| In light of the challenges posed by the numerous parameters requiring calibration, the involvement of multiple metrology specialties, and the inadequacies in existing calibration methods for coherent Doppler wind lidar, this paper provides a comprehensive examination of calibration techniques for various parameters associated with coherent Doppler wind lidar. Considering the characteristics of laser wind measurement, such as non-contact, high spatiotemporal resolution and large detection range, the method system of "feature analysis and multi-method integration" is adopted to break through the difficulties of quantitative evaluation of controversial parameters such as wind speed, wind direction, maximum measurement distance and detection blind zone. Focusing on the wind speed parameters, cross verification of three methods of calibration turntable, RF signal analog Doppler shift and standard anemometer wind speed calibration was carried out to clarify the advantages and disadvantages and applicable conditions of each method, and improve the data reliability of wind speed parameter calibration. Aiming at the difficult problem of wind direction calibration, the calibration method under different scanning modes is presented dialectically to improve its universality. The calibration results of wind speed and wind direction were verified, and the uncertainty analysis of wind speed and wind direction parameters was carried out, which effectively explained the feasibility of the calibration method, filled the technical gap of the measurement system of laser wind measurement equipment, and provided standardized technical support for the accurate detection of wind fields in meteorological observation, aviation safety, new energy and other fields. It plays a positive role in promoting the development of atmospheric remote sensing metrology technology. |
