多层常梯度声速剖面的测深误差改正方法
Bulletin of Surveying and Mapping(2023)
Abstract
声速剖面(SVP)是多波束测深重要参数.为提高观测数据质量,在复杂水域地带往往通过声速剖面加密观测法或数据内插法,但始终会产生不同程度的折射误差.本文通过分析声速对测深系统的影响和构建常梯度等效声速模型进行了推导,提出了常梯度声速剖面改正模型,较好地解决了声速代替误差或声速剖面不准确带来的影响.试验结果表明,该模型后处理解析的地形边缘数据具有更好的一致性,定量成果优于传统声速剖面改正算法.
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Key words
multi-beam sounding system,sound velocity profile correction,multi-layer constant gradient sound velocity profile model,acoustic tracking
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