| SUN Ling,GUO Maohua,ZHU Jianhua,HU Xiuqing,SONG Qingjun. 2013. FY-3A/MERSI, ocean color algorithm, products and demonstrative applications. Acta Oceanologica Sinica, 32(5):75－81 |
| FY-3A/MERSI, ocean color algorithm, products and demonstrative applications |
| FY-3A/MERSI, ocean color algorithm, products and demonstrative applications |
| Received:April 26, 2011 Revised:May 28, 2012 |
| DOI：10.1007/s13131-013-0316-2 |
| Key words:FY-3A/MERSI ocean color multisite calibration atmospheric correction China's regional model |
| 中文关键词: FY-3A/MERSI ocean color multisite calibration atmospheric correction China's regional model |
| 基金项目:The National Basic Research Program (973 Program) of China under contract No. 2010CB950803; National Meteorological Special Project of China under contract No. GYHY200906036. |
| Author Name | Affiliation | E-mail | | SUN Ling | Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration(LRCVES/CMA), Beijing 100081, China
National Satellite Meteorological Centre, China Meteorological Administration, Beijing 100081, China | sunling@cma.gov.cn | | GUO Maohua | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China | | | ZHU Jianhua | National Ocean Technology Centre, State Oceanic Administration, Tianjin 300112, China | | | HU Xiuqing | Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration(LRCVES/CMA), Beijing 100081, China
National Satellite Meteorological Centre, China Meteorological Administration, Beijing 100081, China | | | SONG Qingjun | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China | |
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| Abstract: |
| 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. |
| 中文摘要: |
| 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. |
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