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Acta Optica Sinica, Volume. 42, Issue 24, 2401002(2022)

Inversion Method for Low-Altitude Wind Profile Based on Floating Doppler Lidar

Bingyi Liu1,2、*, Qiang Wen1, Qichao Wang1, Kailin Zhang1, Songhua Wu1,2, and Junwu Tang3
Author Affiliations
  • 1Faculty of Information Science and Engineering, Ocean University of China, Qingdao 266100, Shandong , China
  • 2Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, Shandong , China
  • 3Engineering Department of Guanlan Satellite for Ocean Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, Shandong , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (20)
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    Figures & Tables(9)
    Floating wind lidar system

    Fig. 1. Floating wind lidar system

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    Schematic diagram of VAD sinusoidal fitting

    Fig. 2. Schematic diagram of VAD sinusoidal fitting

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    Flow chart of wind field retrieval by floating wind lidar

    Fig. 3. Flow chart of wind field retrieval by floating wind lidar

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    Horizontal wind speed and wind direction measured by floating wind lidar, offshore wind tower and fixed wind lidar on June 25, 2021. (a) Horizontal wind speed measured by floating wind lidar; (b) horizontal wind speed measured by offshore wind tower and fixed wind lidar; (c) difference of horizontal wind speed; (d) wind direction measured by floating wind lidar; (e) wind direction measured by offshore wind tower and fixed wind lidar; (f) difference of wind direction

    Fig. 4. Horizontal wind speed and wind direction measured by floating wind lidar, offshore wind tower and fixed wind lidar on June 25, 2021. (a) Horizontal wind speed measured by floating wind lidar; (b) horizontal wind speed measured by offshore wind tower and fixed wind lidar; (c) difference of horizontal wind speed; (d) wind direction measured by floating wind lidar; (e) wind direction measured by offshore wind tower and fixed wind lidar; (f) difference of wind direction

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    Averaged horizontal wind speed and wind direction measured from 00:10 to 00:20 on June 25, 2021. (a) Horizontal wind speed; (b) wind direction; (c) difference of horizontal wind speed; (d) difference of wind direction

    Fig. 5. Averaged horizontal wind speed and wind direction measured from 00:10 to 00:20 on June 25, 2021. (a) Horizontal wind speed; (b) wind direction; (c) difference of horizontal wind speed; (d) difference of wind direction

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    Scatter plots of 10 min-averaged wind speed and wind direction before and after quality control. (a) Wind speed before quality control; (b) wind speed after quality control; (c) wind direction before quality control; (d) wind direction after quality control

    Fig. 6. Scatter plots of 10 min-averaged wind speed and wind direction before and after quality control. (a) Wind speed before quality control; (b) wind speed after quality control; (c) wind direction before quality control; (d) wind direction after quality control

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    • Table 1. Criteria for quality acceptance of floating lidar wind measurement data

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      Table 1. Criteria for quality acceptance of floating lidar wind measurement data

      Statistical indicatorOptimal rangeAcceptable range

      Slope returned from linear regression of mean wind speed

      Wind speed determination coefficient

      Slope returned from linear regression of mean wind direction

      Wind direction determination coefficient

      Absolute value of wind direction deviation

      0.98-1.02

      >0.98

      0.97-1.03

      >0.97

      <5°

      0.97-1.03

      >0.97

      0.95-1.05

      >0.95

      <10°

    • Table 2. Key technical specifications of coherent Doppler lidar

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      Table 2. Key technical specifications of coherent Doppler lidar

      ParameterValue
      Laser wavelength /nm1550
      Pulse energy /μJ20
      Repetition rate /kHz10
      Height range of wind measurement /m10-300
      Measurement range of wind speed /（m·s-1）0-75
      Measurement range of wind direction /（°）0-360
      Uncertainty of wind speed measurement /（m·s-1）≤0.1
      Uncertainty of wind direction measurement /（°）≤3

    • Table 3. Key technical specifications of reference instruments

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      Table 3. Key technical specifications of reference instruments

      ParameterOffshore wind towerFixed wind lidar

      Height range of wind measurement /s

      Measurement range of wind speed /（m·s-1）

      Measurement range of wind direction /（°）

      Accuracy of wind speed measurement /（m·s-1）

      Accuracy of wind direction measurement /（°）

      30-100

      0.3-75.0

      0-360

      0.2

      1

      30-300

      0-75

      0-360

      0.1

      1

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    Bingyi Liu, Qiang Wen, Qichao Wang, Kailin Zhang, Songhua Wu, Junwu Tang. Inversion Method for Low-Altitude Wind Profile Based on Floating Doppler Lidar[J]. Acta Optica Sinica, 2022, 42(24): 2401002

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    Paper Information

    Category: Atmospheric Optics and Oceanic Optics

    Received: Apr. 27, 2022

    Accepted: May. 16, 2022

    Published Online: Dec. 14, 2022

    The Author Email: Liu Bingyi (liubingyi@ouc.edu.cn)

    DOI:10.3788/AOS202242.2401002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology