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Experiments on spontaneous Rayleigh-Brillouin scattering in air

Witschas, Benjamin (2011) Experiments on spontaneous Rayleigh-Brillouin scattering in air. Dissertation, Friedrich-Schiller-Universität Jena.

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Abstract

Atmospheric lidar techniques for the measurement of wind, temperature, and optical properties of aerosols as well as non-intrusive measurement techniques for temperature, density and bulk velocity in gas flow rely on the exact knowledge of the spectral line shape of the scattered laser light on molecules. The best model currently available to describe these line shapes is the Tenti S6 model which, however, has not yet been validated in air. In this thesis, high-precision spontaneous Rayleigh-Brillouin (SRB) scattering experiments on N2 as well as on dry and humid air are presented and used to prove the accuracy of the Tenti S6 line shape model and to investigate the influence of water vapour on the SRB line shape. The measurements were performed in controlled laboratory experiments as well as in the atmosphere. In contrast to earlier SRB scattering experiments in the visible spectral region, the measurements were carried out with ultraviolet light, which is used by the lidars on the satellite missions ADM-Aeolus and EarthCARE.

Document Type:Thesis (Dissertation)
Title:Experiments on spontaneous Rayleigh-Brillouin scattering in air
Authors:
AuthorsInstitution or Email of Authors
Witschas, BenjaminBenjamin.Witschas@dlr.de
Date:25 October 2011
Number of Pages:112
Status:Published
Keywords:Rayleigh-Brillouin scattering, Tenti S6 model, ADM-Aeolus, light scattering in air
Institution:Friedrich-Schiller-Universität Jena
Department:Physikalisch-Astronomische Fakultät
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 Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr. Benjamin Witschas
Deposited On:11 Nov 2011 13:41
Last Modified:10 Jan 2012 11:57

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