Cramér-Rao sensitivity limits for astronomical instruments: implications for interferometer design.
Cramér-Rao sensitivity limits for astronomical instruments: implications for interferometer design.
复制标题
天文仪器的 Cramér-Rao 灵敏度限制：对干涉仪设计的影响。
DOI：
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发表时间：
2003
影响因子：
1.9
通讯作者：
J. Zmuidzinas
中科院分区：
文献类型：
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作者：
J. Zmuidzinas
Multiple-telescope interferometry for high-angular-resolution astronomical imaging in the optical-IR-far-IR bands is currently a topic of great scientific interest. The fundamentals that govern the sensitivity of direct-detection instruments and interferometers are reviewed, and the rigorous sensitivity limits imposed by the Cramér-Rao theorem are discussed. Numerical calculations of the Cramér-Rao limit are carried out for a simple example, and the results are used to support the argument that interferometers that have more compact instantaneous beam patterns are more sensitive, since they extract more spatial information from each detected photon. This argument favors arrays with a larger number of telescopes, and it favors all-on-one beam-combining methods as compared with pairwise combination.
