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Concepts and algorithms for terminal-area traffic managementThe nation's air-traffic-control system is the subject of an extensive modernization program, including the planned introduction of advanced automation techniques. This paper gives an overview of a concept for automating terminal-area traffic management. Four-dimensional (4D) guidance techniques, which play an essential role in the automated system, are reviewed. One technique, intended for on-board computer implementation, is based on application of optimal control theory. The second technique is a simplified approach to 4D guidance intended for ground computer implementation. It generates advisory messages to help the controller maintain scheduled landing times of aircraft not equipped with on-board 4D guidance systems. An operational system for the second technique, recently evaluated in a simulation, is also described.
Document ID
Document Type
Conference Paper
Erzberger, H.
(NASA Ames Research Center Moffett Field, CA, United States)
Chapel, J. D.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
Aircraft Communications And Navigation
Meeting Information
Meeting: 1984 American Control Conference
Location: San Diego, CA
Start Date: June 6, 1984
End Date: June 8, 1984
Accession Number
Distribution Limits

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