Systematic error is one of the major factors that affect positioning accuracy owing to the changeable and complex nature of seawater environments. Based on a Global Navigation Satellite System-acoustic intelligent buoys system, whose acoustic array consists of a series of surface buoys, a single-difference method for underwater dynamic positioning is proposed to eliminate systematic error. Positioning configuration optimisation was addressed using dilution of precision (DOP). A simulation of DOP proved that for the single-difference method, a radiation network with a centre-difference reference point was superior to a regular polygon network. The positioning experiment showed that the novel method could effectively eliminate systematic error, improving vertical positioning accuracy from a metre- to a decimetre scale.

中文翻译：

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GNSS-声学智能浮标系统的单差动态定位方法

由于海水环境多变、复杂，系统误差是影响定位精度的主要因素之一。基于全球卫星导航系统——声学智能浮标系统，其声学阵列由一系列水面浮标组成，提出了一种消除系统误差的水下动力定位单差分法。使用精度稀释 (DOP) 解决了定位配置优化问题。DOP的仿真证明，对于单差法，具有中心差参考点的辐射网络优于正多边形网络。定位实验表明，新方法可以有效消除系统误差，将垂直定位精度从米级提高到分米级。