A New type of interferometer for use in radio astronomy
A New type of interferometer for use in radio astronomy
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DOI：
10.1080/14786440708520475
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发表时间：
1954-07
期刊：
影响因子：
--
通讯作者：
R. H. Brown;R. Twiss
中科院分区：
文献类型：
--
作者：
R. H. Brown;R. Twiss
摘要介绍了一种用于测量离散射电源直径的新型干涉仪，并给出了其数学原理。该仪器的原理是基于基线两端两个独立接收器的整流输出之间的相关性，并且表明这些输出之间的互相关系数与整个源的强度分布的傅里叶变换幅度的平方成正比。分析表明，在极长的基线上操作新仪器应该是可能的，并且它应该几乎不受电离层不规则性的影响。
Summary A new type of interferometer for measuring the diameter of discrete radio sources is described and its mathematical theory is given. The principle of the instrument is based upon the correlation between the rectified outputs of two independent receivers at each end of a baseline, and it is shown that the cross-correlation coefficient between these outputs is proportional to the square of the amplitude of the Fourier transform of the intensity distribution across the source. The analysis shows that it should be possible to operate the new instrument with extremely long baselines and that it should be almost unaffected by ionospheric irregularities.