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

毫米及亚毫米波长相位校正方法及高分辨率成像基础研究

• 批准号: 06554002
• 负责人: ISHIGURO Masato
• 金额: $ 11.07万
• 依托单位: National Astronomical Observatory
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06554002/
• 关键词: millimeter-and submillimeter-wave interferometer; phase correction method; high-resolution imaging; differencial radiometer; radio seeing monitor; paired antenna method; modeling of tropospheric radio transfer

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.

在毫米和亚毫米波无线电干涉测量中，包括甚长基线干涉测量（VLBI），开发并实际测试了几种有效校正对流层相位波动的技术；1)辐射相位校正法，2)配对天线法，3)快速切换法。利用野山毫米波阵列（Nobeyama Millimeter Array， NMA）和所谓的无线电观测监测仪进行的实验发现，配对天线法和快速切换法对毫米波观测的相位校正非常有效。另一方面，利用安装在NMA上的新研制的220GHz高精度辐射计进行了实验，发现辐射相位校正对于毫米波和亚毫米波的相位波动校正非常有用。

项目成果

Yoshiharu Asaki: "Experiments of the Paired Antenna Methods with Nobeyama Millimeter Array at 19 GHz" in preparation.

Yoshiharu Asaki：“19 GHz 下野边山毫米阵列配对天线方法的实验”正在准备中。

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)

S.Katagiri 等人：“一种在射电干涉测量中使用双谱的成像算法”，日本天文学会出版物。

Yoshiharu Asaki: "Phase compensation experiments with the paired antennas method" Radio Science. 31・6. 1615-1625 (1996)

Yoshiharu Asaki：“配对天线法的相位补偿实验”无线电科学 31・6（1996）。

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)

Seiji Katagiri 等人：“一种在射电干涉测量中使用双谱的成像算法”，日本天文学会出版物。

M.-A.Holdaway et al.: "Correlation between Opacity and Surface Water Vapor Pressure Measurements at Rio Frio" NRO Techinical Report. 52. (1996)

M.-A.Holdaway 等人：“Rio Frio 不透明度与地表水蒸气压测量之间的相关性”NRO 技术报告。