Microwave Imaging Spectroscopy with the Owens Valley Solar Array

欧文斯谷太阳能电池阵列的微波成像光谱

• 批准号: 0908344
• 负责人: Dale Gary
• 金额: $ 89.06万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0908344&HistoricalAwards=false
• 关键词: Microwave; Imaging; Spectroscopy; Owens; Valley

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This program will enable continuing operations of the Owens Valley Solar Array (OVSA), a university-based solar-dedicated radio imaging array. It will provide partial support for the personnel on the site at Owens Valley Radio Observatory (Big Pine, CA), and for graduate student and postdoctoral research. It also provides funds to maintain the web interface that provides data to the scientific community. This award will support an instrumental upgrade that will leverage recent advances by Dr. Gary's group and provide a substantial boost in array performance. As the only solar-dedicated radio instrument in the United States, continued operation of the instrument will, through its unique combination of imaging and spectral coverage, provide quantitative physical measurements of solar particles and magnetic fields in thousands of solar flares expected as a new solar cycle ramps up toward its 2011 peak. The award will also support two areas of solar radio research: 1) determination of the three-dimensional coronal structure of particles and fields in flaring loops, through theory, modeling, and observations in both radio and hard X-rays, and 2) the first true imaging of decimetric bursts with the resolution needed to follow their temporal and spectral dynamics, utilizing the unique capabilities of the upgraded OVSA. Dr. Gary and his group will also continue to work on the effects of solar radio bursts on wireless communication and navigation systems, and on methods for detecting and excising radio frequency interference. In addition to these efforts, continued operation of OVSA during this period will provide for new observations to be used by the solar community, including collaborative observations with space instruments in support of which NASA funds have already been received. The OVSA facilities provide a test bed for prototyping of antennas, feeds, and analog and digital systems for the Frequency Agile Solar Radiotelescope (FASR), which will be a national facility. The design and development for FASR includes participation by the National Radio Astronomy Observatory, New Jersey Institute of Technology (NJIT), University of Michigan, University of Maryland, University of California Berkeley and Caltech. The OVSA data are used by scientists world-wide to add unique information in their studies of the Sun and solar activity. OVSA observations have proven critical in the discovery and understanding of the direct impacts of solar radio bursts on cell-phone communication and on navigation systems such as the Global Positioning System. The OVSA data provide research projects for undergraduate and graduate students at NJIT and elsewhere. Currently, three NJIT graduate students are doing Ph.D. research using OVSA. NJIT is an urban school, in downtown Newark, NJ.

该奖项由2009年美国复苏和再投资法案(公法111-5)资助。该计划将使欧文斯山谷太阳能阵列(OVSA)继续运营，这是一种基于大学的太阳能专用无线电成像阵列。它将为欧文斯山谷射电天文台(加利福尼亚州大松市)现场的工作人员以及研究生和博士后研究提供部分支持。它还为维护向科学界提供数据的网络界面提供资金。该奖项将支持仪器升级，该升级将利用Gary博士团队的最新进展，并大幅提升阵列性能。作为美国唯一的太阳专用无线电仪器，该仪器的持续运行将通过其独特的成像和光谱覆盖相结合的方式，提供对预计将在2011年达到顶峰的新一轮太阳周期中数千次太阳耀斑中的太阳粒子和磁场的定量物理测量。该奖项还将支持太阳射电研究的两个领域：1)通过射电和硬X射线的理论、建模和观测，确定耀斑环中粒子和场的三维日冕结构；2)利用升级后的OVSA的独特能力，以跟踪其时间和频谱动力学所需的分辨率，首次对分米级爆发进行真实成像。加里博士和他的团队还将继续研究太阳射电爆发对无线通信和导航系统的影响，以及检测和消除无线电频率干扰的方法。除这些努力外，在此期间继续运作全球海洋观测系统将为太阳能界提供新的观测，包括与空间仪器合作观测，美国航天局已收到资金。OVSA设施为频率捷变太阳射电望远镜(FAIR)的天线、馈电以及模拟和数字系统的原型提供了一个试验台，该望远镜将成为一个国家设施。FAIR的设计和开发包括国家射电天文台、新泽西理工学院、密歇根大学、马里兰大学、加州大学伯克利分校和加州理工大学的参与。OVSA数据被世界各地的科学家用来在他们对太阳和太阳活动的研究中添加独特的信息。事实证明，欧空局的观测对于发现和了解太阳射电爆发对手机通信和全球定位系统等导航系统的直接影响至关重要。OVSA的数据为NJIT和其他地方的本科生和研究生提供了研究项目。目前，三名NJIT研究生正在使用OVSA进行博士研究。NJIT是一所城市学校，位于新泽西州纽瓦克市中心。