Ngaire Underhill

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— Severe weather avoidance programs (SWAP) due to convective weather are common in many of the busiest terminal areas in the US National Airspace System (NAS). In order to make efficient use of available airspace in rapidly evolving convective weather, it is necessary to predict the impacts of the weather on key resources (e.g., departure and arrival routes(More)
This document is disseminated under the sponsorship of the Department of Transportation, Federal Aviation Administration, in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. The planning and execution of the Airport Acceptance Rate (AAR) for major metroplex airports is a complex and(More)
—We have extended an analytical workload model for estimating en route sector capacity to include the impact of convective weather. We use historical weather avoidance data to characterize weather blockage, which affects the sector workload in three ways: (1) Increase in the conflict resolution task rate via reduction in available airspace, (2) increase in(More)
This document is disseminated under the sponsorship of the Department of Transportation, Federal Aviation Administration, in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. The Route Availability Planning Tool (RAPT) operational prototype was deployed to Chicago in the summer of 2010,(More)
The interconnectedness of departure and arrival operations serving multiple top tier airports in the New York area limits departure path possibilities when weather impacts the airspace. As a result, significant convective impacts requires traffic flows to be shifted between pre-established routes to safely depart traffic. This technique, called rerouting,(More)
This document is disseminated under the sponsorship of the Department of Transportation, Federal Aviation Administration, in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. This document presents a preliminary analysis of potential departure delay reduction benefits in New York as the(More)
The RAPT route status algorithm discretizes departure route status into GREEN (clear), YELLOW (impacted), or RED (blocked) 1. How robust is the RAPT route alogrithm when forecast and true weather inputs are compared? 2. During periods of high convective weather volatility, can the mod-CSI scoring algorithm provide a reasonable approximation of forecast(More)
—A critical step in the design and development of new tools and systems for air traffic management is the estimation of potential benefits of the added technology. The current methodology of estimating the added benefit of a new tool is based on a combination of simulation and field observations, requiring either an extensive model of the system or a(More)