偏振氧A 带光谱气溶胶垂直剖面反演的信息量分析和灵敏度研究

大气与环境光学学报 ›› 2022, Vol. 17 ›› Issue (3): 360-368.

偏振氧A 带光谱气溶胶垂直剖面反演的信息量分析和灵敏度研究

程璐璐, 施文杰, 夏果∗, 王江涛, 陈巧芹, 金施群

合肥工业大学光电技术研究院特种显示与成像技术安徽省技术创新中心, 省部共建现代显示技术国家重点实验室培育基地, 安徽合肥 230009

收稿日期:2020-12-09 修回日期:2022-04-08 出版日期:2022-05-28 发布日期:2022-05-28
通讯作者: E-mail: xiaguo@hfut.edu.cn E-mail:xiaguo@hfut.edu.cn
作者简介:程璐璐 (1996 - ), 女, 河南兰考人, 硕士研究生, 主要从事光谱数据预处理方面的研究。 E-mail: cuitong417@stu.ouc.edu.cn

Information content analysis and sensitivity of retrieval of aerosol vertical profiles using polarimetric oxygen A-band spectra

CHENG Lulu, SHI Wenjie, XIA Guo∗, WANG Jiangtao, CHEN Qiaoqin, JIN Shiqun

Laboratory of Special Display Technology of the Ministry of Education, National Engineering Laboratory of Special Display Technology, National Key Laboratory of Advanced Display Technology, Academy of Photoelectric Technology, Hefei University of Technology, Hefei 230009, China

Received:2020-12-09 Revised:2022-04-08 Published:2022-05-28 Online:2022-05-28

摘要/Abstract

摘要： 为评估从偏振氧 A 带光谱中提取的气溶胶垂直剖面的信息量及提高光谱分辨率对偏振测量的气溶胶垂直剖面信息的影响, 采用线性化矢量辐射传输模型 (UNL-VRTM), 对氧 A 波段线偏振度 (DoLP) 星载测量中气溶胶垂直剖面的信息量及不同观测条件和光谱分辨率下 DoLP 的气溶胶峰高信息量变化的影响因素进行分析。研究结果表明, DoLP 所包含的气溶胶峰高的信息比辐射度更多, 辐射度的信号自由度 (DFS) 最高为 0.49, 而 DoLP 的 DFS 为 0.76; 且随着光谱分辨率的提高, 气溶胶峰高信息量增加, 对表面反射率、观测几何以及先验误差的依赖大大降低。

关键词: 偏振, 气溶胶垂直剖面反演, 信息量分析, 光谱分辨率

Abstract: In order to evaluate the amount of vertical information on aerosol extinction profiles extracted from the O2 A-band polarization spectrum and the influence of improving spectral resolution on aerosol vertical profile information measured by polarization, the Unified Linearized Vector Radiative Transfer Model (UNL-VRTM) is used to analyze the information from satellite measurements of O2 A-band degree of linear polarization (DoLP) and the influencing factors of aerosol peak height information of DoLP under different observation conditions and spectral resolution. Simulation results show that DoLP contains more information content for aerosol peak height than radiation intensity, and the maximum degree of freedom of signal (DFS) of radiation intensity is 0.49, while the DFS of DoLP is 0.76. In addition, with the improvement of spectral resolution, the information content of aerosol peak height increases, and the dependence on surface albedo, observation geometry and prior error is greatly reduced.

Key words: polarization, retrieval of aerosol vertical profile, information analysis, spectral resolution

中图分类号:

O648.18

程璐璐, 施文杰, 夏果∗, 王江涛, 陈巧芹, 金施群. 偏振氧A 带光谱气溶胶垂直剖面反演的信息量分析和灵敏度研究[J]. 大气与环境光学学报, 2022, 17(3): 360-368.

CHENG Lulu, SHI Wenjie, XIA Guo∗, WANG Jiangtao, CHEN Qiaoqin, JIN Shiqun. Information content analysis and sensitivity of retrieval of aerosol vertical profiles using polarimetric oxygen A-band spectra[J]. Journal of Atmospheric and Environmental Optics, 2022, 17(3): 360-368.

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