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  • Featured in Physics
  • Letter

Sub-meter wind detection with pulsed coherent Doppler lidar

Yunpeng Zhang1, Jinlong Yuan2, Yunbin Wu1, Jingjing Dong2, and Haiyun Xia1,2,3,4,*

  • 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
  • 2School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 3Hefei National Laboratory for Physical Sciences at the Microscale, USTC, Hefei 230026, China
  • 4Institute of Software, Chinese Academy of Sciences, Beijing 100190, China

  • *hsia@ustc.edu.cn
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Phys. Rev. Fluids 8, L022701 – Published 27 February, 2023

DOI: https://doi.org/10.1103/PhysRevFluids.8.L022701

Abstract

High-resolution wind detection plays a crucial role in aviation safety and aerodynamic research. A pulsed coherent Doppler wind lidar (CDWL) with sub-meter/sub-second resolution is demonstrated. The pseudorandom modulation (PRM) method is used to break the link between laser pulse duration and spatial resolution. Benefiting from the flexible pulse duration, the detection accuracy degradation related to the short pulse is largely mitigated. The backscattered spectra and wind profiles measured by the proposed lidar are compared with those obtained by a conventional pulsed CDWL, validating its capacity of radial wind detection within 700 m at 0.9 m/0.5 s resolution. With the help of the proposed high-resolution lidar, the meter-scale perturbation on the wind field from an electric fan is detected in a field experiment.

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synopsis

High-Resolution Wind Detection

Published 3 March, 2023

A phase-modulated lidar system can measure the speed of distant winds at submeter scales, potentially allowing detailed maps of turbulent flows.

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Phys. Rev. Fluids 8, L022701– Published 27 February, 2023
  • Received 20 September 2022
  • Accepted 16 February 2023
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