Results of the pre-development of ALADIN, the direct detection Doppler wind lidar for ADM/Aeolus

2004 ◽  
Author(s):  
Yannig Durand ◽  
Roland Meynart ◽  
Alain J. Culoma ◽  
Didier Morancais ◽  
Frederic Fabre
Keyword(s):  
Direct Detection ◽  
Wind Lidar ◽  
Doppler Wind Lidar

Frequency stabilization method in direct detection Doppler wind lidar under field experiment conditions

2016 ◽  
Vol 45 (9) ◽  
pp. 0906004
Author(s):  
王国成 Wang Guocheng ◽  
张飞飞 Zhang Feifei ◽  
钱正祥 Qian Zhengxiang ◽  
杜 跃 Du Yue ◽  
舒志峰 Shu Zhifeng ◽  
...  
Keyword(s):  
Field Experiment ◽  
Direct Detection ◽  
Frequency Stabilization ◽  
Stabilization Method ◽  
Wind Lidar ◽  
Doppler Wind Lidar

scholarly journals First Results from the German Cal/Val Activities for Aeolus

2020 ◽  
Vol 237 ◽  
pp. 01008 ◽  
Author(s):  
Holger Baars ◽  
Alexander Geiß ◽  
Ulla Wandinger ◽  
Alina Herzog ◽  
Ronny Engelmann ◽  
...  
Keyword(s):  
Direct Detection ◽  
Weather Prediction ◽  
European Space Agency ◽  
High Spectral Resolution ◽  
Dual Channel ◽  
Space Agency ◽  
First Results ◽  
Global Coverage ◽  
Wind Lidar ◽  
Doppler Wind Lidar

On 22nd August 2018, the European Space Agency (ESA) launched the first direct detection Doppler wind lidar into space. Operating at 355 nm and acquiring signals with a dual channel receiver, it allows wind observations in clear air and particle-laden regions of the atmosphere. Furthermore, particle optical properties can be obtained using the High Spectral Resolution Technique Lidar (HSRL) technique. Measuring with 87 km horizontal and 0.25-2 km vertical resolution between ground and up to 30 km in the stratosphere, the global coverage of Aeolus observations shall fill gaps in the global observing system and thus help improving numerical weather prediction. Within this contribution, first results from the German initiative for experimental Aeolus validation are presented and discussed. Ground-based wind and aerosol measurements from tropospheric radar wind profilers, Doppler wind lidars, radiosondes, aerosol lidars and cloud radars are utilized for that purpose.

A method of frequency-locking in Direct Detection Doppler Wind LIDAR

2014 ◽  
Author(s):  
Yuan Yao ◽  
Xin Gao ◽  
Ziru Sang ◽  
Kun Hu ◽  
Futian Liang ◽  
...  
Keyword(s):  
Direct Detection ◽  
Frequency Locking ◽  
Wind Lidar ◽  
Doppler Wind Lidar

Design on the readout electronics for the mobile direct detection Doppler wind LIDAR

2013 ◽  
Author(s):  
Xin Gao ◽  
Fei Wen ◽  
Yuan Yao ◽  
Zi-ru Sang ◽  
Ge Jin
Keyword(s):  
Direct Detection ◽  
Readout Electronics ◽  
Wind Lidar ◽  
Doppler Wind Lidar

scholarly journals Development of Direct-Detection Doppler Wind Lidar for Vertical Atmospheric Motion

2020 ◽  
Vol 237 ◽  
pp. 06006
Author(s):  
Shoken Ishii ◽  
Makoto Aoki ◽  
Kanna Tominaga ◽  
Tomoaki Nishizawa ◽  
Yoshitaka Jin ◽  
...  
Keyword(s):  
Wind Profile ◽  
Direct Detection ◽  
Weather Prediction ◽  
Information And Communications Technology ◽  
Good Precision ◽  
Remote Sensing Technique ◽  
High Vertical Resolution ◽  
Wind Lidar ◽  
Atmospheric Phenomena ◽  
Doppler Wind Lidar

Wind is fundamental in many atmospheric phenomena. Global wind profile observation is important to improve numerical weather prediction (NWP) and various meteorological studies. Wind profile observations are measured mainly by radiosonde networks. A Doppler Wind Lidar (DWL) is a useful remote sensing technique for wind measurement. DWL would provide us with a wind profile having high vertical resolution, low bias, and good precision. The National Institute of Information and Communications Technology (NICT) studies DWL has been developing various DWL. In the paper, we report development of a 355-nm direct-detection DWL and describe recent results of a 2-µm coherent DWL at NICT.

scholarly journals Development of Synergetic-Active Sensor-System for Evaluation of Observations by Earthcare

2020 ◽  
Vol 237 ◽  
pp. 07011
Author(s):  
Hajime Okamoto ◽  
Kaori Sato ◽  
Masahiro Fujikawa ◽  
Eiji Oikawa ◽  
Tomoaki Nishizawa ◽  
...  
Keyword(s):  
Direct Detection ◽  
Cloud Microphysics ◽  
Sensor System ◽  
High Spectral Resolution ◽  
Horizontal Wind ◽  
Observation System ◽  
Active Sensor ◽  
Wind Lidar ◽  
Multiple Field ◽  
Doppler Wind Lidar

We develop the synergetic ground-based active-sensor-system for the evaluation of observations by space-borne lidars. The system consists of second version of multi-field-view multiple-scattering polarization lidar (MFMSPL-2), multiple-field-of-view high spectral resolution polarization lidar, direct-detection Doppler wind lidar, coherent Doppler wind lidar and 94GHz cloud profiling radar. The system can simulate observed signals from sensors onboard the joint Japanese/European mission Earth Clouds, Aerosols and Radiation Explorer (EarthCARE). The observation system can provide unique opportunity to study interaction of cloud microphysics, aerosol microphysics, vertical air motion and vertical distribution of horizontal wind and it will lead to evaluate cloud-convective parameterization and to reduce uncertainties in climate change predictions.

scholarly journals The Airborne Demonstrator for the Direct-Detection Doppler Wind Lidar ALADIN on ADM-Aeolus. Part II: Simulations and Rayleigh Receiver Radiometric Performance

2009 ◽  
Vol 26 (12) ◽  
pp. 2516-2530 ◽  
Author(s):  
Ulrike Paffrath ◽  
Christian Lemmerz ◽  
Oliver Reitebuch ◽  
Benjamin Witschas ◽  
Ines Nikolaus ◽  
...  
Keyword(s):  
Direct Detection ◽  
European Space Agency ◽  
Satellite System ◽  
Satellite Mission ◽  
Backscatter Signal ◽  
Space Agency ◽  
Expected Performance ◽  
Wind Lidar ◽  
Doppler Wind Lidar ◽  
Signal Intensities

Abstract In the frame of the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) satellite mission by the European Space Agency (ESA), a prototype of a direct-detection Doppler wind lidar was developed to measure wind from ground and aircraft at 355 nm. Wind is measured from aerosol backscatter signal with a Fizeau interferometer and from molecular backscatter signal with a Fabry–Perot interferometer. The aim of this study is to validate the satellite instrument before launch, improve the retrieval algorithms, and consolidate the expected performance. The detected backscatter signal intensities determine the instrument wind measurement performance among other factors, such as accuracy of the calibration and stability of the optical alignment. Results of measurements and simulations for a ground-based instrument are compared, analyzed, and discussed. The simulated atmospheric aerosol models were validated by use of an additional backscatter lidar. The measured Rayleigh backscatter signals of the wind lidar prototype up to an altitude of 17 km are compared to simulations and show a good agreement by a factor better than 2, including the analyses of different error sources. First analyses of the signal at the Mie receiver from high cirrus clouds are presented. In addition, the simulations of the Rayleigh signal intensities of the Atmospheric Laser Doppler Instrument (ALADIN) Airborne Demonstrator (A2D) instrument on ground and aircraft were compared to simulations of the satellite system. The satellite signal intensities above 11.5 km are larger than those from the A2D ground-based instrument and always smaller than those from the aircraft for all altitudes.

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