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太赫兹云雷达的外场试验结果及反演算法

Experimental results and cloud microphysical parameters retrieval of THz-band cloud profiling radar

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摘要

利用太赫兹云雷达的外场观测数据, 分析了观测时间段内的雷达回波特征; 基于最优估计理论, 研究太赫兹云雷达的液态云微物理参数反演算法, 反演得到液态云的微物理参数, 包括有效粒子半径、液态水含量、粒子数浓度和分布宽度参数。外场观测数据用例属于低云, 云层结构较稳定, 云类为层云或层积云, 云底和云顶回波较弱。反演结果与相关文献中的云微物理参数统计值基本相符, 在回波强度较大的区域有效粒子半径较大, 液态水含量较高, 云中粒子数浓度呈现随高度增加逐渐减小的趋势。

Abstract

The characteristics of THz-band cloud profiling radar experimental results are analyzed. Based on the optimal estimation theory, the characteristic of liquid cloud microphysical parameters, including effective radius, liquid water content, number density and distribution width parameter are retrieved. The observed cases are strat or stratocumulus, which belong to low cloud and have stable cloud structure, with relatively weak radar reflectivity at cloud bottom and top. The retrieval results are basically consistent with the statistical values of cloud microphysical parameters in the relevant literature. The effective radius is larger in the region with larger radar reflectivity, and the liquid water content is higher. The number density shows a trend of decreasing with height.

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中图分类号:TN959

DOI:10.11805/tkyda201902.0189

所属栏目:太赫兹科学技术

收稿日期:2018-10-24

修改稿日期:2018-12-22

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作者单位    点击查看

丁霞:上海无线电设备研究所, 上海 200090上海目标识别与环境感知工程技术研究中心, 上海 200090
何静:上海无线电设备研究所, 上海 200090上海目标识别与环境感知工程技术研究中心, 上海 200090
王平:上海无线电设备研究所, 上海 200090上海目标识别与环境感知工程技术研究中心, 上海 200090
王海涛:上海无线电设备研究所, 上海 200090上海目标识别与环境感知工程技术研究中心, 上海 200090

联系人作者:丁霞(miragedx@sina.com)

备注:丁 霞(1985-), 女, 湖北省仙桃市人, 博士, 工程师, 主要研究方向为太赫兹云雷达主动探测、云雷达数据处理、云微物理参数反演、中高层大气重力波数值模拟 .

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引用该论文

DING Xia,HE Jing,WANG Ping,WANG Haitao. Experimental results and cloud microphysical parameters retrieval of THz-band cloud profiling radar[J]. Thz, 2019, 17(2): 189-194

丁霞,何静,王平,王海涛. 太赫兹云雷达的外场试验结果及反演算法[J]. 太赫兹科学与电子信息学报, 2019, 17(2): 189-194

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