【作者】 马森；

【导师】 刘智深；

【作者基本信息】 中国海洋大学 ， 物理海洋学， 2007， 硕士

【摘要】 本论文主要由五部分组成。第一部分引言简要介绍了机载海洋荧光激光雷达的应用状况、国际和国内动态以及未来发展趋势。第二部分机载海洋荧光激光雷达现场测量海表层叶绿素浓度实验研究是继续国家“十五”863资源与环境技术领域专题项目“航空遥感多传感器集成与应用技术系统”的研究内容。在该部分,首先,简要回顾了叶绿素浓度的反演理论,并在此基础上发展了利用激光雷达信号剖面提取激光和荧光的海水衰减系数对反演理论进行改进的算法;其次,介绍了两次机载飞行实验的实验海域、海况并着重对实验数据进行了处理、分析,获得了实验海域的叶绿素浓度分布情况;然后,对第二次飞行实验的结果与星载传感器(MODIS)同步测量的叶绿素浓度进行了初步对比和印证,取得了较好的结果。后三部分则属于国家“十一五”863资源环境技术领域专题课题“机载多通道激光雷达海面油污染监测技术”的研究内容。其中,第三部分激光雷达海表面溢油监测系统的设计主要介绍了激光诱导荧光原理、系统硬件和软件设计。硬件设计包括激光发射、光学接收、分光系统、光电转换、数据采集和供电等部分。软件设计包括数据采集、处理和显示功能的编写思路和算法流程设计。第四部分主要介绍了油膜厚度反演和油种类识别算法。利用MATLAB语言编写的程序,我们还对国外文献中的激光雷达数据进行了处理和分析,对各种反演算法进行了讨论,为选取可靠的溢油参数提取算法和系统设计提供了依据。第五部分介绍了实验室油荧光光谱探测系统,并获得了不同种类油(轻油和重油)的荧光光谱,利用该光谱数据验证了论文第四部分涉及的主成分分析算法和光谱匹配算法的可靠性,为下一步机载海洋荧光激光雷达海表溢油监测系统的软硬件设计奠定了的基础。论文的最后部分对本论文的工作做了简要的总结,并指出了下一步工作需要努力的方向。更多还原

【Abstract】 This essay is mainly consisted of five parts: The first part is introduction which narrates the applications of airborne oceanographic fluorescence lidar, the actualities at home and abroad, and the development in the future.The second part is the research for field detection of chlorophyll-a concentration in the sea surface layer which succeeds the item“Integrated Airborne Multi-sensor System for Marine Applications”, which belongs to the tenth five-year plan in National 863 Resource and Environment technique field. In this part, first, the theory for chlorophyll-a concentration retrieval is disserted. The precision of the theory is improved by calculating the seawater attenuation coefficients of chlorophyll-a fluorescence and Raman scattering using the lidar signal profiles; second, the ocean states for two field experiments are expressed, and the distribution of chlorophyll-a in those sea fields are retrieved and analyzed; third, the chlorophyll-a concentration of the second field experiment is compared and validated with the same products simultaneously measured by MODIS, which shows a good consistency.The latter three parts are contents of the item“Monitoring oil pollutants on the sea surface by an airborne multi-channel oceanographic fluorescence lidar”which belongs to the eleventh five-year plan. The third part introduces the principles of fluorescence, and the designs of the hardware and software lidar system. The hardware system includes the laser emitter, the optical receiver, the spectrometer, the photo-electric converter, the ADC, and the power supply. The software includes the algorithm patterns for data collection, process and display.The fourth part mainly specifies the algorithms for oil thickness retrieval and oil identification. Using the MATLAB codes, we process and analyze the lidar signals from foreign lidar system. Kinds of algorithms are discussed, and some conclusions are given.The fifth part introduces the system for oil fluorescence spectra detection in the laboratory. Some kinds of oil spectra on the market are given. The PCA and SM (Spectral Matching) algorithms in the fourth part are tested, which paves the way for the design of airborne system.The last part of this essay gives a brief summary of its work, and puts forward the improvements needed in the future.更多还原