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Rayleigh-Brillouin scattering of laser light in air

Witschas, Benjamin and Reitebuch , Oliver and Lemmerz, Christian and Vieitez, Ofelia and Ubachs, Wim and van der Water, Willem (2012) Rayleigh-Brillouin scattering of laser light in air. DPG Frühjahrstagung, 26.-30. Mar. 2012, Berlin, Germany.

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Abstract

The global observation of atmospheric wind profiles remains to be the highest priority need for weather forecast. Therefore, the European Space Agency ESA decided to implement the Atmospheric Dynamics Mission ADM-Aeolus to demonstrate the potential of the Doppler lidar technology for global wind profiling. Thereby, the laser of the Doppler lidar sends short pulses into the atmosphere where they are partly scattered by aerosols and molecules. The backscattered light is collected by a telescope and analyzed concerning its frequency. The frequency shift between emitted and received light, caused by the Doppler-effect, is directly proportional to the atmospheric wind speed. The accuracy of this measurement technique is significantly depending on the knowledge of the spectral distribution of the backscattered light. For the validation and the improvement of spectral line shape models of Rayleigh-Brillouin scattered light, laboratory measurements as well as atmospheric measurements were performed. In my talk, the results of these measurements and the resulting influence on remote sensing techniques are extensively discussed.

Document Type:Conference or Workshop Item (UNSPECIFIED)
Title:Rayleigh-Brillouin scattering of laser light in air
Authors:
AuthorsInstitution or Email of Authors
Witschas, BenjaminBenjamin.Witschas@dlr.de
Reitebuch , OliverOliver.Reitebuch@dlr.de
Lemmerz, ChristianChristian.Lemmerz@dlr.de
Vieitez, Ofeliavieitez@knmi.nl
Ubachs, Wimwimu@nat.vu.nl
van der Water, WillemW.v.d.Water@tue.nl
Date:29 March 2012
Keywords:Rayleigh scattering, Brillouin scattering, Rayleigh-Brillouin scattering, Lidar, ADM-Aeolus
Event Title:DPG Frühjahrstagung
Event Location:Berlin, Germany
Event Type:national Conference
Event Dates:26.-30. Mar. 2012
Organizer:Deutsche Physikalische Gesellschaft
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 - Projekt ADM
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr. Benjamin Witschas
Deposited On:05 Dec 2012 12:33
Last Modified:05 Dec 2012 12:33

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