摘要
环境减灾二号A/B卫星配置大气校正仪,为大气校正提供高精度大气参数信息。文章基于6S辐射传输模型,利用大气校正仪获取的大气参数对16 m相机进行同步大气校正和反射率反演,获得了合肥小麦田和敦煌戈壁滩2种典型地物的大气校正结果,并与中分辨率成像光谱仪(MODIS)地表反射率产品和地面实测光谱分别进行对比验证。结果表明:大气校正后图像清晰度明显提高,且与MODIS产品具有较好的一致性,相关系数达到98%以上;反演获得的地表反射率与地面实测数据相对误差保持在18%以下,大气校正效果明显且适用性强。
A PSAC(polarization synchronous atmospheric corrector) is equipped on HJ-2 A/B sate llites to provide high-precision atmospheric parameters information for atmospheric correction. Synchronous atmospheric correction and reflectivity inversion for the 16 m camera are carried out with atmospheric parameters obtained from PASC based on the 6 S radiative transfer model. The atmospheric correction results of two typical ground objects in Hefei wheat fields and Dunhuang Gobi desert are retrieved and then compared with their MODIS surface reflectance products as well as the ground-measured spectra respectively. The results show that image clarity is improved after atmospheric correction and demonstrates great consistency with the related MODIS products with more than 98% in correlation coefficient. The error remains less than 18% between the surface reflectivity obtained by inversion and the ground measured data. Atmospheric correction has obvious effect and high applicability.
作者
王宇轩
黄红莲
刘晓
孙晓兵
林军
WANG Yuxuan;HUANG Honglian;LIU Xiao;SUN Xiaobing;LIN Jun(Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;China Centre for Resources Satellite Data and Application, Beijing 100094, China)
出处
《航天器工程》
CSCD
北大核心
2022年第3期110-115,共6页
Spacecraft Engineering
基金
航天科技创新应用研究项目。
