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Optical design of the NASA-NSF extreme precision Doppler spectrograph concept 'WISDOM'

机译:Nasa-NsF极端精密多普勒频谱仪概念“WIsDOm”的光学设计

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摘要

The runway configuration is the set of the runways at an airport that are used for arrivals and departures at any time. While many factors, including weather, expected demand, environmental considerations, and coordination of flows with neighboring airports, influence the choice of runway configuration, the actual selection decision is made by air traffic controllers in the airport tower. As a result, the capacity of an airport at any time is dependent on the behavior of human decision makers. This paper develops a statistical model to characterize the configuration selection decision process using empirical observations. The proposed approach, based on the discrete-choice modeling framework, identifies the influence of various factors in terms of the utility function of the decision maker. The parameters of the utility functions are estimated through likelihood maximization. Correlations between different alternatives are captured using a multinomial “nested logit” model. A key novelty of this study is the quantitative assessment of the effect of inertia, or the resistance to configuration changes, on the configuration selection process. The developed models are used to predict the runway configuration 3 h ahead of time, given operating conditions such as wind, visibility, and demand. Case studies based on data from Newark (EWR) and LaGuardia (LGA) airports show that the proposed model predicts runway configuration choices significantly better than a baseline model that only considers the historical frequencies of occurrence of different configurations.
机译:跑道配置是机场中随时用于进场和离场的跑道的集合。尽管许多因素(包括天气,预期需求,环境因素以及与相邻机场的流量协调)会影响跑道配置的选择,但实际的选择决定是由机场塔楼的空中交通管制员做出的。结果,机场在任何时候的运力都取决于人类决策者的行为。本文开发了一个统计模型,以通过经验观察来表征配置选择决策过程。所提出的方法基于离散选择建模框架,根据决策者的效用函数确定了各种因素的影响。通过似然最大化估计效用函数的参数。使用多项式“嵌套对数”模型捕获不同替代方案之间的相关性。这项研究的一个关键新颖之处是对惯性或构型变化阻力对构型选择过程的影响进行定量评估。在给定运行条件(例如风,能见度和需求)的情况下,开发的模型用于提前3小时预测跑道配置。根据来自纽瓦克(EWR)和拉瓜迪亚(LGA)机场的数据进行的案例研究表明,与仅考虑不同配置发生的历史频率的基线模型相比,所提出的模型预测的跑道配置选择要好得多。

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