The influence of coherent waves on the remotely sensed reflectance.
The influence of coherent waves on the remotely sensed reflectance.
复制标题
相干波对遥感反射率的影响
DOI：
10.1364/oe.9.000260
复制
发表时间：
2001
期刊：
影响因子：
3.8
通讯作者：
Paul Hwang
中科院分区：
文献类型：
--
作者：
J. Zaneveld;Emmanuel Boss;Paul Hwang
在假设海洋表面是波浪的随机总和的研究中，发现海浪会增强照明源方向的反向散射。在这里，我们研究了在海洋中短重力波波峰附近共存的相干毛细管重力波列增强的反向散射。我们发现，增强的反向散射效应相对于随机表面而言更强，并且在更大的角度下观察到该效应。这种效应不仅会影响激光雷达等视角接近源视角的有源传感器，而且还可能影响无源传感器。当尝试关闭不包括海洋表面的真实表示和观察到的水离开辐射的辐射传输模型时，这种效应可能会导致偏差。
Oceanic waves have been found to contribute enhanced back-scattering in the direction of the illumination source in studies that assumed the ocean surface to be a random sum of waves. Here we investigate enhanced back-scattering by coherent capillary-gravity wave trains that co-exist near the crests of short gravity waves in the ocean. We find that the enhanced back-scattering effect is intensified relative to that of a random surface and that the effect is observed at larger angles. This effect may not only affect active sensors such as lidar, which have a viewing angle close to that of the source but possibly passive sensors as well. This effect is likely to result in biases when attempting closure between radiative transfer models that do not include realistic representation of the ocean surface and observed water leaving radiance.