A Rotary Platform Mounted Doppler Lidar for Wind Measurements in Upper Troposphere and Stratosphere

A Doppler lidar mounted on a rotary platform has been developed for measuring wind fields in the upper troposphere and stratosphere. The rotating platform was used to support a large system for the detection of wind velocities of sight (VOS) in four directions. The principle, structure, and paramete...

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Bibliographic Details
Published inRemote sensing (Basel, Switzerland) Vol. 14; no. 21; p. 5556
Main Authors Zhao, Ming, Xie, Chenbo, Wang, Bangxin, Xing, Kunming, Chen, Jianfeng, Fang, Zhiyuan, Li, Lu, Cheng, Liangliang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2022
Subjects
Aperture
Design optimization
Deviation
Doppler effect
Doppler lidar
Fabry-Perot interferometer
Fabry-Perot interferometers
Frequency stability
Iodine
Lasers
Lidar
Mie scattering
radiosonde
Radiosondes
Remote sensing
Spectrum allocation
Stratosphere
stratospheric wind
Telescopes
Troposphere
Velocity
Wind
Wind direction
Wind measurement
Wind speed
China
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Summary:A Doppler lidar mounted on a rotary platform has been developed for measuring wind fields in the upper troposphere and stratosphere. The rotating platform was used to support a large system for the detection of wind velocities of sight (VOS) in four directions. The principle, structure, and parameters of the lidar system are introduced. The Fabry-Perot interferometer (FPI), the core component of the wind measurement system, was designed after comprehensively considering the measurement uncertainty and the influence of Mie scattering. Its dual-edge channel bandwidth is 1.05 GHz with 3.48 GHz spacing. In operation, the FPI channels are locked to the laser frequency with a stability of 14.8 MHz. Compared with the local radiosonde, it was found that the deviation in wind speed below 28 km was generally less than 10 m/s, and the deviation in wind direction below 19 km was less than 10 degrees. The 42-day profile comparison between lidar in Hefei and radiosondes in Anqing and Fuyang was analyzed. The statistical results show that the wind speed and wind direction deviations between lidar and radiosondes below 20 km were approximately 10 m/s and 20 degrees, respectively, which are comparable to the regional differences in the wind field. However, as altitudes exceed 20 km, the deviations increased rapidly with height. The experiments indicate that the Doppler lidar could measure wind fields from 7 km to 30 km, with better detection accuracy below 20 km.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs14215556