不同天气类型下全光纤相干激光测风雷达探测性能分析

发布时间：2018-04-25 00:38

本文选题：遥感 + 探测性能　；参考：《中国激光》2017年02期

【摘要】：为了给低空飞行安全气象服务奠定基础,根据2015年7~9月国内新研制的全光纤相干激光测风雷达,联合边界层风廓线雷达和双经纬仪探空气球在我国东北某地获取的探测实验资料,对比了晴天、阴天、雾霾天和雨天4种天气类型下激光测风雷达和风廓线雷达与探空气球风场探测的相关性,以评估激光测风雷达的测风精度和稳定性。结果表明,晴、阴和雾霾天条件下,激光测风雷达测风精度优于风廓线雷达,其水平风与真值误差的标准差低于风廓线雷达的一半;雨天条件下,激光测风雷达探测高度受限,最大可测高度仅为风廓线雷达的一半,表明其风场探测受降水衰减影响比风廓线雷达严重。激光测风雷达测风稳定性优于风廓线雷达,垂向连续高度上其与真值的相关系数变化小且均达到0.9以上。晴、阴和雾霾天条件下,两种雷达测风精度均受大气风速变化影响,且随大气风速增加呈不同变化趋势。
[Abstract]:In order to lay the foundation for the meteorological service of low altitude flight safety, according to the newly developed all optical fiber coherent lidar in China from July to September 2015, Combined with boundary layer wind profile radar and double theodolite sounding balloon, the experimental data obtained in a certain place in northeast China are compared between sunny and overcast days. In order to evaluate the accuracy and stability of the laser wind radar, the correlation between the laser wind radar and the wind profile radar and the detection of the air spherical wind field under four weather types of haze weather and rainy day is discussed in order to evaluate the accuracy and stability of the laser wind detection radar. The results show that under sunny, overcast and haze conditions, the accuracy of the laser wind radar is better than that of the wind profile radar, and the standard deviation between the horizontal wind and the true value is less than half that of the wind profile radar, and the detection height of the laser wind measuring radar is limited under rainy weather. The maximum measurable height is only half of that of the wind profile radar, which indicates that the wind field detection is more affected by the precipitation attenuation than the wind profile radar. The stability of the laser wind measuring radar is better than that of the wind profile radar. The correlation coefficient between the laser wind radar and the true value at the vertical continuous height has little change and reaches more than 0.9. In sunny, cloudy and haze weather conditions, the accuracy of the two radar wind measurements is affected by the variation of atmospheric wind speed, and varies with the increase of atmospheric wind speed.
【作者单位】：成都信息工程大学大气科学学院高原大气与环境四川省重点实验室;成都西南技术物理研究所;成都信息工程大学电子工程学院;
【基金】：国家自然科学基金(91537214,91437113)
【分类号】：TN959.4

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