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Fundamental Research of Phase Correction Methods in Millimeter and Sub-mm wavelengths and high-resolution imaging

Research Project

Project/Area Number 06554002
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Astronomy
Research InstitutionNational Astronomical Observatory

Principal Investigator

ISHIGURO Masato  Radio Astronomy Division National Astronomical Observatory, professor, 電波天文学研究系, 教授 (40023684)

Co-Investigator(Kenkyū-buntansha) SASAO Tetuo  Earth Rotation Division National Astronomical Observatory professor, 地球回転研究系, 教授 (20000177)
CHIKADA Yoshihiro  Optical and Infrared Astronomy Division National Astronomical Observatory, profe, 光学赤外線天文学研究系, 教授 (30126122)
MORITA Koichiro  Radio Astronomy Division National Astronomical Observatory, assistant professor, 電波天文学研究系, 助教授 (20167688)
KAWAGUCHI Noriyuki  Radio Astronomy Division National Astronomical Observatory, assistant professor, 電波天文学研究系, 助教授 (90214618)
KAWABE Ryohei  Radio Astronomy Division National Astronomical Observatory, assistant professor, 電波天文学研究系, 助教授 (10195141)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥17,300,000 (Direct Cost: ¥17,300,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1994: ¥10,000,000 (Direct Cost: ¥10,000,000)
Keywordsmillimeter-and submillimeter-wave interferometer / phase correction method / high-resolution imaging / differencial radiometer / radio seeing monitor / paired antenna method / modeling of tropospheric radio transfer
Research Abstract

Several kinds of techniques were developed and actually tested for effective correction of a tropospheric phase fluctuation in millimeter-and submillimeter-wave radio interferometry, including very long baseline interferometry (VLBI) ; 1) radiometric phase correction method, 2)paired antenna method and 3)fast switching method. It was found from the experiments using the Nobeyama Millimeter Array (NMA) and a so-called radio seeing monitor that the paired antenna method and fast switching method were very effective for the phase correction at cm-wave observations. On the other hand, radiometric phase correction was found to be very usefull for the correction of the phase fluctuation in millimeter-and submillimeter-wave, by the experiments useing newly developed high-precision radiometers working at 220GHz, which are installed on the NMA.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Yoshiharu Asaki et al.: "Phase Compensation Experiments with the Paired Antenna Method" Radio Science. 31,6. 1615-1625 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Seiji Katagiri et al.: "An Imaging Algorithm Using the Bispectrum in Radio Interferometry" Publications of the Astronomical Society of Japan. 49,1. 123-129 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kotaro Kohno et al.: "Preliminary Result of Site Testing in Northern Chile with a Portable 220GHz Radiometer" NRO Techinical Report. 42. (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.-A.Holdaway et al.: "Correlation between Opacity and Surface Water Vapor Pressure Measurements at Rio Frio" NRO Techinical Report. 52. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Asaki et al.: ""Phase Compensation Experiments with the Paired Antenna Method"" Radio Science. 31,6. 1615-1625 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Katagiri et al.: ""An Imaging Algorithm Using the Bispectrum in Radio Interferometry"" Publications of the Astronomical Society of Japan. 49,1. 123-129 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Kono et al.: ""Preliminary Result of Site Testing in Northern Chile with a Portable 220GHz Ra-diometer"" NRO Techinical Report. 42. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.-A.Holdaway et al.: ""Correlation between Opacity and Surface Water Vapor Pressure Measurement at Rio Frio"" NRO Techinical Report. 52. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yoshiharu Asaki: "Phase compensation experiments with the paired antennas method" Radio Science. 31・6. 1615-1625 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kotaro Kono: "Preliminary result of Site Testing in Northern Chile with a Portable 220 GHz Radiometer" NRO(Nobeyama Radio Observatory)Reports. No.42. 1-12 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Tetsuo Sasao: "Compensation of Atmospheric Phase Fluctuations with the Paired Antenna Methods" (in prparation).

    • Related Report
      1995 Annual Research Report
  • [Publications] Yoshiharu Asaki: "Experiments of the Paired Antenna Methods with Nobeyama Millimeter Array at 19 GHz" (in prparation).

    • Related Report
      1995 Annual Research Report
  • [Publications] Kotaro Kono: "Preliminary result of Site Testing in Northern Chile with a Portable 220 GHz Radiometer" NRO(Nobeyama Radio Observatory)Reports. No.42. 1-12 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tetsuo Sasao: "Compensation of Atmospheric Phase Fluctuations with the Paired Antenna Methods" in preparation.

    • Related Report
      1994 Annual Research Report
  • [Publications] Yoshiharu Asaki: "Experiments of the Paired Antenna Methods with Nobeyama Millimeter Array at 19 GHz" in preparation.

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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