Detailed validation of the bidirectional effect in various Case 1 waters for application to ocean color imagery
Detailed validation of the bidirectional effect in various Case 1 waters for application to ocean color imagery
复制标题
详细验证各种案例 1 水域中应用于海洋颜色图像的双向效果
DOI：
10.5194/bg-4-781-2007
复制
发表时间：
2007
期刊：
影响因子：
4.9
通讯作者：
D. Antoine
中科院分区：
文献类型：
--
作者：
K. Voss;A. Morel;D. Antoine
抽象。从海洋中看到的辐射取决于照明和观察几何沿着与水的属性，这种变化被称为双向效应。这种双向效应取决于水的固有光学特性，包括体积散射函数，在比较来自不同卫星传感器的数据时非常重要。Morel等人（2002年）提出的包含双向效应的当前f/Q模型取决于模拟的而非测量的水参数，因此必须仔细验证。本文综合了几个航次的上升流辐射分布资料，在不同的水体类型和太阳天顶角范围内。我们比较了建模和测量的Lview/Lnadir，发现模型和数据之间的平均差异小于0.01，而模型和数据之间的RMS差异约为0.02-0.03。这完全在数据的统计噪声范围内，由于环境噪声源（例如波聚焦），数据的统计噪声在0.04-0.05的量级上。
Abstract. The radiance viewed from the ocean depends on the illumination and viewing geometry along with the water properties, and this variation is called the bidirectional effect. This bidirectional effect depends on the inherent optical properties of the water, including the volume scattering function, and is important when comparing data from different satellite sensors. The current model of f/Q, which contains the bidirectional effect, by Morel et al. (2002) depends on modeled, not measured, water parameters, thus must be carefully validated. In this paper we combined upwelling radiance distribution data from several cruises, in varied water types and with a wide range of solar zenith angles. We compared modeled and measured Lview/Lnadir and found that the average difference between the model and data was less than 0.01, while the RMS difference between the model and data was on the order of 0.02–0.03. This is well within the statistical noise of the data, which was on the order of 0.04–0.05, due to environmental noise sources such as wave focusing.