Zero Doppler correction for Fabry–Pérot interferometer-based direct-detection Doppler wind LIDAR

By the end of 2017, the European Space Agency (ESA) will launch the Atmospheric laser Doppler instrument (ALADIN), a direct detection Doppler wind lidar operating at 355 nm. An important tool for the validation and optimization of ALADIN’s hardware and data processors for wind retrievals with real atmospheric signals is the ALADIN airborne demonstrator A2D. In order to be able to validate and test aerosol retrieval algorithms from ALADIN, an algorithm for the retrieval of atmospheric backscatter and extinction profiles from A2D is necessary. The A2D is utilizing a direct detection scheme by using a dual Fabry-Pérot interferometer to measure molecular Rayleigh signals and a Fizeau interferometer to measure aerosol Mie returns. Signals are captured by accumulation charge coupled devices (ACCD). These specifications make different steps in the signal preprocessing necessary. In this paper, the required steps to retrieve aerosol optical products, i. e. particle backscatter coefficient βp, particle extinction coefficient αp and lidar ratio Sp from A2D raw signals are described.

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First Results from the German Cal/Val Activities for Aeolus

EPJ Web of Conferences ◽

10.1051/epjconf/202023701008 ◽

2020 ◽

Vol 237 ◽

pp. 01008 ◽

Cited By ~ 1

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.

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

2014 19th IEEE-NPSS Real Time Conference ◽

10.1109/rtc.2014.7097502 ◽

2014 ◽

Author(s):

Yuan Yao ◽

Xin Gao ◽

Ziru Sang ◽

Kun Hu ◽

Futian Liang ◽

...

Keyword(s):

Direct Detection ◽

Frequency Locking ◽

Wind Lidar ◽

Doppler Wind Lidar

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

10.1117/12.2034298 ◽

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

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

EPJ Web of Conferences ◽

10.1051/epjconf/202023706006 ◽

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.

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