Atmospheric Correction of HJ-1 CCD Data for Water Imagery Based on Dark Object Model
ZHOU Li-guo1, MA Wei-chun1*, GU Wan-hua1, HUAI Hong-yan2
1. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China 2. Shanghai Environmental Monitoring Center, Shanghai 200030, China
Abstract：The CCD multi-band data of HJ-1A has great potential in inland water quality monitoring, but the precision of atmospheric correction is a premise and necessary procedure for its application. In this paper, a method based on dark pixel for water-leaving radiance retrieving is proposed. Beside the Rayleigh scattering, the aerosol scattering is important to atmospheric correction, the water quality of inland lakes always are case Ⅱ water and the value of water leaving radiance is not zero. So the synchronous MODIS shortwave infrared data was used to obtain the aerosol parameters, and in virtue of the characteristic that aerosol scattering is relative stabilized in 560 nm, the water-leaving radiance for each visible and near infrared band were retrieved and normalized, accordingly the remotely sensed reflectance of water was computed. The results show that the atmospheric correction method based on the imagery itself is more effective for the retrieval of water parameters for HJ-1A CCD data.
Key words：HJ-1A satellite;Inland water body;Atmospheric correction;Dark pixel
周立国1，马蔚纯1*，顾万花1，怀红燕2 . 基于清洁水体像元法的环境-1A卫星CCD水体图像大气校正[J]. 光谱学与光谱分析, 2011, 31(08): 2238-2242.
ZHOU Li-guo1, MA Wei-chun1*, GU Wan-hua1, HUAI Hong-yan2 . Atmospheric Correction of HJ-1 CCD Data for Water Imagery Based on Dark Object Model . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(08): 2238-2242.
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