以航空平台为载体的机载测深激光雷达（Airborne Lidar Bathymetry, ALB）技术，可有效避免传统水深测绘技术在近岸浅水区域探测条件的限制，具有稳定、精确、全覆盖的技术特点。目前，项目组通过自主研发方式制造了一套单波段机载测深激光雷达系统，并已通过了实用化测试。实践证明，复杂变化的水体环境是造成激光水深探测精度下降的主要原因。本项目计划以蓝绿激光水深探测数据过程中存在的不确定性问题为重点展开具体研究，通过对回波信号多级衰减与激光水下传播过程的研究，构建蓝绿激光水下分层传输模型，并在此基础上计划提出一种基于系统扫描过程的时空约束精度优化方法，从而在保证作业方式简洁性的基础上，提高单波段机载测深激光雷达系统水深探测准确性。本项目旨在实现近岸水域空间信息获取的方法性突破，相关研究成果将为激光雷达系统研发、激光测深技术以及近岸海洋环境监测方法提供有效可靠的技术参考。

Airborne Lidar Bathymetry (ALB) is characterized by stability, accuracy and wide coverage, and represents the important development direction in the field of bathymetric survey, which can effectively avoid the limitation caused by complex underwater in coastal and offshore region. At present, the research team of the applicant have developed a set of single-wavelength laser bathymetry system, which has finished the practical test.The practice has proved that the complex and changeable water environment seriously affects the accuracy of the underwater topography detection results, therefore, the uncertainty in the underwater propagation of blue-green laser should be paid more attention. By analyzing the multi-stage attenuation of echo signal and the propagation of bathymetry laser, we plan to build an accurate model of underwater layered optical path and propose an optimization method of space-time constraint accuracy based on the system scanning process. On the basis of the simplicity of operation mode, the above methods are adopted to improve the accuracy of water depth detection for the single-wavelength laser bathymetry system. This project aims to realize the methodological breakthrough of bathymetric waveform processing，and provides a reliable technical reference for further improving the system's bathymetric detection performance and developing of ocean environment monitoring .