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Airborne forward-pointing UV Rayleigh lidar for remote clear air turbulence detection: system design and performance

Vrancken, Patrick and Wirth, Martin and Ehret, Gerhard and Barny, Hervé and Rondeau, Philippe and Veermann, Henk (2016) Airborne forward-pointing UV Rayleigh lidar for remote clear air turbulence detection: system design and performance. Applied Optics, 55 (32), pp. 9314-9328. Optical Society of America. DOI: 10.1364/AO.55.009314 ISSN 1559-128X

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Official URL: http://ao.osa.org/abstract.cfm?URI=ao-55-32-9314

Abstract

A high-performance airborne UV Rayleigh lidar system was developed within the European project DELICAT. With its forward-pointing architecture, it aims at demonstrating a novel detection scheme for clear air turbulence (CAT) for an aeronautics safety application. Due to its occurrence in clear and clean air at high altitudes (aviation cruise flight level), this type of turbulence evades microwave radar techniques and in most cases coherent Doppler lidar techniques. The present lidar detection technique relies on air density fluctuation measurement and is thus independent of backscatter from hydrometeors and aerosol particles. The subtle air density fluctuations caused by the turbulent air flow demand exceptionally high stability of the setup and in particular of the detection system. This paper describes an airborne test system for the purpose of demonstrating this technology and turbulence detection method: a high-power UV Rayleigh lidar system is installed on a research aircraft in a forward-looking configuration for use in cruise flight altitudes. Flight test measurements demonstrate this unique lidar system being able to resolve air density fluctuations occurring in light-to-moderate CAT at 5 km or moderate CAT at 10 km distance. A scaling of the determined stability and noise characteristics shows that such performance is adequate for an application in commercial air transport.

Item URL in elib:https://elib.dlr.de/107638/
Document Type:Article
Title:Airborne forward-pointing UV Rayleigh lidar for remote clear air turbulence detection: system design and performance
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vrancken, PatrickDLR, IPAhttps://orcid.org/0000-0003-2364-5576
Wirth, MartinDLR, IPAUNSPECIFIED
Ehret, GerhardDLR, IPAUNSPECIFIED
Barny, HervéTHALES AvionicsUNSPECIFIED
Rondeau, PhilippeTHALES AvionicsUNSPECIFIED
Veermann, HenkNLR, The NetherlandsUNSPECIFIED
Date:November 2016
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:55
DOI :10.1364/AO.55.009314
Page Range:pp. 9314-9328
Publisher:Optical Society of America
Series Name:Applied Optics
ISSN:1559-128X
Status:Published
Keywords:Atmospheric turbulence; Lidar; Turbulence; Lidar; Turbulence; Scattering, Rayleigh
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Vrancken, Dr. Patrick
Deposited On:14 Nov 2016 07:27
Last Modified:31 Jul 2019 20:04

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