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Published on: February 13, 2018
Fabry-Perot interferometer based Mie Doppler lidar for low tropospheric wind observation
Haiyun Xia1, Dongsong Sun, Yuanhong Yang
1Institute of Opto-electronics Technology, Beihang University, Beijing 100083, China. haiyunxia@126.com
Applied Optics
|October 13, 2007
Summary
This study enhanced a Doppler wind lidar system for reliable atmospheric measurements. The improved system offers stable, robust wind and aerosol profiling in the lower troposphere.
Area of Science:
- Atmospheric Science
- Optical Remote Sensing
- Laser Technology
Background:
- Development of Doppler wind lidar systems for atmospheric research.
- Previous implementations of lidar at 355 nm and initial 1064 nm system.
- Need for enhanced robustness in lidar systems for long-term operation.
Purpose of the Study:
- Improve the robustness and stability of an incoherent-detection Mie Doppler wind lidar operating at 1064 nm.
- Enhance performance for long-period wind measurements in the low troposphere.
- Validate system performance through comparison with established meteorological instruments.
Main Methods:
- Upgraded the 1064 nm lidar system with a multimode fiber for reference signal reception.
- Incorporated a mode scrambler for uniform Fabry-Perot interferometer illumination.
- Implemented a fast scannable Fabry-Perot interferometer for calibration and laser frequency determination.
Main Results:
- Achieved high stability with a standard deviation of peak transmission at 0.49% and FWHM at 0.36%.
- Validated lidar wind measurements within a dynamic range of +/-40 m/s.
- Demonstrated good agreement with wind profiler radar and Vaisala wiresonde, within expected error margins.
Conclusions:
- The upgraded 1064 nm Doppler wind lidar system exhibits enhanced stability and robustness for continuous atmospheric monitoring.
- The system is capable of providing high-resolution (1 min, 30 m) wind field and aerosol backscatter coefficient data.
- The validated performance confirms the lidar's suitability for long-term, reliable wind measurements in the boundary layer.
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