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

该项目将为来自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。 提出的实时处理的一些算法将适应现有的后处理算法，而有些将是从头开始。目前多通道数字接收机原型的扩展将允许采用更加灵活的信号处理方法，新的信号处理算法的开发将推动对流星、电离层扰动和流星的研究。 正在开发的技术可以更好地分离非相干和相干散射的雷达回波，并将用于研究电离层、流星和绕太阳运行的物体中的短周期波和不稳定性。 相干返回将用于确定流星和日心轨道上其他物体的轨道，并区分太阳系外的流星。 自动流星探测算法将扩大到四通道干涉测量法，以提供比单独使用主波束所能确定的更准确的流星轨迹，并更好地识别流星事件的全部频谱。 为了提高观测站的效用，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中接收到的信号。 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，其中的工作由宾夕法尼亚州立大学的阿雷西博天文台和位于杰纳西奥的纽约的州立大学分担。

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.