多普勒激光雷达运动测风数据降噪处理

大气与环境光学学报 ›› 2011, Vol. 6 ›› Issue (4): 260-267.

多普勒激光雷达运动测风数据降噪处理

尹祺巍1, 刘智深1, 刘秉义1, 李志刚1, 姚琪2

（1 中国海洋大学海洋遥感研究所，山东青岛 266003；
2 中国电子科技集团公司第十四研究所，江苏南京 210039）

收稿日期:2010-12-17 出版日期:2011-07-28 发布日期:2011-07-18
通讯作者: 尹祺巍（1985—），汉族，山西阳泉人，研究生，主要从事大气探测激光雷达的研究。 E-mail:yinqiwei168@gmail.com
作者简介:尹祺巍（1985—），汉族，山西阳泉人，研究生，主要从事大气探测激光雷达的研究。
基金资助:
国家自然科学基金（40905005）、国家863课题（2006AA12Z155）、灾害天气国家重点实验室开放课题（2008LASW-B04）资助

Denoising Processing of Doppler Wind Lidar Data in Moving Measurement

YIN Qi-wei1, LIU Zhi-shen1, LIU Bing-yi1, LI Zhi-gang1, Yao Qi2

(1 Ocean Remote Sensing Institute, Ocean University of China, Qingdao 266003, China;
2 The 14th Research Institute of China Electronics Technology Group Corporation, Nanjing 210039, China)

Received:2010-12-17 Published:2011-07-28 Online:2011-07-18

摘要/Abstract

摘要：

车载测风激光雷达在进行移动测量时，激光雷达在各个方位的累积时间变短，另外还有天空背景光、大气湍流、机械振动的干扰以及暗噪声、电子学噪声的影响，回波信号的信噪比会因此降低，从而限制激光雷达的探测范围。在风廓线的反演过程中利用窗口大小随距离变化的滑动平均滤波器和中值滤波器可将12~15 km的平均信噪比提高2.8倍，因而可有效提高探测距离。

关键词: 车载测风激光雷达, 运动实验, 滑动平均, 中值滤波, 风廓线

Abstract:

When the mobile wind lidar is carrying out moving measurement, the cumulation time in every direction is much shorter than that in static measurement, and moreover, the sky background, atmospheric turbulence, mechanical vibration, dark noise and electronic noise of detector can heavily worsen the quality of backscattering signal. As a result, the detection range of wind lidar is greatly limited. Moving average filter and median filter whose operation windows length vary with distance can improve the averaged signal to noise ratio by a factor of 2.8 in the altitude range from 12 km to 15 km, which can effectively expand the detection range.

Key words: mobile wind lidar, moving experiment, moving average filter, median filter, wind profile

中图分类号:

TN958.98

尹祺巍刘智深刘秉义李志刚姚琪. 多普勒激光雷达运动测风数据降噪处理[J]. 大气与环境光学学报, 2011, 6(4): 260-267.

YIN Qi-Wei, LIU Zhi-Shen, LIU Bing-Yi, LI Zhi-Gang, YAO Qi. Denoising Processing of Doppler Wind Lidar Data in Moving Measurement[J]. Journal of Atmospheric and Environmental Optics, 2011, 6(4): 260-267.

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