The Breakthrough Listen Search for Intelligent Life: A Wideband Data Recorder System for the Robert C. Byrd Green Bank Telescope
The Breakthrough Listen Search for Intelligent Life: A Wideband Data Recorder System for the Robert C. Byrd Green Bank Telescope
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DOI：
10.1088/1538-3873/aa80d2
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发表时间：
2018-04-01
影响因子：
3.5
通讯作者：
Woody, Dave
中科院分区：
文献类型：
--
作者：
MacMahon, David H. E.;Price, Danny C.;Woody, Dave
突破聆听倡议正在全面搜寻来自地外文明的无线电和光学特征。该项目的一个组成部分是宽带数据记录器和信号处理系统的设计和实施。这些系统的能力，特别是在无线电频率上的能力，直接决定了调查速度;此外，在固定的观测时间和频谱覆盖范围内，它们也决定了灵敏度。在这里，我们详细介绍了突破听宽带数据记录系统部署在100米口径罗伯特C。伯德绿色银行望远镜。该系统对两种极化的8位带宽进行数字化，最高可达6 GHz，并将生成的24 GB s（-1）数据存储到磁盘。该系统是射电天文学中使用的数据速率最高的基带记录系统之一。未来的系统扩展将使记录容量加倍，以在两个极化中实现12 GHz的总奈奎斯特带宽。在本文中，我们将详细介绍该系统的体系结构，沿着的突出配置和磁盘写入优化，用于实现高吞吐量的数据捕获的商品计算服务器和消费类硬盘驱动器。
The Breakthrough Listen Initiative is undertaking a comprehensive search for radio and optical signatures from extraterrestrial civilizations. An integral component of the project is the design and implementation of wide-bandwidth data recorder and signal processing systems. The capabilities of these systems, particularly at radio frequencies, directly determine survey speed; further, given a fixed observing time and spectral coverage, they determine sensitivity as well. Here, we detail the Breakthrough Listen wide-bandwidth data recording system deployed at the 100 m aperture Robert C. Byrd Green Bank Telescope. The system digitizes up to 6 GHz of bandwidth at 8 bits for both polarizations, storing the resultant 24 GB s(-1) of data to disk. This system is among the highest data rate baseband recording systems in use in radio astronomy. A future system expansion will double recording capacity, to achieve a total Nyquist bandwidth of 12 GHz in two polarizations. In this paper, we present details of the system architecture, along with salient configuration and disk-write optimizations used to achieve high-throughput data capture on commodity compute servers and consumer-class hard disk drives.