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.

开发了几种技术并实际测试了以有效校正毫米和亚毫米波无线电干涉仪的对流层相位波动，包括​​非常长的基线干涉法（VLBI）； 1）辐射相校正方法，2）配对的天线法和3）快速切换方法。它是从实验中使用Nobeyama毫米阵列（NMA）发现的，并且是所谓的无线电查看监视器，即配对的天线方法和快速开关方法对于CM波观测的相位校正非常有效。另一方面，通过使用新开发的高精度辐射仪在220GHz（安装在NMA上的新开发的高精度辐射计）的实验，发现辐射相校正对于校正毫米和亚毫米波的相位波动非常有用。

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。

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。

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）。

Tetsuo Sasao: "Compensation of Atmospheric Phase Fluctuations with the Paired Antenna Methods" in preparation.

Tetsuo Sasao：“用配对天线方法补偿大气相位波动”正在准备中。