Wind measurements with incoherent Doppler lidar based on iodine filters at night and day
Wind measurements with incoherent Doppler lidar based on iodine filters at night and day
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DOI：
10.1007/s00340-007-2674-y
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
Z. Liu;B. Liu;Z. G. Li;Z. Yan;S. H. Wu;Z. Sun
中科院分区：
文献类型：
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作者：
Z. Liu;B. Liu;Z. G. Li;Z. Yan;S. H. Wu;Z. Sun
介绍了由中国海洋大学海洋遥感教育部重点实验室研制的一种基于碘滤光片的532 nm非相干多普勒风激光雷达，用于昼夜风的测量。该系统使用光纤和窄带干扰滤光片来抑制日光。利用光子计数器提高了探测距离。两个碘滤光片分别用于锁定发射激光频率和鉴别多普勒频移。描述了风廓线的检索方法。风廓线的探测范围（垂直分辨率为136米）夜间为100米至15公里，白天为12公里。探测范围覆盖中高纬度地区对流层。激光雷达与探空仪的对比实验分别在夜间和白天进行。夜间风向和风速标准差分别为15.5°和3.1 m/s，白天风向和风速标准差分别为15.7°和3.2 m/s。该系统还具有测量气溶胶后向散射比的能力。
An incoherent Doppler wind lidar based on the iodine filter at 532 nm is presented for day and night wind measurements, which was developed by the Key Laboratory of Ocean Remote Sensing of Ministry of Education of China, Ocean University of China. The system operates with a fiber and a narrow-band interference filter to reject daylight. A photon counter is used to improve the detection range. Two iodine filters are used to lock the transmitting laser frequency and to discriminate the Doppler frequency shift, respectively. The method to retrieve the wind profile is described. The detection range of wind profiles (with a 136 m vertical resolution) extends from 100 m to 15 km at night and to 12 km during daytime. The detection range covers the troposphere in the middle and high latitude areas. The comparison experiments between the lidar and radiosonde were performed both during the night and during the day. The standard deviation of the wind direction and speed were 15.5° and 3.1 m/s at night and 15.7° and of 3.2 m/s during the day. This system also has the capability to measure the aerosol backscattering ratio.