The limits of visibility of spilled oil sheens
The limits of visibility of spilled oil sheens
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发表时间：
1996-11
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通讯作者：
H. M. Brown;J. Bittner;R. Goodman
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作者：
H. M. Brown;J. Bittner;R. Goodman
国际公约起草了船只将石油从船上排出的法规，但没有简单的方法来监视船只以确保遵守法规。从低空飞机中检测到的船尾有可见光泽的存在表明违规，即使视觉观察相对于其他遥感技术的有效性尚不清楚。这项研究检查了在较大的室外波盆地平静的水条件下的几种常见油的非常薄的纯净。从水面上方30 m的平台观察到光，并用紫外摄像头和通用摄像机进行监测。在理想的观看条件下，可以检测到一些薄至0.08 {mu} m的油。在检测薄油膜时，在360 nm处运行的紫外摄像头比人眼稍微敏感。讨论了光泽检测性与船舶出院率的关系。 2 Refs。，4图，2个标签。
Regulations governing the discharge of oil into the sea from ships have been drafted by international conventions, but there is no simple method of monitoring ships to ensure that the regulations are adhered to. The presence of a visible sheen in a ship`s wake, detected from a low flying aircraft, is assumed to indicate a violation, even though the effectiveness of visual observation relative to other remote sensing techniques is unknown. This study examined very thin sheens of several common oils under calm water conditions in a large outdoor wave basin. Sheens were observed from a platform 30 m above the water surface and monitored with both an ultraviolet camera and with a common video camera. Under ideal viewing conditions, sheens of some oils as thin as 0.08 {mu}m could be detected. A UV camera operating at 360 nm was slightly more sensitive than the human eye in detecting thin oil films. The relationship of sheen detectibility to ship discharge rate is discussed. 2 refs., 4 figs., 2 tabs.