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首页> 外文会议>Congress of the international commission for optics: Optics for the next millennium;ICO XVIII >Online fringe tracking and prediction at IOTA
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Online fringe tracking and prediction at IOTA

机译：IOTA的在线边缘跟踪和预测

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摘要

Abstract: The Infrared/Optical Telescope Array (IOTA) is a multi- aperture Michelson interferometer located on Mt. Hopkins near Tucson, Arizona. To enable viewing of fainter targets, an on-line fringe tracking system is presently under development at NASA Ames Research Center. The system has been developed off-line using actual data from IOTA, and is presently undergoing on-line implementation at IOTA. The system has two parts: (1) a fringe tracking system that identifies the center of a fringe packet by fitting a parametric model to the data; and (2) a fringe packet motion prediction system that uses characteristics of past fringe packets to predict fringe packet motion. Combined, this information will be used to optimize on-line the scanning trajectory, resulting in improved visibility of faint targets. Fringe packet identification is highly accurate and robust (99% of the 4000 fringe packets were identified correctly, the remaining 1D were either out of the scan range or too noisy to be seen) and is performed in 30 - 90 milliseconds (depending on desired accuracy) on a Pentium II-based computer. Fringe packet prediction, currently performed using an adaptive linear predictor, delivers a 10% improvement over the baseline of predicting no motion.!0
机译：摘要：红外/光学望远镜阵列（IOTA）是位于山上的多孔径迈克尔逊干涉仪。亚利桑那州图森附近的霍普金斯。为了能够观察到较暗的目标，美国国家航空航天局艾姆斯研究中心目前正在开发一种在线条纹跟踪系统。该系统是使用IOTA的实际数据离线开发的，目前正在IOTA进行在线实施。该系统包括两个部分：（1）条纹跟踪系统，通过将参数模型拟合到数据来识别条纹包的中心； （2）边缘数据包运动预测系统，其使用过去边缘数据包的特征来预测边缘数据包运动。结合使用，此信息将用于优化在线扫描轨迹，从而改善微弱目标的可见性。边缘数据包识别非常准确且可靠（4000个边缘数据包中的99％被正确识别，剩余的1D不在扫描范围内或太嘈杂而看不到），并且在30到90毫秒内执行（取决于所需的准确性） ）在基于Pentium II的计算机上。当前使用自适应线性预测器执行的边缘数据包预测比预测无运动的基线提高了10％。！0

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