利用卫星对明安图射电频谱日像仪的相位校准研究
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摘要
明安图射电频谱日像仪采用综合孔径技术成像的太阳专用射电望远镜,为充分利用望远镜天线单元数量,采用非冗余基线设计,这就要求需要外部信号源进行系统校准.本文介绍了利用同步轨道卫星作为校准源,对明安图射电频谱日像仪进行相位校准的原理,过程和相应的观测结果,分析了卫星作为校准的优缺点、处理办法以及在对图像质量的影响.
Mingantu Spectral Radioheliograph(MUSER) is a solar dedicated interferometric array using synthetic aperture imaging technology.There aren't redundant baselines in MUSER in order to make full use of these antennas,which requires an external signal source to carry out system calibration.This paper describes phase calibration of MUSER by using the geostationary satellite as calibrator.Some observations and results are introduced as well.We analyzed the advantages and disadvantages of the satellite as a calibrator,as well as the effect on image quality.
Mingantu Spectral Radioheliograph(MUSER) is a solar dedicated interferometric array using synthetic aperture imaging technology.There aren't redundant baselines in MUSER in order to make full use of these antennas,which requires an external signal source to carry out system calibration.This paper describes phase calibration of MUSER by using the geostationary satellite as calibrator.Some observations and results are introduced as well.We analyzed the advantages and disadvantages of the satellite as a calibrator,as well as the effect on image quality.
引文
[1] 颜毅华,张坚,黄光力.厘米-分米波高分辨频谱日像仪——项目建议书[R].北京:中国科学院国家天文台,2003.
[2] Yan Yihua,Jian Zhang,Wei Wang,Fei Liu,Zhijun Chen,Guoshu Ji.The Chinese spectral radioheliograph-CSRH[J].Earth Moon Planet,2009,104(1-4):97-100.
[3] 王绶琯,吴盛殷,崔振兴,等.射电天文方法[M].北京:科学出版社,1988.
[4] AR Thompson,JM Moran,GW Swenson Jr.Interferometry and Synthesis in Radio Astronomy[M].New York:Wiley,2001.86-90.
[5] Nakajima H,Nishio M,Enome S,et al.The nobeyama radioheliograph[J].Proceedings of IEEE,1994,82(5):705-713.
[6] The Radioheliograph Group.The Nancay multifrequency radioheliograph:New developments and data acquisitionfor the solar physics community[J].Advances in Space Research,1993,13(9):411-414.
[7] Wang W,Yan Y H,Liu D H,Chen Z J,Su C,Liu F,Geng L H,Chen L J,Du J.Calibration and data processing for a chinese spectral radioheliograph in the decimeter wave range[J].PASJ,2013,65(sp1):s18-1-s18-5.
[8] 刘东浩,颜毅华,赵岸,王威.新一代厘米分米波射电日像仪系统延时校准方法研究[J].电子学报,2013,41(3):570-574.Liu Dong-hao,Yan Yi-hua,Zhao An,Wang Wei.A delay calibration for Chinese spectral radioheliograph in the decimetric to centimetric wave range[J].Acta Electronica Sinica,2013,41(3):570-574.
[9] G B Taylor,C L Carilli,RA Perley.Synthesis Imaging in Radio Astronomy-II[M].California:Astronomical Society of Pacific,1999.
[2] Yan Yihua,Jian Zhang,Wei Wang,Fei Liu,Zhijun Chen,Guoshu Ji.The Chinese spectral radioheliograph-CSRH[J].Earth Moon Planet,2009,104(1-4):97-100.
[3] 王绶琯,吴盛殷,崔振兴,等.射电天文方法[M].北京:科学出版社,1988.
[4] AR Thompson,JM Moran,GW Swenson Jr.Interferometry and Synthesis in Radio Astronomy[M].New York:Wiley,2001.86-90.
[5] Nakajima H,Nishio M,Enome S,et al.The nobeyama radioheliograph[J].Proceedings of IEEE,1994,82(5):705-713.
[6] The Radioheliograph Group.The Nancay multifrequency radioheliograph:New developments and data acquisitionfor the solar physics community[J].Advances in Space Research,1993,13(9):411-414.
[7] Wang W,Yan Y H,Liu D H,Chen Z J,Su C,Liu F,Geng L H,Chen L J,Du J.Calibration and data processing for a chinese spectral radioheliograph in the decimeter wave range[J].PASJ,2013,65(sp1):s18-1-s18-5.
[8] 刘东浩,颜毅华,赵岸,王威.新一代厘米分米波射电日像仪系统延时校准方法研究[J].电子学报,2013,41(3):570-574.Liu Dong-hao,Yan Yi-hua,Zhao An,Wang Wei.A delay calibration for Chinese spectral radioheliograph in the decimetric to centimetric wave range[J].Acta Electronica Sinica,2013,41(3):570-574.
[9] G B Taylor,C L Carilli,RA Perley.Synthesis Imaging in Radio Astronomy-II[M].California:Astronomical Society of Pacific,1999.