Endeavors to enhance an accuracy of remote-sensing reflectance from the Geostationary Ocean Color Imager

Abstract

The process of atmospheric correction and the vicarious calibration for ocean color remote sensing from satellite play a significant role in the ocean color data quality. The first atmospheric correction algorithm for the Geostationary Ocean Color Imager (GOCI) is developed based on the Gordon and Wang (1994) and is partially modified regarding the correction of turbid water reflectance at NIR and aerosol reflectance estimation scheme. The GOCI turbid water atmospheric correction scheme iteratively restores NIR water reflectance by using spectral relationship model of water reflectance between red and two NIR bands. The GOCI aerosol reflectance estimate scheme determines appropriate aerosol models without considering single-scattering domain based on the spectral relationships of aerosol multiple-scattering reflectance between different wavelengths. Vicarious calibration of GOCI gain factors is also applied based on Franz et al. (2007) although GOCI observation area does not completely satisfy requirements of NIR band vicarious calibration. Detail schemes and their related issues of the GOCI atmospheric correction and vicarious calibration will be discussed.n Color Imager (GOCI) is developed based on the Gordon and Wang (1994) and is partially modified regarding the correction of turbid water reflectance at NIR and aerosol reflectance estimation scheme. The GOCI turbid water atmospheric correction scheme iteratively restores NIR water reflectance by using spectral relationship model of water reflectance between red and two NIR bands. The GOCI aerosol reflectance estimate scheme determines appropriate aerosol models without considering single-scattering domain based on the spectral relationships of aerosol multiple-scattering reflectance between different wavelengths. Vicarious calibration of GOCI gain factors is also applied based on Franz et al. (2007) although GOCI observation area does not completely satisfy requirements of NIR band vicarious calibration. Detail schemes and their related issues of the GOCI atmospheric correction and vicarious calibration will be discussed.