the Basic Materials on the History, Religion, Language and Folkways of Tibet.
西藏历史、宗教、语言、民俗基础资料综合研究。
  • 批准号:
    63410007
  • 财政年份:
    1988
  • 资助金额:
    $ 4.86万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (A)
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