MWAX: A new correlator for the Murchison Widefield Array

IF 4.5 3区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of Australia Pub Date : 2023-03-21 DOI:10.1017/pasa.2023.15

I. Morrison, B. Crosse, G. Sleap, R. Wayth, A. Williams, M. Johnston-Hollitt, J. Jones, S. Tingay, M. Walker, L. Williams

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引用次数: 1

Abstract

Abstract We describe the design, validation, and commissioning of a new correlator termed ‘MWAX’ for the Murchison Widefield Array (MWA) low-frequency radio telescope. MWAX replaces an earlier generation MWA correlator, extending correlation capabilities and providing greater flexibility, scalability, and maintainability. MWAX is designed to exploit current and future Phase II/III upgrades to MWA infrastructure, most notably the simultaneous correlation of all 256 of the MWA’s antenna tiles (and potentially more in future). MWAX is a fully software-programmable correlator based around an ethernet multicast architecture. At its core is a cluster of 24 high-performance GPU-enabled commercial-off-the-shelf compute servers that together process in real-time up to 24 coarse channels of 1.28 MHz bandwidth each. The system is highly flexible and scalable in terms of the number of antenna tiles and number of coarse channels to be correlated, and it offers a wide range of frequency/time resolution combinations to users. We conclude with a roadmap of future enhancements and extensions that we anticipate will be progressively rolled out over time.

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MWAX:一种新的默奇森宽场阵列相关器

摘要:我们描述了默奇森宽场阵列(MWA)低频射电望远镜的一种名为“MWAX”的新型相关器的设计、验证和调试。MWAX取代了较早一代的MWA相关器，扩展了相关功能并提供了更大的灵活性、可伸缩性和可维护性。MWAX旨在利用当前和未来的第二/第三阶段升级到MWA基础设施，最值得注意的是所有256个MWA天线瓦片的同时相关(未来可能会有更多)。MWAX是基于以太网多播架构的完全软件可编程相关器。它的核心是一个由24个高性能gpu支持的商用现成计算服务器组成的集群，这些服务器一起实时处理多达24个粗通道，每个通道带宽为1.28 MHz。该系统在天线瓦片数量和需要关联的粗信道数量方面具有高度的灵活性和可扩展性，并为用户提供了广泛的频率/时间分辨率组合。最后，我们给出了未来增强和扩展的路线图，我们预计这些增强和扩展将随着时间的推移逐步推出。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Publications of the Astronomical Society of Australia 地学天文-天文与天体物理

CiteScore

5.90

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： Publications of the Astronomical Society of Australia (PASA) publishes new and significant research in astronomy and astrophysics. PASA covers a wide range of topics within astronomy, including multi-wavelength observations, theoretical modelling, computational astronomy and visualisation. PASA also maintains its heritage of publishing results on southern hemisphere astronomy and on astronomy with Australian facilities. PASA publishes research papers, review papers and special series on topical issues, making use of expert international reviewers and an experienced Editorial Board. As an electronic-only journal, PASA publishes paper by paper, ensuring a rapid publication rate. There are no page charges. PASA''s Editorial Board approve a certain number of papers per year to be published Open Access without a publication fee.