利用遥感技术监测船舶航速的方法研究

主要讨论了两种利用遥感技术提取水面运动船舶的航速方法：利用波高谱信息提取航速和利用船尾迹中的横波信息提取航速。作者介绍了这两种方法的原理，描述了利用遥感技术提取船舶航速的工作流程，并利用模拟和实测的船尾迹波高数据对这两种方法进行了验证。从计算结果看，两种方法精度都能满足仅要求航速量级的需求者，利用波高谱信息的方法误差（10％左右）小于利用横波信息的方法误差（20％左右）。该项研究为实时或近实时探测运动船舶航速提供了新的方法。

Study on the Detection of a Moving Ship's Speed Using Remote Sensing Techniques

Information about ship movement on water surface is one of the important detected objects in many fields such as water carriage engineering and military. In this paper, two indirect methods for the estimation of a moving ship's speed by using remote sensing techniques are discussed because there is a close relation between static characteristics of ship wake and ship speed. To extract ship speed, one method is about using wave height spectra information of ship wake, and other method about using transverse wave information of ship wake. After the theory of these two methods is introduced, a scheme about extraction of a ship's speed by using remote sensing techniques is described and these two methods are validated by using simulated and observed ship wake wave height data. It can be seen from the calculated results that both the two methods meet the requirement of people who need to know only magnitude of ship speed and error of the method on using wave height spectra to extract ship speed. The study shows a new method to real-timely or nearly real-timely detect the speed of a moving ship and has good perspective on its applications in the fields of enhancing ship management ability, military monitoring ability, and attacking military objects ability.