水下目标光学隐蔽深度遥感获取方法

针对用透明度盘深度(SD)估计水下目标的光学隐蔽深度(OCD)的方法缺乏科学性与准确性,提出了利用水色卫星遥感数据获取水下目标光学隐蔽深度的方法。在给出水下目标光学隐蔽深度概念的基础上,分析了水下目标对水中光传输的影响,并根据目标背景对比度传输方程建立了水下目标隐蔽深度与透明度盘深度的转换关系。建立了水下目标光学隐蔽深度的遥感获取模式,并对模式进行了实验验证。结果表明,黑色模型的理论计算和实测数据的相对误差小于30%,而白色模型的理论计算和实测数据的相对误差小于20%。

Because of the huge difference of optical characteristic between underwater target and Scchi-Disk, it was unscientific and inaccurate to estimate the optical concealment depth (OCD) of underwater target using Scchi-Disk depth (SD). A method to determine the optical concealment depth of underwater target by satellite remote sensing of ocean color is proposed. The influence of underwater target on light transmission in the water was analyzed on the foundation of the concept of underwater target optical concealment depth, and the semi-analysis transform model of the Scchi-Disk depth and underwater target optical concealment depth was obtained based on the transfer equation of contrast. Then the model of retrieving the optical concealment depth of underwater target by remote sensing of ocean color was setup. Finally, an in-situ experiment was implemented, and the results of experiment showed that the black model error of theoretical and experimental data was less than 30%, while for the white mode the error was less than 20%.