NASA - National Aeronautics and Space Administration
Follow this link to skip to the main content
+ Visit
+ Contact NASA

+ Home
Aviation Systems
Search Aviation Systems

07.24.07 Division Highlights

Ground-based and cockpit-based separation assurance interaction analysis: The Tactical Separation Assisted Flight Environment (TSAFE) is an independent, ground-based system proposed for the next-generation air transportation system. TSAFE is designed to identify and solve problems in less than 2 minutes to the loss of separation. TCAS (Traffic alert and Collision Avoidance System) is an on-board aircraft system used to detect and avoid aircraft collisions, independent of the ground systems, and which is triggered at less than about 45 seconds before collision. Real aircraft conflict incident data, in which TCAS was triggered, were analyzed using a stand-alone TSAFE system in which simple TCAS logic was integrated into the TSAFE conflict resolution algorithms. This preliminary analysis demonstrates that this integration of TCAS logic is a simple and effective means of avoiding potential TCAS and TSAFE interference within the time horizon in which both conflict detection and resolution capabilities would be active. A more detailed implementation of the algorithms and more analysis of real data are proceeding.

+ Back to Top
New Automatic Conflict Resolution Software in CTAS: New conflict resolution software that automatically detects and solves aircraft-to-aircraft conflicts has been completed for the Center-TRACON Automation System (CTAS) and is being evaluated by researchers. The conflict resolution solution can be sent as a flight plan amendment and automatically flown by an air traffic control radar target generator in a simulation environment.

+ Back to Top
Continued analysis of pilot behavior in congested terminal areas during severe weather: An analysis of pilot behavior during severe weather is continuing by examining precipitation and echo-top height against the expected number of aircraft in a particular grid cell. While the preliminary results confirm prior findings that as precipitation intensity increases, fewer pilots fly through such airspace, results also have shown some deviation from previous studies, which only examined individual aircraft trajectories and a more limited range of weather conditions. The analysis has indicated that only when precipitation intensity is high, fewer pilots will fly through a given section of airspace as cloud height increases. Storm cloud height is a significant explanatory variable in modeling aircraft operations, even when differences between cloud heights and aircraft altitudes had already been taken into account. Finally, some data show that when clouds are higher than 30,000 feet, there was no evidence that the percentage of pilots willing to fly through the storm activity increased with flight level. These findings will have implications for aircraft routing under varying weather conditions.

+ Back to Top
Generic Sector Design Working Meeting: NASA researchers and FAA operational experts held a working meeting focused on generic airspace. The purpose of the meeting was to identify characteristics of a future generic sector. They discussed characteristics that would be desired and undesired for a sector, and they discussed several functions, tasks, and structures that could be simplified or automated for future operations to make airspace and controllers interchangeable. Examples of these include: depiction of unusable airspace, better airspace naming/referencing convention, and airspace and corresponding frequency information. The participants believed that in the beginning such airspace could be designed for high altitude airspace where there is more homogeneity of aircraft performance.

+ Back to Top
Joint Army/NASA meeting on rapid battlefield deconfliction: The US Army Aeroflightdynamics Directorate hosted a meeting at Ames Research Center on July 17-18 to discuss developing an Army Aviation strategy that could bring together assets within the Army and NASA to address key issues in the area of Rapid Battlespace Deconfliction, including Networked Fires, Airspace Management, and Air Defense. The purpose of this initial meeting was to review and discuss critical issues, gaps and requirements, identify facilities, capabilities, areas of expertise, and roles and missions of all participating organizations, and to outline an overall strategic approach for potential Army funding of the effort.

+ Back to Top
FirstGov - Your First Click to the US Government
+ Freedom of Information Act
+ Budgets, Strategic Plans and Accountability Reports
+ The President's Management Agenda
+ NASA Privacy Statement, Disclaimer,
and Accessibility Certification

+ Inspector General Hotline
+ Equal Employment Opportunity Data Posted Pursuant
to the No Fear Act

+ Information-Dissemination Priorities and Inventories
+ NASA Privacy Statement
NASA - National Aeronautics and Space Administration
NASA Official:
Last Updated: November 7, 2018

+ Contact Us
+ About This Site

+ Download Acrobat Reader