Journal ArticleDOI
The Airborne Demonstrator for the Direct-Detection Doppler Wind Lidar ALADIN on ADM-Aeolus. Part I: Instrument Design and Comparison to Satellite Instrument
Oliver Reitebuch,Christian Lemmerz,Engelbert Nagel,Ulrike Paffrath,Yannig Durand,Martin Endemann,Frederic Fabre,Marc Chaloupy +7 more
TLDR
In this article, the European Space Agency (ESA) decided to implement a Doppler wind lidar mission called the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) to demonstrate the potential of the doppler lidar technology and the expected impact on numerical weather forecasting.Abstract:
The global observation of profiles of the atmospheric wind speed is the highest-priority unmet need for global numerical weather prediction. Satellite Doppler lidar is the most promising candidate to meet the requirements on global wind profile observations with high vertical resolution, precision, and accuracy. The European Space Agency (ESA) decided to implement a Doppler wind lidar mission called the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) to demonstrate the potential of the Doppler lidar technology and the expected impact on numerical weather forecasting. An airborne prototype of the instrument on ADM-Aeolus was developed to validate the instrument concept and retrieval algorithms with realistic atmospheric observations before the satellite launch. It is the first airborne direct-detection Doppler lidar for atmospheric observations, and it is operating at an ultraviolet wavelength of 355 nm. The optical design is described in detail, including the single-frequency pulsed laser and th...read more
Citations
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Journal ArticleDOI
Validation of the Aeolus L2B wind product with airborne wind lidar measurements in the polar North Atlantic region and in the tropics
Benjamin Witschas,Christian Lemmerz,Alexander Geiß,Oliver Lux,Uwe Marksteiner,Stephan Rahm,Oliver Reitebuch,Andreas Schäfler,Fabian Weiler +8 more
TL;DR: In this article , the results of the first three years of the European Space Agency's Aeolus mission are presented, where the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars (DWL) on board the DLR Falcon aircraft, aiming to validate the quality of the recent Aeolis Level 2B (L2B) wind data product.
Journal ArticleDOI
Aeolus End-to-End Simulator and Wind Retrieval Algorithms up to Level 1B
Oliver Reitebuch,Uwe Marksteiner,Marc Rompel,Markus Meringer,Karsten Schmidt,Dorit Huber,Ines Nikolaus,Alain Dabas,Jonathan Marshall,Frank de Bruin,Thomas Kanitz,Anne-Grete Straume +11 more
TL;DR: The first wind lidar in space ALADIN will be deployed on ESA´s Aeolus mission as mentioned in this paper, where an end-to-end simulator was developed to assess the performance and optimize the wind retrieval and calibration algorithms.
Journal ArticleDOI
Molecular simulation of Rayleigh-Brillouin scattering in binary gas mixtures and extraction of the rotational relaxation numbers
TL;DR: In this paper, the rotational relaxation of binary gas mixtures was analyzed using direct simulation Monte Carlo (DSMC) and molecular dynamics (MD) simulations. But the rotation relaxation of the binary mixtures of argon and helium was not analyzed.
Journal ArticleDOI
Gravity waves observation of wind field in stratosphere based on a Rayleigh Doppler lidar.
Ruocan Zhao,Xiankang Dou,Dongsong Sun,Xianghui Xue,Jun Zheng,Yuli Han,Tingdi Chen,Guocheng Wang,Zhou Yingjie +8 more
TL;DR: The observed cases demonstrate the Rayleigh Doppler Lidar's capacity to study gravity waves and make it possible to identify gravity wave cases from the relationships between different variables: temperature and horizontal wind.
Journal ArticleDOI
The Optical Autocovariance Wind Lidar. Part II: Green OAWL (GrOAWL) Airborne Performance and Validation
TL;DR: A two-look airborne Doppler wind lidar operating at the 532-nm laser wavelength, the Green Optical Autocovariance Wind Lidar (GrOAWL), was built and flown aboard the NASA WB-57 research airframe as discussed by the authors.
References
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Journal ArticleDOI
On the Kinetic Model Description of Rayleigh–Brillouin Scattering from Molecular Gases
TL;DR: In this article, the behavior of a model kinetic equation used for describing the density fluctuation spectrum in molecular gases was analyzed in detail in the kinetic regime, in the case of molecular gases.
Journal ArticleDOI
The atmospheric dynamics mission for global wind field measurement
Ad Stoffelen,Jean Pailleux,Erland Källén,J. Michael Vaughan,Lars Isaksen,Pierre H. Flamant,Werner Wergen,Erik Andersson,Harald Schyberg,Alain Culoma,Roland Meynart,Martin Endemann,Paul Ingmann +12 more
TL;DR: The Atmospheric Dynamics Mission (ADM) as discussed by the authors demonstrated measurements of vertical wind profiles from space using a high-performance Doppler wind lidar based on direct-detection interferometric techniques.
Journal ArticleDOI
A Doppler lidar for measuring winds in the middle atmosphere
TL;DR: In this paper, a Doppler Lidar is used to measure the wave-mean flow interaction in the middle atmosphere using Rayleigh scattering from air molecules, which is designed to cover the height range 25-60 km, where radars cannot operate.
Journal ArticleDOI
The airborne multi-wavelength water vapor differential absorption lidar WALES: system design and performance
TL;DR: In this article, a high-performance airborne water vapor differential absorption lidar has been developed during the past years, which uses a four-wavelength/three-absorption line measurement scheme in the 935 nm H2O absorption band to cover the whole troposphere and lower stratosphere simultaneously.
Journal ArticleDOI
Edge technique: theory and application to the lidar measurement of atmospheric wind.
TL;DR: The frequency shift measurement insensitive to both laser and filter frequency jitter and drift is shown to be insensitive to the laser width and shape for widths that are less than the half-width of the edge filter.
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