Journal of Atmospheric and Environmental Optics, Volume. 19, Issue 1, 22(2024)
A coherent wind lidar based on Doppler principle and its field application
Figures & Tables(20)
Fig. 1. Schematic diagram of coherent wind lidar measurement principle
Fig. 2. Schematic diagram of VAD method for retrieving wind speed in atmospheric wind field
Fig. 4. The physical picture of coherent wind lidar. (a) Experimental set; (b) appearance
Fig. 5. Scene picture of coherent wind lidar system in Huangpu District, Guangzhou City
Fig. 6. Probability density distribution diagram of horizontal wind speed of coherent wind lidar at different heights.(a) 510 m; (b) 1070 m; (c) 1490 m; (d) 2050 m
Fig. 7. Probability density distribution diagram of horizontal wind speed of wind profiler radar at different heights.(a) 510 m; (b) 1070 m; (c) 1490 m; (d) 2050 m
Fig. 8. Wind direction rose diagram of coherent wind lidar at different heights. (a) 510 m; (b) 1070 m; (c) 1490 m; (d) 2050 m
Fig. 9. Wind direction rose diagram of wind profiler radar at different heights. (a) 510 m; (b) 1070 m; (c) 1490 m; (d) 2050 m
Fig. 10. Comparisons of horizontal wind speed profiles (a) and wind direction profiles (b) between wind profile radar and coherent wind lidar at 22:48 on October 16, 2021
Fig. 11. Difference of horizontal wind speeds (a) and wind directions (b) and relative error of wind speed (c) between wind profiler radar and coherent wind lidar at 22:48 on October 16, 2021
Fig. 12. Time series plot of horizontal wind speed and wind direction from 10:00 on October 18, 2021 to 00:00 on October 19, 2021
Fig. 13. Time series plot of vertical wind speed and wind direction from 10:00 on October 18, 2021 to 00:00 on October 19, 2021
Fig. 14. Time series plot of temperature and relative humidity at the near surface from 10:00 on October 18, 2021 to 00:00 on October 20, 2021
Fig. 15. Time series plot of horizontal wind speed and wind direction from 00:00 on October 19, 2021 to 00:00 on October 20, 2021
Fig. 16. Time series plot of vertical wind speed and wind direction from 00:00 on October 19, 2021 to 00:00 on October 20, 2021
Table 1. Design parameters of coherent wind lidar
View tableView in ArticleTable 1. Design parameters of coherent wind lidar
Technical parameter Value Wavelength/nm 1550 Measuring range of height/m 45-3000 Measuring range of wind speed/(m·s-1) 0-60 Measuring range of wind direction/(°) 0-360 Repetition frequency/MHz 400 Horizontal wind direction error/(°) ≤ 10 Horizontal wind speed error/(m·s-1) ≤ 0.8 (V ≤ 10 m·s-1) Vertical flow error/(m·s-1) ≤ 0.5 Detection blind spot/m ≤ 45 Spatial resolution/m 30/60/90 Operating temperature/°C -10-50 Weight/kg ≤ 30
Table 2. Comparison of horizontal wind direction and wind direction at different heights between coherent wind lidar and wind profiler radar from October 16 to 20，2021 at station in Huangpu District
View tableView in ArticleTable 2. Comparison of horizontal wind direction and wind direction at different heights between coherent wind lidar and wind profiler radar from October 16 to 20，2021 at station in Huangpu District
Height/m Number of sample Pearson correlation coefficient Wind direction coincidence rate/% 510 175 0.686* 41.5 650 173 0.837* 31.4 790 176 0.850* 32.5 930 177 0.902* 33.7 1070 177 0.910* 38.2 1210 173 0.829* 30.3 1350 168 0.687* 32.5 1490 165 0.675* 29.2 1630 161 0.620* 25.8 1770 158 0.547* 20.2 1910 153 0.521* 21.3 2050 150 0.482* 17.9 2190 140 0.348* 13.4
Table 3. Comparisons of horizontal wind speed profiles and wind direction profiles between wind profiler radar and coherent wind lidar at 22:48 on October 16，2021
View tableView in ArticleTable 3. Comparisons of horizontal wind speed profiles and wind direction profiles between wind profiler radar and coherent wind lidar at 22:48 on October 16，2021
Parameter Height/m Pearson correlation coefficient Mean absolute
difference
Relative error/% Standard error Wind speed 510-2350 0.901 0.814 m·s-1 7.39 1.060 m·s-1 Wind direction 0.918 (> 800 m) 23.81° ― ―
Table 4. Non-parametric test results of horizontal wind speed profiles and wind direction profiles between wind profile radar and coherent wind lidar at 22:48 on October 16，2021
View tableView in ArticleTable 4. Non-parametric test results of horizontal wind speed profiles and wind direction profiles between wind profile radar and coherent wind lidar at 22:48 on October 16，2021
Parameter Instrument type Number of samples Mean value Standard
deviation
Maximal value Minimal value Wilcoxon test factor P Wind speed Wind profiler radar 52 9.528 3.020 14.548 6.020 0.299 Coherent wind lidar 52 9.720 3.495 16.579 5.902 Wind direction Wind profiler radar 52 62.320 23.129 90.378 14.100 0.190 Coherent wind lidar 52 100.817 117.200 358.968 1.638
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Taofeng GU, Haiyan YUE, Sihua WANG, Guangsheng WU, Houwen FENG, Ziheng TANG, Peng ZHUANG, Baorong KANG, Chenbo XIE. A coherent wind lidar based on Doppler principle and its field application[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(1): 22
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Received: May. 13, 2022
Accepted: --
Published Online: Mar. 19, 2024
The Author Email: Haiyan YUE (260894529@qq.com)
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