Baseline-dependent averaging in radio interferometry

被引：16

作者：

Wijnholds, S. J. ^{[1
]}

Willis, A. G. ^{[2
]}

Salvini, S. ^{[3
]}

机构：

[1] ASTRON, Oude lloogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands

[2] Natl Res Council Canada, POB 248, Penticton, BC V2A 6J9, Canada

[3] Oxford eRes Ctr OeRC, 7 Keble Rd, Oxford OX1 3QG, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 476卷 / 02期

关键词：

instrumentation: interferometers; methods: analytical; methods: numerical; techniques: interferometric;

D O I：

10.1093/mnras/sty360

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This paper presents a detailed analysis of the applicability and benefits of baseline-dependent averaging (BDA) in modern radio interferometers and in particular the Square Kilometre Array. We demonstrate that BDA does not affect the information content of the data other than a well-defined decorrelation loss for which closed form expressions are readily available. We verify these theoretical findings using simulations. We therefore conclude that BDA can be used reliably in modern radio interferometry allowing a reduction of visibility data volume (and hence processing costs for handling visibility data) by more than 80 per cent.

引用

页码：2029 / 2039

页数：11

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