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Development and test of a UV lidar receiver for the measurement of wind velocities aiming at the near-range characterization of wake vortices and gusts in clear air

Herbst, Jonas (2019) Development and test of a UV lidar receiver for the measurement of wind velocities aiming at the near-range characterization of wake vortices and gusts in clear air. Dissertation, Ludwigs-Maximilians-Universität München.

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Abstract

Gusts and wake vortices are a major cause of comfort degradations, incidents, and efficiency-reducing structure reserves in air traffic nowadays. Concepts for the automatic feed-forward control of these turbulences, i.a. during cruising flight, require highly-resolved near-range measurements of wind speeds in atmospheric regions with low aerosol concentrations. For this purpose a lidar receiver for uniaxial measurements is developed and tested in this thesis. A comparison of existing Doppler wind lidar concepts with respect to the requirements yields a fringe-imaging Michelson interferometer combined with a fast linear detector array. Monolithic design and fiber coupling aim at thermo-mechanical stability. The concept is evaluated through calculations and end-to-end simulations. The receiver prototype is then implemented and characterized in the laboratory. First ground-based measurements in spring 2018 are carried out in comparison to a commercial coherent lidar, revealing precise, range-resolved performance, whereby temporally variable systematic errors occur. Further improvements are necessary for alleviating wake vortex encounters.

Item URL in elib:https://elib.dlr.de/131461/
Document Type:Thesis (Dissertation)
Title:Development and test of a UV lidar receiver for the measurement of wind velocities aiming at the near-range characterization of wake vortices and gusts in clear air
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Herbst, JonasDLR, IPAhttps://orcid.org/0000-0002-0280-8228
Date:2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:255
Status:Published
Keywords:airborne lidar, Doppler, direct-detection, fringe-imaging, atmosphere, turbulence, gust, wake vortex,
Institution:Ludwigs-Maximilians-Universität München
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben LIDAR-Forschung und -Entwicklung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Volkert, Dr. Hans
Deposited On:28 Nov 2019 06:59
Last Modified:28 Nov 2019 06:59

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