Research on dual-doppler scanning Lidar wind measurements replacing the meteorological mast

Doppler wind lidar has gradually replaced traditional meteorological masts with its advantages of high precision and long-range detection, becoming the main method of wind field measurement. In this paper, the observation research was conducted in Zhangbei test site to test the dual-lidar virtual mast method through the combination of two wind lidars for synchronous scanning. On the basis of achieving pointing calibration and time synchronization, the dual-lidar system is used to measure the horizontal wind speed and wind direction at a height of 136 m of the mast. An environmental sensitivity error analysis is also carried out for 1-second wind speed data. The results show that the highly-synchronous dual-lidar system has the ability of replacing the met mast. By comparing with the wind speed of the 136 m cup anemometer in the mast, the mean deviation between the 10-minute and 1-second wind speeds of the dual-lidar system is within -0.04m/s, and the goodness of fit exceeds 0.98. In terms of error, turbulence intensity, wind veer, and flow inclination angle are significant environmental factors that cause second level wind speed errors, resulting in a total uncertainty of 1.9%.