Accuracy analysis of wind profile deteceted by incoherent Doppler lidar

Abstract

Abstract: Doppler lidar has the characteristics of high precision and high spatial-temporal resolution in the detection of clear-air atmospheric wind field. The on-board incoherent Doppler lidar from CMA meteorological center is based on hyperspectral technique, which can detect atmospheric wind profile, horizontal and fan-shaped wind field. From March to April, 2011, Synchronous contrast observation is carried out with the lidar and L-band radiosonde at the southern suburb observation station of Beijing. Fifty sets of comparable wind profile data with an average effective detection height of 6038 m are obtained. In the case of better visibility, the effective detection range is up to 10 km. A total of 30240 pairs of wind speed and wind direction contrast statistical points are obtained, and the correlation coefficient of wind speed is 0.82. The system difference and standard deviation are 0.586 m, 5.38 m/s, respectively. The correlation coefficient of wind direction is 0.94, the system difference is 5.93°and difference between the labels is 37.98°, the consistency between them is better. According to the layer of 1000 m, the wind speed and wind direction correlation coefficient, system difference and standard deviation of each layer are displayed below 5 km. Results show that the consistency of the laser radar detection wind profile and that of L band sounding radar during 1000～2000 m is the best, and the causes are analyzed. For incoherent Doppler lidar, the detection data accuracy is affected by both the signal-to-noise ratio of the echo signal and rapid change at low-level aerosol.

Key words: Doppler lidar, wind profile, sounding radar, contrast

Shao Nan1，Chen Yubao1，2*， Bu Zhichao1，Han Xu1，Liu Bingyi3，Gao Yuchun1. Accuracy analysis of wind profile deteceted by incoherent Doppler lidar[J]. Chinese Journal of Quantum Electronics.

References

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