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介绍了全球大气风场观测的重要性,研制了一台基于三通道标准具的车载瑞利多普勒测风激光雷达,用于平流层的风场探测。较为详细地介绍了测风的基本原理、系统的总体结构以及技术参数。利用紫外光在大气分子中的低吸收和高散射特点选取355 nm作为工作波长。描述了三通道标准具的结构以及利用脉冲光对标准具的透过率曲线进行了扫描,结果表明,标准具实测参数与设计参数基本一致,信号通道1和信号通道2峰值透过率分别为68.6%和67.5%。两个边缘通道的间隔为4.6 GHz。利用调试好的系统对合肥地区平流层进行了初步的风场探测,测试结果表明,该激光雷达系统稳定性达到设计指标。
The importance of global atmospheric wind field observations was introduced. A three-channel car-based Rayleigh-Doppler wind-lidar based on three-channel etalon was developed for detecting the wind field in the stratosphere. The basic principles of wind measurement, the overall structure of the system and the technical parameters are introduced in detail. Utilizing the characteristics of low absorption and high scattering of ultraviolet light in atmospheric molecules, we choose 355 nm as the working wavelength. The structure of the three-channel etalon and the transmittance curve of the etalon with pulsed light are described. The results show that the measured parameters of the etalon are basically the same as the design parameters, the peak transmittances of signal channel 1 and signal channel 2 are 68.6% and 67.5%. The spacing between the two edge channels is 4.6 GHz. The preliminary wind field exploration in the stratosphere in Hefei area was carried out by using the debugged system. The test results show that the stability of the Lidar system reaches the design index.