| 摘要: |
| 海洋水体向上的辐射由水中多种成分的浓度所决定，同时辐射的强度十分微弱并随着时间和空间在变化。因此，海洋水色遥感需要从水体和大气辐射传递机理出发，研究到达卫星遥感器的辐射模式，以达到模拟仿真卫星水色遥感图像和卫星图像质量预测的目的。本研究通过叶绿素、悬浮泥沙和黄色物质等海洋水色的主要因子，分别从可见光波段和荧光波段对辐射的贡献出发，发展了海洋水体离水辐射率模式。在卫星水色遥感机理的基础上，同时运用Iqbal，Gordon和Sturm等的大气程辐射模式和太阳耀光模式，使卫星海洋水色遥感的辐射模式系统化，模拟仿真了我国1990年9月3日发射的FY-1B卫星两个海洋水色通道的全轨道辐射图像，同时利用从德国柏林大学气象中心接收到的1990年9月23－25日卫星图像进行验证。结果认为，本文所发展的模式可应用于卫星图像质量的预测和水色信息的提取。 |
| 关键词: 水色遥感 辐射模式 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金!49493400，49376275 |
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| STUDY ON RADIANCE MODELS FOR OCEAN COLOUR REMOTE SENSING |
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Pan Delu, Li Shuing, Mao Tiariming
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Second Institute of Oceanography, SOA, Hangzhou 310012
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| Abstract: |
| The radiance leaving from ocean water surface, which is very small and variable, is depended on the concentration of water constituents and the water properties. So, it is necessary to develop the models to calculate the radiance arriving at the satellite sensor in accurate based on the radiative transmission. This paper focused on the development of the models which are used to calculate the leaving water radiance, by means of the analysis of the radiative contribution of the main water constituents, such as chlorophyll, suspended sediment and yellow substance, respectively in the visible and fluorescent wavelength. On the basis of the mechanism of ocean color remote sensing, the developed models here and the atmospherical path radiance and sun glitter models developed by Iqbal, Gorden and Sturm are formed a series of model for ocean color remote sensing. The series of model have been applied to simulate the orbital radiance imagery of two ocean color channels of Chinese satellite FY-1B launched on Sept. 3, 1990. The simulated imagery have been compared by the real imagery which received by Berlin University, Germany on the Oct. 23 - 25, 1990. The results showed that the developed models could be used to product the quality of satellite imagery before satellite orbiting and to the analysis of ocean color satellite data. |
| Key words: Ocean colour remote sensing, Models of radiance |
