FY-3A/MERSI, ocean color algorithm, products and demonstrative applications
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A medium resolution spectral imager (MERSI) on-board the first spacecraft of the second generation of China’s polar-orbit meteorological satellites FY-3A, is a MODIS-like sensor with 20 bands covering visible to thermal infrared spectral region. FY-3A/MERSI is capable of making continuous global observations, and ocean color application is one of its main targets. The objective is to provide information about the ocean color products of FY-3A/MERSI, including sensor calibration, ocean color algorithms, ocean color products validation and applications. Although there is a visible on-board calibration device, it cannot realize the on-board absolute radiometric calibration in the reflective solar bands. A multisite vicarious calibration method is developed, and used for monitoring the in-flight response change and providing post-launch calibration coefficients updating. FY-3A/MERSI ocean color products consist of the water-leaving reflectance retrieved from an atmospheric correction algorithm, a chlorophyll a concentration (CHL1) and a pigment concentration (PIG1) from global empirical models, the chlorophyll a concentration (CHL2), a total suspended mater concentration (TSM) and the absorption coefficient of CDOM and NAP (YS443) from China’s regional empirical models. The atmospheric correction algorithm based on lookup tables and ocean color components concentration estimation models are described. By comparison with in situ data, the FY-3A/MERSI ocean color products have been validated and preliminary results are presented. Some successful ocean color applications such as algae bloom monitoring and coastal suspended sediment variation have demonstrated the usefulness of FY-3A/MERSI ocean color products.
Key wordsFY-3A/MERSI ocean color multisite calibration atmospheric correction China’s regional model
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- Sun Ling. 2005. Atmospheric correction and water constituent retrieval for HY-1A CCD [dissertation] (in Chinese). Qingdao: Institute of Oceanology, Chinese Academy of Science, 67–69Google Scholar
- Sun Ling, Guo Maohua, Li Sanmei, et al. 2010. Enteromorpha Prolifera monitoring with FY-3A MERSI around the sea area of Qingdao. Remote Sensing Information (in Chinese), 1: 64–68Google Scholar
- Sun Ling, Guo Maohua, Xu Na, et al. 2012. On-orbit response variation analysis of FY-3 MERSI reflective solar bands based on Dunhuang site calibration. Spectroscopy and Spectral Analysis (in Chinese), 32(7): 1869–1877Google Scholar
- Sun Ling, Hu Xiuqing, Guo Maohua, et al. 2012. Multisite calibration tracking for FY-3A MERSI solar bands. IEEE Trans Geosci Remote Sensing, 50(12): 10.1109/TGRS.2012.2215613Google Scholar
- Sun Ling, Zhang Jie. 2007. Analysis of influence of gaseous absorption on “HY-1A” CCD data: simulation and correction for Rayleigh scattering. Acta Oceanologica Sinica (in Chinese), 29(3): 137–145Google Scholar
- Sun Ling, Zhang Jie, Guo Maohua. 2006. Rayleigh lookup tables for HY-1A CCD data processing. J Remote Sens (in Chinese), 10(3): 306–311Google Scholar
- Tang Junwu, Wang Xiaomei, Song Qingjun, et al. 2004. The statistic inversion algorithms of water constituents for the Huanghai Sea and the East China Sea. Acta Oceanologica Sinica, 23(4): 617–626Google Scholar