标题： 扩展的甚大天线阵列 显示英文标题

标题： The Expanded Very Large Array

摘要： 在近30年的运行中，甚大阵列（VLA）已被证明是一个非常灵活且高效的射电望远镜。 然而，自VLA设计以来，其基本能力变化不大。 目前正在利用现代技术进行一项重大扩展，以至少提高一个数量级的灵敏度和频率覆盖范围。 扩展的甚大阵列（EVLA）项目的主要组成部分包括用于从1到50 GHz连续频率覆盖的新或升级的接收器，用于从每个天线传输总带宽为16 GHz信号的新本地振荡器、中频和宽带数据传输系统，以及一个新的数字相关器，该相关器能够以前所未有的频率通道数处理此带宽，适用于成像阵列。 还包括一个新的监控和控制系统以及新的软件，将提供望远镜的易用性。 EVLA计划于2012年完成，将为世界研究界提供一个灵活、强大、通用的望远镜，以解决当前和未来的天文学问题。 显示英文摘要

摘要： In almost 30 years of operation, the Very Large Array (VLA) has proved to be a remarkably flexible and productive radio telescope. However, the basic capabilities of the VLA have changed little since it was designed. A major expansion utilizing modern technology is currently underway to improve the capabilities of the VLA by at least an order of magnitude in both sensitivity and in frequency coverage. The primary elements of the Expanded Very Large Array (EVLA) project include new or upgraded receivers for continuous frequency coverage from 1 to 50 GHz, new local oscillator, intermediate frequency, and wide bandwidth data transmission systems to carry signals with 16 GHz total bandwidth from each antenna, and a new digital correlator with the capability to process this bandwidth with an unprecedented number of frequency channels for an imaging array. Also included are a new monitor and control system and new software that will provide telescope ease of use. Scheduled for completion in 2012, the EVLA will provide the world research community with a flexible, powerful, general-purpose telescope to address current and future astronomical issues.