A Quickly Atmospheric Correction Method for HJ-1 CCD with Deep Blue Algorithm
WANG Zhong-ting1，2, WANG Hong-mei3, LI Qing1, ZHAO Shao-hua1, LI Shen-shen2, CHEN Liang-fu2
1. Satellite Environment Center, Ministry of Environmental Protection, Beijing 100094, China 2. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 3. Kunming University of Science and Technology, Kunming 650500, China
Abstract：In the present, for the characteristic of HJ-1 CCD camera, after receiving aerosol optical depth (AOD) from deep blue algorithm which was developed by Hsu et al. assisted by MODerate-resolution imaging spectroradiometer (MODIS) surface reflectance database, bidirectional reflectance distribution function (BRDF) correction with Kernel-Driven Model, and the calculation of viewing geometry with auxiliary data, a new atmospheric correction method of HJ-1 CCD was developed which can be used over vegetation, soil and so on. And, when the CCD data is processed to correct atmospheric influence, with look up table (LUT) and bilinear interpolation, atmospheric correction of HJ-1 CCD is completed quickly by grid calculation of atmospheric parameters and matrix operations of interface define language (IDL). The experiment over China North Plain on July 3rd, 2012 shows that by our method, the atmospheric influence was corrected well and quickly (one CCD image of 1 GB can be corrected in eight minutes), and the reflectance after correction over vegetation and soil was close to the spectrum of vegetation and soil. The comparison with MODIS reflectance product shows that for the advantage of high resolution, the corrected reflectance image of HJ-1 is finer than that of MODIS, and the correlation coefficient of the reflectance over typical surface is greater than 0.9. Error analysis shows that the recognition error of aerosol type leads to 0.05 absolute error of surface reflectance in near infrared band, which is larger than that in visual bands, and the 0.02 error of reflectance database leads to 0.01 absolute error of surface reflectance of atmospheric correction in green and red bands.
王中挺1，2，王红梅3，厉 青1，赵少华1，李莘莘2，陈良富2 . 基于深蓝算法的HJ-1 CCD数据快速大气校正模型 [J]. 光谱学与光谱分析, 2014, 34(03): 729-734.
WANG Zhong-ting1，2, WANG Hong-mei3, LI Qing1, ZHAO Shao-hua1, LI Shen-shen2, CHEN Liang-fu2 . A Quickly Atmospheric Correction Method for HJ-1 CCD with Deep Blue Algorithm . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(03): 729-734.
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