高分十四号多光谱数据的气溶胶光学厚度反演  

Retrieval of Aerosol Optical Depth Based on GF-14 Multispectral Data

作　　者：刘状 王建荣 卢学良[1,2] 曹彬才 丁磊[3] LIU Zhuang;WANG Jianrong;LU Xueliang;CAO Bincai;DING Lei(State Key Laboratory of Geo-information Engineering,Xi’an 710054,China;Xi’an Research Institute of Surveying and Mapping,Xi’an 710054,China;Xi’an Aerors Data Technology Co.Ltd.,Xi’an 710054,China)

机构地区：[1]地理信息工程国家重点实验室,西安710054 [2]西安测绘研究所,西安710054 [3]西安航天天绘数据技术有限公司,西安710054

出　　处：《遥感信息》2024年第5期148-156,共9页Remote Sensing Information

基　　金：地理信息工程国家重点实验室开放基金(SKLGIE2021-zz-2);航天系统部综合研究项目(TJ20223C040257)。

摘　　要：高分十四号(GF-14)是我国“高分辨率对地观测系统”专项十三五收官星,多光谱传感器是搭载在高分十四号上的主要载荷之一,GF-14多光谱传感器具有高空间分辨率的特点,在大气气溶胶的遥感监测方面具有良好的应用前景,但目前还未有针对GF-14多光谱影像的气溶胶反演研究。文章旨在建立从GF-14原始影像到气溶胶光学厚度(aerosol optical depth,AOD)反演结果的全部流程,通过计算波段太阳平均辐照度将原始影像校正为表观反射率,在暗像元和亮地表像元处分别采用改进暗像元算法和深蓝算法反演AOD,得到两种算法融合的AOD产品。反演结果经过交叉验证,与MODIS AOD数据集相关系数达到0.89,与AERONET地基站点数据相关系数达到0.87,表明GF-14 AOD融合产品具有较高的精度,可以应用于大气环境监测、大气校正和定量遥感等领域,并为相关研究提供有益借鉴。GF-14 is the final star of the 13th Five-Year Plan of China’s"High-Resolution Earth Observation System of Systems",and the multispectral sensor is one of the main payloads carried on GF-14.The GF-14 multispectral sensor features high spatial resolution,and it has a good prospect of application in remote sensing and monitoring of atmospheric aerosols.However,there is no aerosol inversion study for GF-14 multispectral images.In this paper,we aim to establish the whole process from the original GF-14 image to the aerosol optical depth(AOD)inversion results,correct the original image to the apparent reflectance by calculating the average solar irradiance of the wavelength band,and then invert the AOD at the dark pixel and the bright surface pixel using the improved dark pixel algorithm and the deep blue algorithm,respectively,and get the AOD products fused with these two algorithms.The inversion results are cross-validated,and the correlation coefficients with MODIS AOD dataset reach 0.89 and with AERONET ground-based site data reach 0.87,which indicates that the GF-14 AOD fusion product has high accuracy and can be applied in the fields of atmospheric environment monitoring,atmospheric correction and quantitative remote sensing,and provides useful reference for related research.

关 键 词：气溶胶光学厚度 改进暗像元算法 深蓝算法 定量遥感 多光谱影像 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]