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arXiv 1307.0697astro-ph.IM
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LWA1 Radio Telescope的设计和调试

Design and Commissioning of the LWA1 Radio Telescope

S. W. Ellingson, J. Craig, J. Dowell, G. B. Taylor, J. F. Helmboldt

摘要:

LWA 1是一个新的大型射电望远镜阵列,工作频率范围为10-88 MHz,位于新墨西哥州中部。该望远镜由260对偶极型天线组成,其输出被单独数字化并形成波束。同时,来自所有偶极子的信号可以使用望远镜的“所有偶极子”模式之一来记录,从而促进全天成像。该仪器的显著特点包括四个独立可控的波束,利用数字“真时间延迟”波束形成,高固有灵敏度(约6 kJ天顶系统等效通量密度),大瞬时带宽(高达78 MHz),和大视场(约3-10度,取决于频率和指向的天顶距)。本文总结了LWA 1的设计,其性能确定的调试实验,并从早期的科学观察结果证明了仪器的能力。

英文摘要:

LWA1 is a new large radio telescope array operating in the frequency range 10-88 MHz, located in central New Mexico. The telescope consists of 260 pairs of dipole-type antennas whose outputs are individually digitized and formed into beams. Simultaneously, signals from all dipoles can be recorded using one of the telescope's "all dipoles" modes, facilitating all-sky imaging. Notable features of the instrument include four independently-steerable beams utilizing digital "true time delay" beamforming, high intrinsic sensitivity (about 6 kJy zenith system equivalent flux density), large instantaneous bandwidth (up to 78 MHz), and large field of view (about 3-10 degrees, depending on frequency and zenith angle of pointing). This paper summarizes the design of LWA1, its performance as determined in commissioning experiments, and results from early science observations demonstrating the capabilities of the instrument.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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