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Coherent Pulsed Lidar Sensing of Wake Vortex Position and Strength, Winds and Turbulence in the Terminal AreaNASA Langley Research Center (LaRC) has field tested a 2.0 gm, 100 Hertz, pulsed coherent lidar to detect and characterize wake vortices and to measure atmospheric winds and turbulence. The quantification of aircraft wake-vortex hazards is being addressed by the Wake Vortex Lidar (WVL) Project as part of Aircraft Vortex Spacing System (AVOSS), which is under the Reduced Spacing Operations Element of the Terminal Area Productivity (TAP) Program. These hazards currently set the minimum, fixed separation distance between two aircraft and affect the number of takeoff and landing operations on a single runway under Instrument Meteorological Conditions (IMC). The AVOSS concept seeks to safely reduce aircraft separation distances, when weather conditions permit, to increase the operational capacity of major airports. The current NASA wake-vortex research efforts focus on developing and validating wake vortex encounter models, wake decay and advection models, and wake sensing technologies. These technologies will be incorporated into an automated AVOSS that can properly select safe separation distances for different weather conditions, based on the aircraft pair and predicted/measured vortex behavior. The sensor subsystem efforts focus on developing and validating wake sensing technologies. The lidar system has been field-tested to provide real-time wake vortex trajectory and strength data to AVOSS for wake prediction verification. Wake vortices, atmospheric winds, and turbulence products have been generated from processing the lidar data collected during deployments to Norfolk (ORF), John F. Kennedy (JFK), and Dallas/Fort Worth (DFW) International Airports.
Document ID
20000012986
Document Type
Conference Paper
Authors
Brockman, Philip (NASA Langley Research Center Hampton, VA United States)
Barker, Ben C., Jr. (NASA Langley Research Center Hampton, VA United States)
Koch, Grady J. (NASA Langley Research Center Hampton, VA United States)
Nguyen, Dung Phu Chi (Research Triangle Inst. Hampton, VA United States)
Britt, Charles L., Jr. (Research Triangle Inst. Hampton, VA United States)
Petros, Mulugeta (Science and Technology Corp. Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
November 1, 1999
Publication Information
Publication: Tenth Biennial Coherent Laser Radar Technology and Applications Conference
Subject Category
Fluid Mechanics and Thermodynamics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20000012951Analytic PrimaryTenth Biennial Coherent Laser Radar Technology and Applications Conference
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