Murchison 宽视场阵列相关器
天体物理仪器与方法
2015-06-23 v1 计算工程、金融与科学
摘要
Murchison 宽视场阵列 (MWA) 是平方公里阵列 (SKA) 的先导项目。该望远镜位于西澳大利亚 (WA) 的 Murchison 射电天文台 (MRO)。MWA 由 4096 个偶极子组成，排列成 128 个双偏振孔径阵列，形成一个连接元件干涉仪，对所有 256 个输入信号进行互相关处理。相关任务采用混合方法，部分处理阶段由基于现场可编程门阵列 (FPGA) 的定制硬件执行，其他阶段则由托管在通用机架式服务器中的图形处理器 (GPU) 执行。所需的相关处理能力约为 8 TFLOPS（每秒万亿次浮点运算）。MWA 已开始运行，相关器每天生成 8.3 TB 的相关产物，随后实时从 MRO 传输 700 公里至珀斯 (WA) 进行存储和离线处理。本文概述了相关器的设计、信号路径和处理元件，并展示了内部和外部接口的数据格式。
引用
@article{arxiv.1501.05992,
title = {The Murchison Widefield Array Correlator},
author = {S. M. Ord and B. Crosse and D. Emrich and D. Pallot and R. B. Wayth and M. A. Clark and S. E. Tremblay and W. Arcus and D. Barnes and M. Bell and G. Bernardi and N. D. R. Bhat and J. D. Bowman and F. Briggs and J. D. Bunton and R. J. Cappallo and B. E. Corey and A. A. Deshpande and L. deSouza and A. Ewell-Wice and L. Feng and R. Goeke and L. J. Greenhill and B. J. Hazelton and D. Herne and J. N. Hewitt and L. Hindson and H. Hurley-Walker and D. Jacobs and M. Johnston-Hollitt and D. L. Kaplan and J. C. Kasper and B. B. Kincaid and R. Koenig and E. Kratzenberg and N. Kudryavtseva and E. Lenc and C. J. Lonsdale and M. J. Lynch and B. McKinley and S. R. McWhirter and D. A. Mitchell and M. F. Morales and E. Morgan and D. Oberoi and A. Offringa and J. Pathikulangara and B. Pindor and T. Prabu and P. Procopio and R. A. Remillard and J. Riding and A. E. E. Rogers and A. Roshi and J. E. Salah and R. J. Sault and N. Udaya Shankar and K. S. Srivani and J. Stevens and R. Subrahmanyan and S. J. Tingay and M. Waterson and R. L. Webster and A. R. Whitney and A. Williams and C. L. Williams and J. S. B. Wyithe},
journal= {arXiv preprint arXiv:1501.05992},
year = {2015}
}
备注
17 pages, 9 figures. Accepted for publication in PASA. Some figures altered to meet astro-ph submission requirements