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Simulated Lidar Signals for Wake Vortex Detection ahead of the Aircraft

Hirschberger, Markus Christoph and Misaka, Takashi and Holzäpfel, Frank and Horn , Christian (2012) Simulated Lidar Signals for Wake Vortex Detection ahead of the Aircraft. DLR-Forschungsbericht. DLR-FB 2012-02 , 14 S. Deutsches Zentrum für Luft- und Raumfahrt e.V. Bibliotheks- und Informationswesen, Köln.

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Abstract

Within the DLR-project “Wetter & Fliegen“ a feasibility study of airborne lidar sensors for active control at flying through wind shear and turbulent air masses (specifically wake vortices) was carried out. The main goal of such sensors is delivering sufficiently precise real-time measurements of the wind field in a short range in front of an aircraft under clear air conditions up to cruising speed at every altitude, so that a dangerous disturbance in terms of turbulent air motion at an encounter can be alleviated by an active control system with an automatic feed-forward controller. So far, no realized lidar sensor meets the requirements with regard to accuracy, rapidity and spatial resolution of wind measurements necessary for active control. For this reason, we investigate the potential of two suited systems by means of simulations including the physical properties of lidars and atmosphere: a Fringe-Imaging(FI) Doppler Wind Lidar (DWL) similar to the one developed within the project AWIATOR and a Backscatter Lidar (BL) for wind measurements. Though a totally new optical design might be necessary for the latter device to operate at a sufficiently high spatial resolution, the signal processing offers wind components in the y- and z-directions (transversal to the aircraft’s propagation axis x) in very short time. From the results of DWL and BL simulations it turns out to be advisable to combine a Fringe-Imaging DWL for the xcomponent measurements with a BL for the y- and z-component measurements.

Document Type:Monograph (DLR-Forschungsbericht)
Title:Simulated Lidar Signals for Wake Vortex Detection ahead of the Aircraft
Authors:
AuthorsInstitution or Email of Authors
Hirschberger, Markus ChristophDLR
Misaka, TakashiDLR
Holzäpfel, FrankDLR
Horn , ChristianDLR
Date:February 2012
Journal or Publication Title:The DLR Project Wetter & Fliegen
Number of Pages:14
Editors:
EditorsEmail
Gerz, ThomasDLR
Schwarz, CarstenDLR
Publisher:Deutsches Zentrum für Luft- und Raumfahrt e.V. Bibliotheks- und Informationswesen, Köln
ISSN:1434-8454
Status:Published
Keywords:airborne lidar sensors for wind measurements, active control, Doppler Wind Lidar, Backscatter Lidar, simulations
Institution:DLR Institut für Physik der Atmosphäre
Department:Lidar
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Braunschweig , Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Institute of Flight Systems
Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Markus Hirschberger
Deposited On:02 Jul 2012 16:19
Last Modified:02 Jul 2012 16:19

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