| 模型ID： | M00041 | ||||||
| 模型名称： | 核驱动模型 | ||||||
| 模型编码者： |
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| 模型关键字： | 散射权重、体散射核、几何光学核、最小二乘法 | ||||||
| 模型类型： | 半经验模型 | ||||||
| 模型最后修改日期： | |||||||
| 模型提交日期： | |||||||
| 模型摘要： | 二向性反射可以分解为各向同性反射（常量）、体散射、几何体反射三部分的权重之和，而每个部分使用不同的 BRDF 模型核，按最小误差原则组合成一个新的BRDF模型，即核驱动模型。 | ||||||
| 公式： |
| 1 |
名称：观测数
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参数类型：int
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物理意义：描述设定的角度的数
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| 2 |
名称：波段数
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参数类型：int
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物理意义：描述使用的波段数
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| 3 |
名称：观测天顶角
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参数类型：double
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物理意义：描述观测位置
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| 4 |
名称：观测方位角
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参数类型：double
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物理意义：描述观测位置
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| 5 |
名称：太阳天顶角
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参数类型：double
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物理意义：描述太阳位置
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| 6 |
名称：太阳方位角
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参数类型：double
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物理意义：描述太阳位置
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| 7 |
名称：反射率
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参数类型：double
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物理意义：在反演模式中为对应太阳位置、对应波段的反射率（列数与波段数一致），存在于输入文件中；
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| 8 |
名称：核的数量
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参数类型：int
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物理意义：描述参与模型计算的核的数量
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| 9 |
名称：核编码
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参数类型：double
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物理意义：依次为对应的核的编码
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| 10 |
名称：RMSE
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参数类型：double
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物理意义：反演得到的模型的所有波段观测反射率的均方根误差
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| 11 |
名称：各向同性项权重
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参数类型：double
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物理意义：对应波段的各向同性核的权重系数
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| 12 |
名称：几何光学项权重
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参数类型：double
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物理意义：对应波段的几何光学核的权重系数
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| 13 |
名称：体散射项权重
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参数类型：double
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物理意义：体散射项权重
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| 14 |
名称：白天空反照率
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参数类型：double
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物理意义：对应波段的白天空反照率
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| 15 |
名称：黑天空反照率
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参数类型：double
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物理意义：NULL对应波段在不同太阳天顶角（依次在0°、=30°、45°、60°）的的黑天空反照率
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| 标题： | A bidirectional reflectance model of the earth's surface for the correction of remote sensing data. | ||||||
| 文献作者： |
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| 文献引用： | Journal of Geophysical Research | ||||||
| 文献摘要: | A surface bidirectional reflectance model has been developed for the correction of surface bidirectional effects in time series of satellite observations, where both sun and viewing angles are varying. The model follows a semiempirical approach and is designed to be applicable to heteroge-neous surfaces. It contains only three adjustable parameters describing the surface and can potentially be included in an algorithm of processing and correction of a time series of remote sensing data. The model considers that the observed surface bidirectional reflectance is the sum of two main processes operating at a local scale: (1) a diffuse reflection component taking into account the geometrical structure of opaque reflectors on the surface, and shadowing effects, and (2) a volume scattering contribution by a collection of dispersed facets which simulates the volume scattering properties of canopies and bare soils. Detailed comparisons between the model and in situ observations show satisfactory agreement for most investigated surface types in the visible and near-infrared spectral bands. The model appears therefore as a good candidate to reduce substantially the undesirable fluctuations related to surface bidirectional effects in remotely sensed multitemporal data sets. |
模型公式