Case study of atmospheric correction on CCD data of HJ-1 satellite based on 6S model

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Xue, Xiaoiuan^1,2 ; Meng, Oingyan^1 ; Xie, Yong^1 ; Sun, Zhangli^1 ; Wang, Chang^1,2 ; Zhao, Hang^1,2

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China^1

University of Chinese Academy of Sciences, Beijing 100039, China^2

关键词: 6Sradiativetransfer code;    Atmospheric corrections;    Atmospheric radiative transfer models;    HJ-1B/CCD;    Look up table;    Normalized difference vegetation index;    Reflectance values;    Surface reflectance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012215/pdf
DOI  :  10.1088/1755-1315/17/1/012215

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, atmospheric radiative transfer model 6S was used to simulate the radioactive transfer process in the surface-atmosphere-sensor. An algorithm based on the look-up table (LUT) founded by 6S model was used to correct (HJ-1) CCD image pixel by pixel. Then, the effect of atmospheric correction on CCD data of HJ-1 satellite was analyzed in terms of the spectral curves and evaluated against the measured reflectance acquired during HJ-1B satellite overpass, finally, the normalized difference vegetation index (NDVI) before and after atmospheric correction were compared. The results showed: (1) Atmospheric correction on CCD data of HJ-1 satellite can reduce the "increase" effect of the atmosphere. (2) Apparent reflectance are higher than those of surface reflectance corrected by 6S model in band1∼band3, but they are lower in the near-infrared band; the surface reflectance values corrected agree with the measured reflectance values well. (3)The NDVI increases significantly after atmospheric correction, which indicates the atmospheric correction can highlight the vegetation information.