离水辐射非朗伯特性的Monte Carlo模拟及分析

唐军武; 田国良; 陈清莲

离水辐射非朗伯特性的Monte Carlo模拟及分析

1.
国家海洋局海洋技术研究所, 天津300111
2.
中国科学院遥感应用研究所, 北京100010

基金项目: 国家自然科学基金资助项目(编号:49871058);海洋“863”818-06-03支持项目;总装备部某遥感应用研究支持项目;海洋局青年基金资助项目(编号:97802)

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出版历程
- 收稿日期: 1998-09-07
- 修回日期: 1999-01-12

Bidirectionality of water-leaving radiance: simulation results and its correction

1.
Institute of Ocean Technology, State Oceanic Administration, Tianjin 300111
2.
Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100010

摘要

摘要: 水体光场的非朗伯特性(二向性)是目前水色反演算法中的误差因素之一。随着新一代高精度水色遥感器的发射,原来的许多次要因素已变得不可忽略。为研究水体光场的非朗伯特性,首先建立了一个三维MonteCarlo海洋光学模型,并利用国际上提出的7个海洋光学标准问题中的4个对模型的正确性进行了检验;在此基础上,模拟了不同太阳天顶角、体成分等参数对离水辐射率的方向特性的影响。模拟结果表明,在一定的遥感器-太阳-像元几何条件下,同一水体的光场二向性带来的离水辐射率变化可能大于已有的业务化水色大气修正算法反演高水辐射率的误差。模拟结果对水色遥感中正确进行现场数据获取及遥感与地面数据比对有一定的意义。
- 水体光场分布 /
- 离水辐射二向性 /
- MonteCarlo
Abstract: The bidirectionality of water light field is one of the error sources of the ocean color models which nowcommonly are used to retrieve pigments' concentrations. As the launching of new generation ocean color sensors, e. g. SeaWiFS, or the coming MODIS, the goal of accuracy of ocean color sensing is now much higher than that of CZCS. The original minor factors, such as the bidirectionality of water-leaving radiance, become more important for retrieving algorithms. The results are based on the three-dimensional Monte Carlo simulations, and some aspects that should be considered for in situ optical data collection and related remote sensor's calibration and validation activities, are proposed.
- Water light field distribution /
- bidirectionality of water-leaving radiance /
- three-dimensional Monte Carlo

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参考文献(20)

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