Frequency Reference Stability and Coherence Loss in Radio Astronomy Interferometers Application to the SKA-猫眼课题宝

SKA 射电天文干涉仪应用中的频率参考稳定性和相干损耗

DOI：

10.1142/s2251171718500010

发表时间：

2018

期刊：

arXiv: Instrumentation and Methods for Astrophysics

影响因子：

通讯作者：

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作者：

B. Alachkar;A. Wilkinson;K. Grainge

平方公里天线阵（SKA）作为射电天文干涉仪，其频率基准的稳定性要求是由频率基准的不稳定性引起的相干损失的最大可接受程度。本文分析了射电天文台阵频率基准不稳定性的表征与相干损失之间的关系。从阿伦偏差给出的不稳定性特性的相干损失的计算进行了审查。一些实际的方面和局限性进行了分析。

The requirements on the stability of the frequency reference in the Square Kilometre Array (SKA), as a radio astronomy interferometer, are given in terms of maximum accepted degree of coherence loss caused by the instability of the frequency reference. In this paper we analyse the relationship between the characterisation of the instability of the frequency reference in the radio astronomy array and the coherence loss. The calculation of the coherence loss from the instability characterisation given by the Allan deviation is reviewed. Some practical aspects and limitations are analysed.

Square Kilometre Array: The radio telescope of the XXI century

DOI： 10.1134/s1063772917040059

发表时间： 2017-04

期刊：

Astronomy Reports

影响因子： 1

作者：

Keith Grainge;B. Alachkar;S. W. Amy;Domingos Barbosa;Murali Bommineni;P. Boven;Ralph Braddock;J. Davis;Praveen Diwakar;Vishal Francis;Robert Gabrielczyk;R. Gamatham;Simon Garrington;T. Gibbon;D. Gozzard;Simon R. Gregory;Yicheng Guo;Yashwant Gupta;J. Hammond;D. Hindley;Uli Horn;R. Hughes-Jones;Michelle Hussey;Samantha Lloyd;Siju Mammen;Simeon Miteff;V. Mohile;Jaco Muller;SwamI Natarajan;John Nicholls;Richard Oberland;Michael Pearson;Tim Rayner;S. Schediwy;R. Schilizzi;Supriya Sharma;S. Stobie;Mark Tearle;Bo Wang;Bruce G. Wallace;Lijun Wang;Rajesh Warange;Richard Whitaker;A. Wilkinson;Neil Wingfield

通讯作者：

Frequency Reference Stability and Coherence Loss in Radio Astronomy Interferometers Application to the SKA

SKA 射电天文干涉仪应用中的频率参考稳定性和相干损耗

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