| 最小二乘法拟合大气激光雷达回波信号估算消光系数边界值 |
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| 引用本文： | 贺应红,郑玉臣,程娟,左浩毅,杨经国.最小二乘法拟合大气激光雷达回波信号估算消光系数边界值[J].量子电子学报,2004,21(6):879-883. |
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| 作者姓名： | 贺应红 郑玉臣 程娟 左浩毅 杨经国 |
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| 作者单位： | 1. 四川大学物理系,四川,成都,610064
2. 香港城市大学物理及材料科学系 |
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| 基金项目： | 国家自然科学基金资助(60078020)
国防科技重点实验室基金资助(00JS75.3.1.JW1906) |
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| 摘 要： | 报道了一种使用最小二乘法拟合大气激光雷达回波信号，计算消光系数边界值的算法。对于无云层天气条件，利用最小二乘法对回波信号全程拟合获得大气消光系数边界值，在有云层天气下，先将激光雷达信号在大气中的传输光路分解为云层区和非云层区，忽略回波信号中的云层信息，并假设在非云层区大气近似均匀，利用最小二乘法拟合获得大气消光系数边界值。最后利用消光系数边界值求解激光雷达方程，反演获得大气消光系数，实际计算证明，用此算法可获得与实际更为接近的大气消光系数反演结果。
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| 关 键 词： | 大气光学 激光雷达 消光系数边界值 大气消光系数 最小二乘法拟合 |
| 文章编号： | 1007-5461(2004)06-0879-05 |
| 收稿时间： | 2003/9/5 |
| 修稿时间： | 2003年9月5日 |
Estimation of extinction efficient boundary value with least-square fitting for lidar return signal |
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| HE Ying-hong,Andrew Yuk Sun Cheng,CHENG Juan,ZUO Hao-yi,YANG Jing-guo.Estimation of extinction efficient boundary value with least-square fitting for lidar return signal[J].Chinese Journal of Quantum Electronics,2004,21(6):879-883. |
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| Authors: | HE Ying-hong Andrew Yuk Sun Cheng CHENG Juan ZUO Hao-yi YANG Jing-guo |
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| Abstract: | A new type of method for estimating extinction efficient boundary values with least square fitting for inversion of slant angle lidar measurement is reported. In cloudless weather, the boundary values of extinction is calculated by fitting lidar return signal. For cloudy weather, firstly, the measured region is divided into cloudy and cloudless section. Then it is assumed that the cloudless region is homogenous circumstance. The boundary values of extinction is calculated by fitting lidar return signal except the cloudy region. Finally, the atmospheric extinction coefficients are inversed with Klett's inversion algorithm and the boundary values. The simulation results are close to the real atmospheric conditions. |
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| Keywords: | atmospherics optics lidar extinction efficient boundary values extinction coefficient least-square fitting |
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