ITR-(ASE)-(int): Development of Efficient Real-Time Multi-mode Data Assimilation and Analysis Techniques for the Arecibo and Related Geophysical Radar Systems

ITR-(ASE)-(int)：为阿雷西博及相关地球物理雷达系统开发高效实时多模式数据同化和分析技术

• 批准号: 0427029
• 负责人: John Mathews
• 金额: --
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0427029&HistoricalAwards=false
• 关键词: ITR; ASE; int; Development; Efficient

This project will develop digital signal conversion and processing techniques for the signal from the Arecibo Observatory radar and astronomy systems. Some of the algorithms proposed for real-time processing will be adapted from existing post-processing algorithms while some will be de novo. The extension of the current multi-channel digital receiver prototype will permit much more flexible approaches to signal processing and the development of new signal processing algorithms will advance the study of meteors, ionospheric disturbances and pulsars. The techniques being developed eill permit better separation of incoherently and coherently scattered radar returns and will be used to examine short-period waves and instabilities in the ionosphere, meteors, and objects orbiting around the sun. Coherent returns will be used to determine the orbits of meteors and other objects in heliocentric orbits, and to distinguish meteors of extra-solar origin. Automatic meteor detection algorithms will be extended to four-channel interferometry to provide more accurate meteor trajectories than can be determined using the main beam alone and better identification of the full spectrum of meteor events. To increase the utility of the observatory, a pulsar search algorithm will be developed that can be used when the pulsed radar is operating. This will analyze the signals received in the intervals between pulse transmissions. The project will take advantage of the higher bandwidth of modern internet connections and develop a data analysis system in which the work is distributed between Arecibo Observatory, Pennsylvania State University and the State University of New York at Geneseo.

该项目将为阿雷西博天文台雷达和天文系统的信号开发数字信号转换和处理技术。 为实时处理提出的一些算法将改编自现有的后处理算法，而另一些则将从头开始。当前多通道数字接收器原型的扩展将允许更灵活的信号处理方法，并且新信号处理算法的开发将推进流星、电离层扰动和脉冲星的研究。 正在开发的技术将允许更好地分离非相干和相干散射雷达回波，并将用于检查电离层、流星和绕太阳运行的物体中的短周期波和不稳定性。 相干回波将用于确定日心轨道中流星和其他物体的轨道，并区分太阳系外起源的流星。 自动流星探测算法将扩展到四通道干涉测量，以提供比单独使用主光束确定的流星轨迹更准确的流星轨迹，并更好地识别流星事件的全谱。 为了提高天文台的实用性，将开发一种脉冲星搜索算法，可在脉冲雷达运行时使用。 这将分析在脉冲传输之间的间隔内接收到的信号。 该项目将利用现代互联网连接的更高带宽，开发一个数据分析系统，该系统的工作分布在阿雷西博天文台、宾夕法尼亚州立大学和纽约州立大学杰纳西奥分校之间。