Wind measurement techniques of coherent wind lidar

An all-fiber coherent Doppler lidar was developed, and had been applied to XXX project as a test prototype. Concept of this lidar, which could detect long-distance wind speed, was using eye-safety wavelength, compact-designed and reliable performance. By wind retrieval algorithm based on VAD, the velocity precision of coherent wind lidar was analyzed firstly. To evaluate its performances, this lidar was compared with an ultrasonic wind direction located at the top of the tower(103 m height) and a air exploration balloon. The lidar and ultrasonic wind direction measured wind field distribution simultaneously. Measured data were compared and analyzed, which include velocity data and wind direction data. Data correlation of measured velocity was about 95%, and standard deviation was about 0.8 m/s. Data correlation of measured wind direction was about 98.6%, and standard deviation was about 5. The results can correspond to the abroad level, which means the lidar has excellent performance and will be one of the widely-used sensors for wind detection instruments in the near future.