多波长偏振激光雷达的大气温度探测
发布时间：2018-10-07 20:25
【摘要】：探测和监控大气温度的分布不仅能够准确地预测天气变化情况、大气环境状况,而且对于应对极端灾害性天气和遏制全球气候变暖也具有一定积极意义。传统微波雷达探测系统工作距离有限,易受到卷云和气溶胶颗粒的干扰,探测到的温度数据与实际结果吻合度低、误差高、可靠性不足。采用一种多波长偏振激光雷达对大气的温度变化情况进行监控,雷达系统接收大气中O_2和N_2向后散射的回波信号,依据数值模拟选择最优的探测波长并调整带宽范围;基于T矩阵算法获取不同相态下大气粒子的激光频谱特征,进而识别出激光雷达的反射率因子、比差分相移、发射率等偏振参量的变化情况,最终实现对大气温度的精准测量。实验分析表明,多波长偏振激光雷达得到的数据准确、可靠,能够用于对大气温度的探测和研究。
[Abstract]:Detecting and monitoring the distribution of atmospheric temperature can not only accurately predict the weather and atmospheric environment, but also play a positive role in dealing with extreme disastrous weather and curbing global warming. The traditional microwave radar detection system is easy to be interfered by cirrus cloud and aerosol particles because of its limited operating distance. The temperature data detected are in low agreement with the actual results and the error is high and the reliability is insufficient. A multi-wavelength polarization lidar is used to monitor the temperature change of the atmosphere. The radar system receives the backscattering echo signals of O _ S _ 2 and N _ S _ 2 in the atmosphere, selects the optimal detection wavelength and adjusts the bandwidth range according to the numerical simulation. Based on the T matrix algorithm, the laser spectrum characteristics of atmospheric particles in different phase states are obtained, and then the laser radar reflectivity factor, ratio differential phase shift, emissivity and other polarization parameters are identified. Finally, the accurate measurement of atmospheric temperature is realized. The experimental results show that the data obtained by multi-wavelength polarization lidar are accurate and reliable and can be used to detect and study atmospheric temperature.
【作者单位】： 桂林电子科技大学信息科技学院;
【基金】：国家自然科学基金(61661016)
【分类号】：TN958.98
本文编号：2255561
[Abstract]:Detecting and monitoring the distribution of atmospheric temperature can not only accurately predict the weather and atmospheric environment, but also play a positive role in dealing with extreme disastrous weather and curbing global warming. The traditional microwave radar detection system is easy to be interfered by cirrus cloud and aerosol particles because of its limited operating distance. The temperature data detected are in low agreement with the actual results and the error is high and the reliability is insufficient. A multi-wavelength polarization lidar is used to monitor the temperature change of the atmosphere. The radar system receives the backscattering echo signals of O _ S _ 2 and N _ S _ 2 in the atmosphere, selects the optimal detection wavelength and adjusts the bandwidth range according to the numerical simulation. Based on the T matrix algorithm, the laser spectrum characteristics of atmospheric particles in different phase states are obtained, and then the laser radar reflectivity factor, ratio differential phase shift, emissivity and other polarization parameters are identified. Finally, the accurate measurement of atmospheric temperature is realized. The experimental results show that the data obtained by multi-wavelength polarization lidar are accurate and reliable and can be used to detect and study atmospheric temperature.
【作者单位】： 桂林电子科技大学信息科技学院;
【基金】：国家自然科学基金(61661016)
【分类号】：TN958.98
【相似文献】
相关期刊论文 前3条
1 王刚,孔祥保;激光雷达测量大气温度的理论模拟[J];半导体光电;2004年01期
2 竹孝鹏;刘继桥;陈卫标;;大气温度对基于瑞利散射双边缘技术激光测风雷达的影响[J];中国激光;2010年08期
3 伯广宇;刘博;钟志庆;周军;;探测大气温度和气溶胶的瑞利-拉曼-米氏散射激光雷达[J];光学学报;2010年01期
相关博士学位论文 前6条
1 刘施菲;激光雷达辅助的惯性导航组合系统技术研究[D];哈尔滨工程大学;2015年
2 王强;基于激光雷达数据与多角度遥感模型的森林参数反演研究[D];哈尔滨工业大学;2017年
3 徐璐;Gm-APD脉冲累积激光雷达探测性能提高的研究[D];哈尔滨工业大学;2017年
4 叶光超;条纹阵列探测激光雷达测距精度与三维测绘技术研究[D];哈尔滨工业大学;2016年
5 尚震;纯转动拉曼激光雷达探测对流层中底部大气温度[D];中国科学技术大学;2017年
6 吕丹;基于点法向量姿态估计的激光雷达距离像目标识别算法研究[D];哈尔滨工业大学;2016年
相关硕士学位论文 前3条
1 王刚;非相干激光雷达测量大气风速的研究[D];电子科技大学;2004年
2 闫召爱;基于碘分子滤波器的大气测温激光雷达的研究[D];中国海洋大学;2007年
3 吴敏;大气温度探测拉曼散射激光雷达的关键技术研究[D];西安理工大学;2008年
，本文编号：2255561
本文链接：https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2255561.html
