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An accurate measurements of lunar gravity fields by the differential VLBI technique

Research Project

Project/Area Number 11440135
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体地球物理学
Research InstitutionNational Astronomical Observatory

Principal Investigator

KAWANO Nobuyuki  Nat, Astron. Obs, Earth Rotation Division Professor, 地球回転研究系, 教授 (10186116)

Co-Investigator(Kenkyū-buntansha) NAMIKI Noriyuki  Kyusyu University, Assistant, 理学部, 助手 (50274428)
KATOU Takaji  National Space Development Agency of Japan, Associated Prof., 宇宙科学研究所, 助教授 (10249930)
HANADA Hideo  Nat. Astron. Obs., Earth Rotation Division, Associated Prof., 地球回転研究系, 助教授 (60132677)
KOYAMA Yasuhiro  Communications Research Laboratory, Senior Researcher, 鹿児宇宙通信センター, 助教授 (30359054)
YASUDA Shigeru  Kagoshima University, Assistant, 工学部, 助手 (30253909)
林 理三雄  鹿児島大学, 工学部, 教授 (70244259)
Project Period (FY) 1999 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
KeywordsMoon / Lunar gravity field / SELENE / 4-way Doppler / Orbit Determination / VLBI
Research Abstract

A new approach to investigation of lunar interior was conducted by this project, and the results will be applied to the mission of Japanese lunar exploration project SELENE. The main results are,
1) The new VLBI technique by receiving several frequency signals with narrow bands was developed in stead of conventional wide band VLBI technique. It will provide us the accurate lunar gravity field at the edge of the Moon and the structure of lunar crust in SELENE project.
2) A 4-way Doppler frequency method by relaying a stable signal between lunar orbiter through the relay satellite was investigated to obtain the first gravity field map in the lunar far side. This method is applied to one of the SELENE missions.
3) It was found that the Doppler caused by satellite spin is one of the serious error sources in Doppler measurements.
4) The new orbit determination software by using both Doppler and VLBI data was developed under the cooperation with NASA/GSFC.
5) Lunar free-air gravity anomaly and the distribution of Moho around craters were derived by inversion of Doppler. These new observation and analysis methods contribute lunar and planetary explorations in the near future.

Report

(5 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report

Research Products

(68 results)

All Other

All Publications

  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      2002 Final Research Report Summary
  • [Publications]

    • Related Report
      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2002 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2001 Annual Research Report
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      2000 Annual Research Report
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      2000 Annual Research Report
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      2000 Annual Research Report
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      2000 Annual Research Report
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      2000 Annual Research Report
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      2000 Annual Research Report
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      1999 Annual Research Report
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      1999 Annual Research Report
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      1999 Annual Research Report
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    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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