| 一种改进的机载激光测深深度偏差模型 |
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| 引用本文： | 赵建虎,吴敬文,赵兴磊,周丰年.一种改进的机载激光测深深度偏差模型[J].武汉大学学报(信息科学版),2019,44(3):328-333. |
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| 作者姓名： | 赵建虎 吴敬文 赵兴磊 周丰年 |
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| 作者单位： | 1.武汉大学测绘学院, 湖北 武汉, 430079 |
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| 基金项目： | 国家自然科学基金41576107国家自然科学基金41376109国家自然科学基金41176068国家科技重大专项2016YFB0501703 |
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| 摘 要： | 机载激光测深在潮间带获取海底地形应用中具有高效、灵活、经济等优点，但测深精度受海洋水文参数和仪器测量参数影响严重，传统偏差模型因顾及的要素不全面，修正精度不高。因此，采用逐步回归法构建了一种改进的顾及水深、水体含沙量、波束扫描角和传感器高度等参数的深度偏差修正模型。实验结果表明，机载激光测深原始水深经传统偏差模型和改进偏差模型修正后均能满足国际海道测量组织（International Hydrographic Organization，IHO）一等测深标准，且改进模型修正精度优于传统模型修正精度。
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| 关 键 词： | 机载激光测深 深度偏差 改进的深度偏差模型 测量参数 水文参数 |
| 收稿时间： | 2018-06-19 |
A Correction Model for Depth Bias in Airborne LiDAR Bathymetry Systems |
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| Affiliation: | 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China2.The Survey Bureau of Hydrology and Water Resources of Yangtze Estuary, Shanghai 200136, China3.College of Information Science and Engineering, Shandong Agricultural University, Tai'an 271018, China |
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| Abstract: | Airborne LiDAR bathymetry (ALB) has the characteristics of high efficiency and cost-effectiveness to obtain submarine topography in the intertidal zone. However, the accuracy of ALB is seriously affected by oceanic hydrological factors and cannot meet the accuracy standard of International Hydrographic Organization (IHO). Traditional correction models are used to correct the ALB depth biases. However, because the factors considered are not comprehensive enough in the traditional models, the accuracy of the traditional correction model for depth bias is not high. A comprehensive bias correction model and its construction method are proposed, which take into account the parameters of depth of water, suspended sediment concentration, beam scan angle and flight height. The traditional and the comprehensive models are used to correct the ALB depth biases. The experimental results show that ALB depth biases corrected by the both models can meet the accuracy standard of IHO, and the comprehensive model is better than the traditional model. |
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